阅读说明：本技术 一种油污收集池防油渗混凝土施工方法 (Oil-seepage-preventing concrete construction method for oil stain collecting tank ) 是由 李湘泉 邓星星 邓荣兵 *** 陈禹平 于 2019-11-27 设计创作，主要内容包括：本发明提供了一种油污收集池防油渗混凝土施工方法,其包括以下步骤：施工准备；搅拌并配制防油渗混凝土；运输防油渗混凝土；将所述防油渗混凝土运抵浇筑地点后,实施混凝土塌落度试验；浇筑所述防油渗混凝土；抹面压光；养护所述防油渗混凝土；所述防油渗混凝土的组分包括：水泥,砂,碎石,水,外加剂和混合材,并且,上述各组分的质量比为水泥：砂：碎石：水：外加剂：混合材＝1：3.24：4.72：0.72：0.150：0.41。本发明提供的油污收集池防油渗混凝土施工方法质量可靠,科学有效地防止油污收集池出现开裂、强度不足、混凝土均质性差等质量缺陷,因此,具有广阔的应用前景。(The invention provides an oil-seepage-preventing concrete construction method for an oil stain collecting tank, which comprises the following steps: construction preparation; stirring and preparing oil-seepage-proof concrete; transporting the oil-seepage-proof concrete; after the oil-seepage-proof concrete is transported to a pouring place, implementing a concrete slump test; pouring the oil-seepage-proof concrete; smearing and press polishing; curing the oil-seepage-resistant concrete; the oil-seepage-preventing concrete comprises the following components: the concrete comprises cement, sand, gravel, water, an additive and a mixed material, wherein the mass ratio of the components is cement: sand: crushing stone: water: additive: mixed material 1: 3.24: 4.72: 0.72: 0.150: 0.41. the construction method for the oil-seepage-preventing concrete of the oil stain collecting pool provided by the invention has reliable quality, and can scientifically and effectively prevent the oil stain collecting pool from having quality defects such as cracking, insufficient strength, poor concrete homogeneity and the like, so that the construction method has wide application prospect.)

1. The construction method of the oil-seepage-preventing concrete for the oil stain collecting pool is characterized by comprising the following steps of:

s1: construction preparation;

s2: stirring and preparing oil-seepage-proof concrete;

s3: transporting the oil-seepage-proof concrete;

s4: after the oil-seepage-proof concrete is transported to a pouring place, implementing a concrete slump test;

s5: pouring the oil-seepage-proof concrete;

s6: smearing and press polishing;

s7: curing the oil-seepage-resistant concrete;

wherein, the components of the oil-seepage-proof concrete comprise: the concrete comprises cement, sand, gravel, water, an additive and a mixed material, wherein the mass ratio of the components is cement: sand: crushing stone: water: additive: mixed material 1: 3.24: 4.72: 0.72: 0.150: 0.41.

2. the oil seepage prevention concrete construction method for the oil pollution collection pool according to claim 1, wherein the cement is ordinary portland cement, the strength grade of the cement is 42.5, the cement is low-hydration-heat cement, and the 7-day-hydration-heat index of the cement is not higher than 275 kJ/kg.

3. The oil-seepage-preventing concrete construction method for the oil stain collecting pool according to claim 1, wherein the fineness modulus of the sand is 2.3-2.6, and the mud content is less than or equal to 1%; the broken stone is granite or quartz stone, the particle size of the broken stone is 5-25 mm, and the mud content of the broken stone is less than or equal to 1%.

4. The oil seepage preventing concrete construction method for the oil collecting pool according to claim 1, wherein the additive comprises: a compacting agent, a polycarboxylic acid high-performance retarding water reducing agent, a SY-K expansion fiber anti-cracking waterproof agent and an oil-proof agent.

5. The oil seepage preventing concrete construction method for the oil stain collecting pool according to claim 4, wherein the addition mass of the compacting agent is 2.5% of the total mass of the oil seepage preventing concrete, the addition mass of the polycarboxylic acid high-performance retarding water reducing agent is 2% of the total mass of the oil seepage preventing concrete, the addition mass of the SY-K expansion fiber anti-cracking waterproof agent is 8.7% of the total mass of the oil seepage preventing concrete, and the addition mass of the oil-proof agent is 6% of the total mass of the oil seepage preventing concrete.

6. The construction method of the oil-seepage preventing concrete for the oil stain collecting pool according to claim 1, wherein the mixed material is fly ash and/or mineral powder.

7. The oil seepage prevention concrete construction method for the oil pollution collection pool according to claim 1, wherein in S3, the cement mixing drum in transportation needs to be stirred at a rotating speed of 2-4 r/min.

8. The oil seepage prevention concrete construction method for the oil pollution collection pool according to claim 1, further comprising the following operation steps in S5:

A) before pouring, the concealed works including the steel bars and the templates are qualified, the wood templates are watered and moistened in advance, and sundries falling in the templates are cleaned;

B) implementing the grease proofing muddy concrete surface course of oozing and pouring, when laying the surface course, should scribble the grease proofing muddy water anchor coat in basic unit's surface, including the following operation:

①, preparing oil-proof water seepage slurry, namely, firstly, neutralizing vinyl chloride-vinylidene chloride copolymer emulsion by using 10% concentration trisodium phosphate aqueous solution to ensure that the pH value is 7-8, adding 40 wt% OP solution required by the mixing proportion, uniformly stirring, then adding a defoaming agent to prepare vinyl chloride-vinylidene chloride mixed emulsion, then, uniformly stirring the vinyl chloride-vinylidene chloride mixed emulsion and water according to the volume ratio of 1: 1, adding cement while stirring, and fully stirring to obtain the oil-proof water seepage slurry;

② coating the bottom oil by naturally cooling the boiled oil-proof cement to 85-90 deg.C, slowly adding mixed solution of xylene and cyclohexanone while stirring, and stirring until the cement is completely dissolved to obtain the bottom oil;

③, determining whether an oil-seepage-proof isolation layer needs to be arranged according to design requirements, if so, arranging an oil-seepage-proof isolation layer below the surface layer and above the whole poured cement layer, wherein the oil-seepage-proof isolation layer is made of glass fiber cloth which is coated with one piece of glue and two pieces of oil-seepage-proof cement and has the thickness of 4mm, the glass fiber cloth is made of alkali-free mesh cloth, and the oil-seepage-proof cement has the thickness of 1.5-2 mm;

④ plastering cake screeding, namely, plastering cakes are plastered by the mixed oil-seepage-proof concrete according to the horizontal line of the surface layer and horizontal and vertical pull lines at the interval of 1.5 m;

⑤ the primer oil is applied and the surface layer is laid.

9. The oil seepage prevention concrete construction method for the oil pollution collection pool according to claim 1, further comprising the following operation steps in S6:

the trowelling work and the press polishing work are finished before the initial setting of the concrete of the surface layer; rubbing the surface of the surface layer with a wood trowel forcibly, and then rubbing and pressing the surface layer with an iron trowel for 2-3 times until the surface of the surface layer is compact, smooth and flat, and no iron mark is smeared; moreover, water sprinkling is strictly prohibited during calendering.

10. The oil seepage prevention concrete construction method for the oil pollution collection pool according to claim 1,

in S7, the curing is water storage curing or non-woven fabric covering and sprinkling curing.

Technical Field

The invention belongs to the technical field of concrete construction methods, and particularly relates to an oil-seepage-preventing concrete construction method for an oil stain collecting tank.

Background

At present, the building ground engineering of machining factory buildings in industrial buildings is particularly suitable for floor ground engineering after a machine tool goes upstairs and structures such as oil tanks, oil pools, oil grooves and the like, and concrete is often contacted with engine oil and even soaked by oil products such as the engine oil. The tests show that the ordinary cement concrete material has chemical stability for oil products of engine oil, etc., i.e. it does not have chemical action with cement at normal temp., and does not cause the dissolution of calcium hydroxide produced after hydration of cement. But oil products such as engine oil still have certain destructive effect on cement concrete. The main physical effects are as follows:

1. along with the extension of the oil immersion time of the cement concrete structure, oil gradually permeates into the inside of the cement stone structure to destroy the binding force between cement and coarse and fine aggregates, so that the concrete is loose and the strength is reduced. Particularly for the concrete which is short in age and not fully hardened, if the concrete is immersed into oil too early, the oil coats cement particles to prevent the cement from being fully hydrated, so that the later strength of the concrete is slowly increased and even stops increasing. If the oil contains higher acid, such as naphthenic acid, or contains certain vegetable oil (organic acid), the concrete strength is influenced to a certain extent. The acid value of the oil is increased, and the oil reacts with calcium hydroxide in the cement concrete to generate corresponding salt, so that the concrete is decomposed and damaged. Mineral oil is different from acid, alkali and salt substances, the latter can dissolve, leach or swell with cement stone components, and the erosion of concrete is a physical and chemical process. However, since mineral oil is more wettable to concrete, when it penetrates into the concrete and occupies the pores, it will cause a large wedge opening pressure to the pore walls, especially to the interface of aggregate-cement, and in severe cases, it will cause the particle cracks to extend, and reduce the compressive strength. Over time, a vicious cyclic process develops, eventually leading to severe concrete destruction, a phenomenon known as the "wedge effect".

2. After oil seeps into the concrete, the bond stress of the reinforcing steel bar can be obviously reduced. Test data show that even if the oil immersion time is short (45 days), the bond stress of concrete and reinforcing steel bars can be obviously reduced, particularly the action of No. 5 engine oil is most obvious, and the bond stress of a test piece immersed in No. 5 engine oil can be reduced by 50%. The bond stress of the reinforcing steel bars mainly comprises three parts: the bonding force, friction force and mechanical gripping force between the concrete and the steel bars. When mineral oil permeates into the joint of the steel bar and the concrete, the following effects are generated: (1) because the mineral oil has wedge opening effect on the micro cracks in the concrete set cement, the strength of the set cement is reduced, and the bonding force of the set cement with the gelling effect on the reinforcing steel bars is reduced. (2) The mineral oil lubricates both the concrete and the surface of the steel bars, and this reduces the friction between the steel bars and the concrete. (3) During the hardening process of concrete, accumulated water pores are formed at the lower part of the steel bar. After mineral oil penetrates into these pores, the mechanical engagement between the steel bars and the concrete is weakened due to the "wedge effect".

In order to prevent the concrete in industrial buildings contacting with oil products such as engine oil from being damaged and improve the durability of the concrete, the construction of the oil-seepage-proof concrete is required. The oil-seepage preventing concrete is a special concrete which is formed by adding additives such as ferric trichloride mixing agent or ferric hydroxide gel into concrete to improve the compactness of a surface material of the concrete, and is a high-compactness material and construction measures which can prevent oil medium from being corroded and quickly permeated and have certain wear resistance. However, at present, no uniform technical requirements for oil-seepage-resistant concrete proportioning, construction, maintenance and the like exist in China.

Disclosure of Invention

The invention aims to provide a construction method of oil-seepage-proof concrete for an oil stain collecting pool, which is simple to operate, sets a reasonable raw material selection standard through repeated tests, develops the mix proportion of the oil-seepage-proof concrete by self, adds a proper compacting agent when preparing the oil-proof concrete so as to enhance the compactness of the concrete, and sets a construction method specially aiming at the maintenance of the oil-seepage-proof concrete. The construction method for the oil-seepage-preventing concrete of the oil stain collecting pool provided by the invention has reliable quality, and can scientifically and effectively prevent the oil stain collecting pool from having quality defects such as cracking, insufficient strength, poor concrete homogeneity and the like.

Specifically, the invention provides an oil seepage prevention concrete construction method for an oil stain collecting tank, which comprises the following steps:

s1: construction preparation;

s2: stirring and preparing oil-seepage-proof concrete;

s3: transporting the oil-seepage-proof concrete;

s4: after the oil-seepage-proof concrete is transported to a pouring place, implementing a concrete slump test;

s5: pouring the oil-seepage-proof concrete;

s6: smearing and press polishing;

s7: curing the oil-seepage-resistant concrete;

wherein, the components of the oil-seepage-proof concrete comprise: the concrete comprises cement, sand, gravel, water, an additive and a mixed material, wherein the mass ratio of the components is cement: sand: crushing stone: water: additive: mixed material 1: 3.24: 4.72: 0.72: 0.150: 0.41.

preferably, in the oil-seepage-preventing concrete construction method for the oil pollution collection tank, the cement is ordinary portland cement, the strength grade of the cement is 42.5, the cement is low-hydration-heat cement, and the 7-day hydration-heat index of the cement is not higher than 275 kJ/kg.

Preferably, in the oil-seepage-preventing concrete construction method for the oil stain collecting tank, the fineness modulus of the sand is 2.3-2.6, and the mud content is less than or equal to 1%; the broken stone is granite or quartz stone, the particle size of the broken stone is 5-25 mm, and the mud content of the broken stone is less than or equal to 1%.

Preferably, in the oil-seepage-preventing concrete construction method for the oil-contaminated collecting tank, the additive comprises: a compacting agent, a polycarboxylic acid high-performance retarding water reducing agent, a SY-K expansion fiber anti-cracking waterproof agent and an oil-proof agent.

Wherein the oil-proof agent is a ferric trichloride mixing agent or a ferric hydroxide gel.

Further preferably, in the oil-seepage-preventing concrete construction method for the oil stain collecting pool, the addition mass of the compacting agent is 2.5% of the total mass of the oil-seepage-preventing concrete, the addition mass of the polycarboxylic acid high-performance retarding water reducing agent is 2% of the total mass of the oil-seepage-preventing concrete, the addition mass of the SY-K expansion fiber anti-cracking waterproof agent is 8.7% of the total mass of the oil-seepage-preventing concrete, and the addition mass of the oil-proof agent is 6% of the total mass of the oil-seepage-preventing concrete.

Preferably, in the construction method of the oil-seepage-preventing concrete for the oil pollution collecting tank, the mixed material is fly ash and/or mineral powder.

Preferably, in the oil-seepage-preventing concrete construction method for the oil-contaminated collecting tank, in step S3, the cement mixing drum during transportation should be stirred at a rotation speed of 2 to 4 r/min.

Preferably, in the oil-seepage-preventing concrete construction method for the oil-contaminated collecting tank, in S5, the method further includes the following operation steps:

A) before pouring, the concealed works including the steel bars and the templates are qualified, the wood templates are watered and moistened in advance, and sundries falling in the templates are cleaned;

B) implementing the grease proofing muddy concrete surface course of oozing and pouring, when laying the surface course, should scribble the grease proofing muddy water anchor coat in basic unit's surface, including the following operation:

①, preparing oil-proof water seepage slurry, namely, firstly, neutralizing vinyl chloride-vinylidene chloride copolymer emulsion by using 10% concentration trisodium phosphate aqueous solution to ensure that the pH value is 7-8, adding 40 wt% OP solution required by the mixing proportion, uniformly stirring, then adding a defoaming agent to prepare vinyl chloride-vinylidene chloride mixed emulsion, then, uniformly stirring the vinyl chloride-vinylidene chloride mixed emulsion and water according to the volume ratio of 1: 1, adding cement while stirring, and fully stirring to obtain the oil-proof water seepage slurry;

② coating the bottom oil by naturally cooling the boiled oil-proof cement to 85-90 deg.C, slowly adding mixed solution of xylene and cyclohexanone while stirring, and stirring until the cement is completely dissolved to obtain the bottom oil;

③, determining whether an oil-seepage-proof isolation layer needs to be arranged according to design requirements, if so, arranging an oil-seepage-proof isolation layer below the surface layer and above the whole poured cement layer, wherein the oil-seepage-proof isolation layer is made of glass fiber cloth which is coated with one piece of glue and two pieces of oil-seepage-proof cement and has the thickness of 4mm, the glass fiber cloth is made of alkali-free mesh cloth, and the oil-seepage-proof cement has the thickness of 1.5-2 mm;

④ plastering cake screeding, namely, plastering cakes are plastered by the mixed oil-seepage-proof concrete according to the horizontal line of the surface layer and horizontal and vertical pull lines at the interval of 1.5 m;

⑤ the primer oil is applied and the surface layer is laid.

Preferably, in the oil-seepage-preventing concrete construction method for the oil-contaminated collecting tank, in S6, the method further includes the following operation steps:

the trowelling work and the press polishing work are finished before the initial setting of the concrete of the surface layer; rubbing the surface of the surface layer with a wood trowel forcibly, and then rubbing and pressing the surface layer with an iron trowel for 2-3 times until the surface of the surface layer is compact, smooth and flat, and no iron mark is smeared; moreover, water sprinkling is strictly prohibited during calendering.

Preferably, in the oil-seepage-preventing concrete construction method for the oil contamination collecting tank, in S7, the curing is water storage curing or non-woven fabric covering and water spraying curing.

In summary, compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

1) compared with the conventional oil-resistant seepage concrete, the oil-resistant seepage concrete has better workability and construction operability, does not generate cracks after initial setting, and does not generate shrinkage cracking phenomenon.

2) The invention adopts a method combining covering and water storage curing, curing is not less than 14 days, and the full hydration of the concrete is effectively ensured.

3) The oil-seepage-resistant concrete also has the following characteristics: the oil-resistant bearing has two functions of oil seepage resistance and bearing, so that materials can be saved, and the construction speed can be accelerated; the material source is wide, and the cost is low; under the condition of complex structure modeling, the construction is simple and convenient, the oil seepage prevention performance is reliable, and the applicability is strong; the water leakage is easy to check and repair; the durability is good; can improve the labor condition.

3) The oil-seepage-preventing concrete construction method for the oil stain collecting pool can simultaneously generate a plurality of benefits in the aspects of construction quality, construction period and construction cost:

① construction quality, stable construction performance, no construction quality defects such as difficult construction, poor workability, cracking and the like;

② in construction period, the construction technology of oil-seepage prevention concrete of the oil stain collecting pool adopts one-time mixing in a concrete mixing plant, compared with other construction technologies of adding additives on site, the construction process on site is reduced, the quality of the mixture is ensured, the rework is reduced, the construction period can be scientifically arranged, the process is simple, the construction period is shortened, and the construction progress is greatly accelerated;

③ compared with the conventional construction technology, the construction technology reduces the rework and repair and reduces the processing cost of concrete mixture.

In conclusion, the oil-seepage-preventing concrete construction method for the oil stain collecting tank has wide application prospect.

Drawings

FIG. 1 is a process flow chart of the construction method of the oil-seepage-proof concrete of the oil pollution collecting tank.

Detailed Description

The present invention will be further described with reference to the following detailed description, but the invention is not limited thereto; in addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

In order to reduce or avoid the harm of oil leakage of a cement concrete structure or the ground and improve the oil leakage resistance of the concrete according to the harm reasons, the invention adopts the aspects of reasonably selecting raw materials, reasonably designing the mix proportion of the concrete, correctly curing, improving the compactness of the concrete, improving the internal pore structure of the concrete and the like to ensure the construction quality of the oil leakage resistant concrete.

In a preferred embodiment, the construction method of the oil-seepage-proof concrete for the oil pollution collecting tank comprises the following steps:

s1: construction preparation; the method comprises the following steps:

1) the construction technical responsible persons and all related construction management personnel before the construction of each process flow must be familiar with drawings, compile each special construction scheme, determine construction positions and engineering quantities, and make a construction progress plan according to the requirements of a construction period. 2) And organizing construction teams to carry out technical background crossing and well do three-level safety education. 3) And (4) compiling a construction plane layout, selecting positions which are beneficial to transportation and storage of materials, semi-finished products, turnover materials, construction machinery and the like, making enclosure, and making civilized construction of the marks. 4) Deepening the design drawing, wherein design technicians must go to the site to investigate the actual situation of the site. 5) And making a drawing review work. 6) Before construction, the project of the related sub-parts such as the previous working procedure is accepted, and the relevant departments should be confirmed to have accepted and handed over.

S2: stirring and preparing oil-seepage-proof concrete; wherein, the components of the oil-seepage-proof concrete comprise: the concrete comprises cement, sand, gravel, water, an additive and a mixed material, wherein the mass ratio of the components is cement: sand: crushing stone: water: additive: mixed material 1: 3.24: 4.72: 0.72: 0.150: 0.41.

wherein the cement is ordinary portland cement, the strength grade of the cement is 42.5, the cement is low-hydration-heat cement, and the 7-day hydration-heat index of the cement is not higher than 275 kJ/kg. In addition, early strength cement with an R character must not be used. Wherein the fineness modulus of the sand is 2.3-2.6, and the mud content is less than or equal to 1%; the broken stone is granite or quartz stone, the particle size of the broken stone is 5-25 mm, and the mud content of the broken stone is less than or equal to 1%. Wherein the admixture is fly ash and/or mineral powder and is used for improving the workability of concrete mixture, and the mixing amount of the admixture is determined by tests.

And the dosage of the cement is not less than 380kg/m ³The water-to-glue ratio is less than 0.55; the sand rate of the concrete is between 30 and 33 percent, and the maximum sand rate cannot exceed 35 percent; the water consumption of the concrete is subject to the water consumption that the slump is controlled within the range of (150 +/-10) mm; when oil-resistant concrete is prepared, a proper compacting agent is added to enhance the compactness of the concrete.

In addition, when the concrete is stirred, the stirring time is prolonged by 30-60 seconds compared with the normal stirring time, the stirring time is generally not less than 2-3min, and the concrete must be uniformly stirred.

S3: transporting the oil-seepage-proof concrete;

s4: after the oil-seepage-proof concrete is transported to a pouring place, implementing a concrete slump test; firstly, immediately carrying out slump tests by quality inspectors, controlling the slump to be (150 +/-10) mm, and if excessive slump loss is found, requiring technicians of a concrete mixing plant to handle or return goods and strictly forbidding any water addition to the concrete in a transport vehicle; strictly pumping concrete with quality not meeting the pumping requirement into a pump;

s5: pouring the oil-seepage-proof concrete;

s6: smearing and press polishing;

s7: curing the oil-seepage-resistant concrete;

in a preferred embodiment, the admixture comprises: a compacting agent, a polycarboxylic acid high-performance retarding water reducing agent, a SY-K expansion fiber anti-cracking waterproof agent and an oil-proof agent.

In a further preferred embodiment, the addition mass of the compacting agent is 2.5% of the total mass of the oil-seepage-proof concrete, the addition mass of the polycarboxylic acid high-performance retarding water reducing agent is 2% of the total mass of the oil-seepage-proof concrete, the addition mass of the SY-K expansion fiber anti-cracking and water-proofing agent is 8.7% of the total mass of the oil-seepage-proof concrete, and the addition mass of the oil-proofing agent is 6% of the total mass of the oil-seepage-proof concrete.

In another preferred embodiment, in S3, the cement mixing drum in transit should be stirred at a speed of 2-4 r/min to ensure that the concrete will not segregate during long-distance transportation. In addition, the concrete container should be smooth and clean, not absorb water and leak slurry, be wet with water before charging, be covered in hot weather or weather to prevent water evaporation or water inflow, and be provided with heat preservation measures in winter.

In another preferred embodiment, in S5, the following steps are further included:

A) before pouring, the concealed works including the steel bars and the templates are qualified, the wood templates are watered and moistened in advance, and sundries falling in the templates are cleaned;

also, it should be noted that:

1. the oil stain pool bottom plate is poured and tamped for continuous construction, the position of a dowel bar of a shear wall is particularly noticed, the inclined displacement in pouring and vibration is prevented, and an inserted vibrator is adopted for vibration, so that the vibration is required to be compact.

2. Greasy dirt pond lateral wall shear force wall is pour, include: (1) before formwork support, the elevation and the positions of the inner wall line and the outer wall line are checked again, and the formwork support is not needed when the line is not seen or is influenced by the displacement of the reinforcing steel bars. (2) Before the formwork is supported, the surface of the formwork is coated with a release agent. (3) And a water stop sheet must be additionally welded in the middle of the wall-penetrating bolt used by the concrete outer wall. (4) When the bottommost formwork is installed, the formworks are required to be staggered in height so as to ensure that the adjacent formworks on the upper portion are horizontally staggered. (5) The concrete should be continuously cast to avoid the construction joints, the number of workers in three shifts should be ensured, and the maneuvering index should be used. (6) When the weather forecast is listened, the rain sheltering tools such as plastic cloth, canvas and the like used in emergency are prepared. (7) Before concrete pouring, various pre-inspection and hidden inspection work is carried out, particularly whether waterproof treatment is carried out on the wall penetrating positions of pipelines and embedded parts, waterproof reinforcing steel bars, waterproof pull rods for fixing templates and the like or not is carried out, and pouring can be started after the concrete is qualified. (8) The engineering foundation slab is constructed in sections according to a post-cast strip, and a horizontal construction joint of a wall body is left at a position which is 30cm higher than the surface of the slab and adopts a convex joint form. (9) When the concrete on the upper part of the wall body is poured, the surface of the concrete is chiseled, impurities are removed, the concrete is washed and moistened, and before pouring, a layer of cement mortar with the thickness of 2-3 cm is paved on the pouring position (the stones are removed according to the original proportion). The pouring method comprises the following steps: and symmetrically propelling the wall to two ends in two ways from the middle of each section of wall, and sequentially constructing the wall in sequence step by step. The vibration adopts mechanical vibration, the vibration time is generally not less than 15 seconds, vibration leakage and over vibration are avoided, the vibration ensures that the surface of the concrete has no bubbles until sinking, the symmetrical positions are selected for laying the mortar and the vibration to prevent the template from moving, and when the concrete is poured to the uppermost layer, the top is leveled by a trowel to ensure that the surface is compact and flat.

B) Implementing the grease proofing muddy concrete surface course of oozing and pouring, when laying the surface course, should scribble the grease proofing muddy water anchor coat in basic unit's surface, including the following operation:

①, preparing oil-proof water seepage slurry, namely, firstly, neutralizing vinyl chloride-vinylidene chloride copolymer emulsion by using 10% concentration trisodium phosphate aqueous solution to ensure that the pH value is 7-8, adding 40 wt% OP solution required by the mixing proportion, uniformly stirring, then adding a defoaming agent to prepare vinyl chloride-vinylidene chloride mixed emulsion, then, uniformly stirring the vinyl chloride-vinylidene chloride mixed emulsion and water according to the volume ratio of 1: 1, adding cement while stirring, and fully stirring to obtain the oil-proof water seepage slurry;

② coating the bottom oil by naturally cooling the boiled oil-proof cement to 85-90 deg.C, slowly adding mixed solution of xylene and cyclohexanone while stirring, and stirring until the cement is completely dissolved to obtain the bottom oil;

③, determining whether an oil-seepage-proof isolation layer needs to be arranged according to design requirements, if so, arranging an oil-seepage-proof isolation layer below the surface layer and above the whole poured cement layer, wherein the oil-seepage-proof isolation layer is made of glass fiber cloth which is coated with one piece of glue and two pieces of oil-seepage-proof cement and has the thickness of 4mm, the glass fiber cloth is made of alkali-free mesh cloth, and the oil-seepage-proof cement has the thickness of 1.5-2 mm;

④ plastering cake screeding, namely, plastering cakes are plastered by the mixed oil-seepage-proof concrete according to the horizontal line of the surface layer and horizontal and vertical pull lines at the interval of 1.5 m;

⑤ the base oil is coated and the surface layer is laid, which comprises (1) the mixing proportion of the oil-proof concrete is determined by the strength grade and the impermeability of the design requirement, the oil-proof concrete is mixed correctly, the admixture is diluted according to the requirement and mixed in the specified proportion, the mixing is uniform, the mixing time is 2min, the slump is not more than 10mm during the pouring, (2) the oil-proof concrete is poured according to the height of the divided sections and the ash cakes, the pouring is carried out by using a big bar, the cement mortar is vibrated by using a flat plate vibrator, the vibration is required to be compact, the depth of the dividing joint of the surface layer is the total thickness of the surface layer, the vertical through is carried out, the width is 15-20 mm, the oil-proof cement mortar material is poured into the joint, the elastic multifunctional polyurethane coating material is preferably used for caulking, the depth of 20-25 mm is left on the upper part of the joint, the oil-proof cement mortar is used for sealing the joint according to the product preparationAnd (5) instructions for use. (4) And (3) pouring construction of an oil-proof concrete seepage surface layer is carried out according to a concrete construction process, the thickness is 60-70 mm, the vibration is dense, and the vibration cannot leak. (5) When the compressive strength of the oil-proof concrete surface layer reaches 5N/mm ²When in use, the dividing joints are cleaned and dried, and after similar base oil is coated once, the anti-oil-seepage daub is poured while the daub is hot.

In a preferred embodiment, in S6, the following steps are further included:

the trowelling work and the press polishing work are finished before the initial setting of the concrete of the surface layer; rubbing the surface of the surface layer with a wood trowel forcibly, and then rubbing and pressing the surface layer with an iron trowel for 2-3 times until the surface of the surface layer is compact, smooth and flat, and no iron mark is smeared; moreover, water sprinkling is strictly prohibited during calendering.

In a further preferred embodiment, S6 specifically includes:

(1) after the surface layer is soaked in water, the surface layer is rubbed and smoothed by a wooden trowel, and the mixture of the dry-mixed cement sand and the slurry of the concrete is mixed to make the surface layer tightly jointed.

(2) First-pass wiping: lightly plastering and pressing once by using an iron trowel until the slurry is discharged;

(3) second time of smearing: after the surface mortar is initially set (people have foot prints but do not sink), filling and leveling the pits and the sand holes by using an iron trowel, and paying attention to no pressure leakage;

(4) and (3) third time of smearing: before the surface mortar is finally set (people have slight foot prints), forcibly wiping and pressing the surface mortar by using an iron trowel; and flattening and press polishing all the smeared lines to achieve the purpose of compact and smooth surface of the surface layer.

In a preferred embodiment, in S7, the curing is water storage curing or non-woven fabric covering and sprinkling curing.

It should be added that after the concrete is poured, the surface layer should be cured according to the temperature and humidity of the environment. The curing time of the oil-seepage-proof concrete is not less than 14 days, the oil-seepage-proof concrete can be used by people after the compressive strength reaches 5MPa, and the oil-seepage-proof concrete can be normally used only after the compressive strength reaches the design requirement. In the greasy dirt collecting tank pond and the ground that possesses the retaining maintenance, the retaining maintenance is adopted to the anti oil infiltration concrete, to pool wall concrete and the ground that does not possess the retaining maintenance, then adopts the non-woven fabrics to cover the watering maintenance.

In addition, the inventor has also carried out grease proofing muddy concrete detection, keeps the impervious test block of grease proofing muddy concrete, anti-oil seepage test block, resistance to compression test block and the test block of removing the mould according to the standard regulation promptly to implement the detection, specifically include:

① the strength of the test piece is measured by standard curing for 28 days, the concrete test piece formed with the test piece is put into engine oil (No. 30 engine oil is generally selected), when the test piece is put into the engine oil, the bottom surface of the test piece has a certain interval with the container, generally 20-50 mm, and a certain gap is left between the test pieces, after the test piece is soaked in the engine oil for 30 days, the test piece is taken out, the engine oil on the surface is wiped off, the concrete compression strength test is carried out under a pressure tester, and the ratio of the difference value between the detection value and the strength value of the concrete standard curing 28 to the original 28-day strength is the concrete strength increase rate.

② the test piece which is standard-maintained for 28 days is baked for 48 hours at the temperature of 105 ℃, and is put into a drying oven for cooling and weighing, after the initial weight is recorded, the test piece is soaked in engine oil for 30 days and is taken out, the engine oil on the surface is wiped off and is weighed, and the ratio of the difference of the two weights to the original test piece is the penetration rate of the concrete engine oil.

③ the test piece which is standard-cultured for 28 days is taken out one day in advance, sealed by paraffin and then put into a concrete impermeability instrument, and the concrete impermeability grade is tested according to the impermeability test of the waterproof agent.

In addition, the technical standards of the construction method for the oil-seepage-preventing concrete of the oil stain collecting tank provided by the invention are as follows: the concrete strength testing and accepting system comprises a unified standard for construction quality acceptance of constructional engineering (GB50300-2013), a design rule of a mix proportion of common concrete (JGJ 55-2011), a specification for construction quality acceptance of a concrete structure (GB 50204-2015), a standard for concrete quality control (GB 50164-2011), a standard for a performance test method of a mixture of common concrete (GB/T50080-2016), a test method for mechanical performance of common concrete (GB/T50081-2002), a standard for testing and evaluating concrete strength (GB/T50107-2010) and a concrete admixture (GB076-2008) and related specifications, standards and regulations of the current state, province and city.

The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.