阅读说明：本技术 一种复合结构再生骨料烧结透水砖 (Composite construction recycled aggregate sintering brick that permeates water ) 是由 边华英 王学涛 尹青亚 王焱 田之涯 娄广辉 于 2021-09-17 设计创作，主要内容包括：本发明公开了一种复合结构再生骨料烧结透水砖,属于新型建材技术领域。其为复合型盲孔烧结透水砖,由砖体和盲孔组成,盲孔沿砖底面顺着长边方向的中线均匀分布于砖体中下部基体中,盲孔孔口向下,孔盲端位于顶面向下约20-30%砖厚度处。砖体由配方不同的上部过滤透水层与下部透水层组成,上、下层分别采用同一色泽或不同色泽,不同骨料粒度的成型料制成。上下层厚度比为1︰(7-10)。与当前市场上流通的透水混凝土路面砖相比具有更加优异的抗冻性、透水性、耐磨性、防滑性,与现有的陶瓷透水砖相比,具有优异的透水、防滑、节材、节能特征,能够很好地实现海绵城市的铺装效果。(The invention discloses a composite-structure recycled aggregate sintered water permeable brick, and belongs to the technical field of novel building materials. The composite blind hole sintered permeable brick comprises a brick body and blind holes, wherein the blind holes are uniformly distributed in a middle-lower matrix of the brick body along the central line of the bottom surface of the brick along the long edge direction, the orifices of the blind holes are downward, and the blind ends of the blind holes are positioned at the positions of about 20-30% of the thickness of the brick from the top surface downward. The brick body is composed of an upper filtering permeable layer and a lower permeable layer with different formulas, and the upper layer and the lower layer are respectively made of molding materials with the same color or different colors and different aggregate granularities. The thickness ratio of the upper layer to the lower layer is 1: 7-10. Compared with the permeable concrete pavement bricks circulating in the current market, the permeable concrete pavement bricks have more excellent freezing resistance, water permeability, wear resistance and skid resistance, compared with the existing ceramic permeable bricks, have excellent permeable, skid resistance, material saving and energy saving characteristics, and can well realize the pavement effect of sponge cities.)

1. A sintered permeable brick is characterized by comprising a brick body and blind holes, wherein the blind holes are uniformly distributed in a middle-lower matrix of the brick body along the central line of the bottom surface of the brick along the long edge direction, the openings of the blind holes are downward, and the blind ends of the holes are positioned at the positions 20-30% of the thickness of the brick downward from the top surface; the brick body consists of an upper filtering permeable layer and a lower permeable layer which have different formulas, and the upper part and the lower part are respectively made of molding materials with the same color or different colors and different aggregate granularities;

the molding material is prepared by mixing regenerated aggregate obtained by crushing and screening a waste ceramic grinding tool, a special ceramic binder, dextrin powder and dextrin liquid; the aggregate used by the upper filtering permeable layer is finer than the aggregate used by the lower permeable layer;

the molding material of the upper filtering permeable layer is prepared by mixing the following components in percentage by weight:

80-90% of regenerated aggregate is crushed by the waste ceramic grinding tool,

5 to 12 percent of special ceramic bond,

1.5 to 3 percent of binder dextrin powder,

3-6% of humectant paste liquid,

0.5 to 3 percent of inorganic pigment;

the molding material of the lower permeable layer is prepared by mixing the following components: the weight percentage of each component is calculated,

80-94% of recycled aggregate is crushed by the waste ceramic grinding tool,

2 to 12 percent of special ceramic bond,

2 to 3 percent of binder dextrin powder,

2-5% of humectant dextrin liquid;

wherein, the special ceramic bonding agent adopts a low-temperature bonding agent, and the components are as follows: clay powder 10-20 wt%, feldspar powder 40-60 wt% and boron glass powder 20-50 wt%.

2. The sintered water permeable brick of claim 1, wherein the number of the blind holes is 2 to 3, and the blind holes are circular holes, the sum of the diameters of the blind holes is about 0.6 times of the long side of the bottom surface of the brick, and the depth of the blind holes is 70 to 80% of the thickness of the brick.

3. The sintered water permeable brick of claim 1, wherein the thickness ratio of the upper filtering water permeable layer to the lower water permeable layer is 1: 7-10.

4. The sintered water permeable brick according to any one of claims 1 to 3, wherein the aggregate used in the upper and lower layer molding materials is recycled aggregate crushed by 20-30# and 6-20# waste ceramic grinding tools, respectively.

Technical Field

The invention belongs to the technical field of novel building materials, and particularly relates to a composite structure recycled aggregate sintered water permeable brick and a preparation method thereof.

Background

In order to change the current urban 'sea-seeing' mode in heavy rain, heavy rain and extra heavy rain and realize the coordinated development of urbanization and natural environment, the concept of sponge city construction is deep into the mind. The sponge city changes the traditional 'fast drainage' mode into an 'infiltration, stagnation, storage, filtration, utilization and drainage' measure organic combination mode, hopefully reduces the negative effects of large-area hardening of urbanization development and construction on the original natural hydrological characteristics and water ecological environment to the greatest extent, thereby realizing natural accumulation, infiltration, purification and utilization of rainwater. The sponge city needs to be realized by utilizing a large amount of high-performance water permeable bricks to carry out water permeable pavement transformation on the existing square and road and executing the engineering construction standard 'sand-based water permeable brick engineering construction and acceptance rules CECS 244: 2008'.

The traditional floor tile is a sintered brick, the main component of the traditional floor tile is yellow clay or shale, the mass production of the clay sintered brick can destroy cultivated land, so that the adhesion is basically forbidden in all places, and the novel building material is developed, and the shale brick also has poor water permeability because the organization structure contains more micropores. At present, the water permeable pavement of roads is developed in a plurality of cities, the sidewalks of a plurality of roads are widely made of novel water permeable bricks, and particularly, the water permeable bricks are widely sintered in the frozen cities in winter in the north.

The common water permeable bricks are bricks with more air holes in the brick tissue structure and comprise common concrete water permeable bricks, polymer fiber reinforced concrete water permeable bricks, composite concrete water permeable bricks and sintered water permeable bricks. The common concrete permeable brick is prepared by adopting main components of aggregates such as common macadam, steel slag, waste concrete recycled aggregates and the like, adding part of cement and gypsum as binders, pressing, and then curing and solidifying, and the preparation period is long. The main components of the polymer fiber concrete permeable brick are pebbles, cement and a polymer reinforcing material, the added polypropylene fiber greatly improves the strength, but the polypropylene fiber makes the material compact, so that the water permeability is reduced. The main components of the composite concrete permeable brick are colored granite and marble stones, the composite concrete permeable brick is reinforced by polymer fibers or modified epoxy resin, the appearance is diversified, but the material cost is high, the resin in the composite concrete permeable brick can age under long-time illumination, and the performance is sharply reduced. The typical sintered permeable brick is an environment-friendly inorganic non-metallic material with rock performance, has higher porosity and good water permeability, can effectively relieve surface accumulated water, can effectively isolate noise, has good frost resistance and aging resistance, has good environmental compatibility, and has good water retention performance, in rainy season, a large amount of laid ceramic permeable bricks can store and retain certain moisture in internal pores, which is equivalent to that a small-sized underground reservoir is arranged in a city, in a dry weather period, the moisture retained in the brick body is released and evaporated along with the rise of the temperature, the effects of reducing the temperature, protecting vegetation and adjusting the microenvironment are achieved. However, when the method is widely popularized and applied, the increment and stock of the existing waste ceramic tiles and waste sanitary wares for preparing the aggregates are close in components and consistent in temperature resistance, and some enterprises adopt a production process for producing the sintered water permeable bricks by firstly preparing ceramic blocks from natural raw materials such as clay, feldspar, quartz sand, talc and the like and then crushing the ceramic blocks to prepare the aggregates, so that the production cost and the price of the high-quality sintered water permeable bricks are kept high, and the application and popularization of the sintered water permeable bricks are limited. At present, natural raw materials such as clay, feldspar, quartz sand, talc and the like are increasingly deficient, and in order to build a sustainable development conservation-oriented society, the search for an aggregate source which can be replaced by the sintered water permeable brick is imperative and necessary.

In order to build a sustainable development society, better develop the recycling economy, develop and utilize renewable resources, save natural sandstone raw materials, particularly save natural raw material resources such as clay, feldspar, quartz, talc and the like used by the sintered water permeable brick, the preparation of the relatively low-carbon, energy-saving, environment-friendly and waste-utilizing sintered water permeable brick with reliable quality and excellent performance is urgently needed.

A large amount of unqualified product grinding tools and used grinding tool waste products exist in grinding tool production enterprises and grinding tool user enterprises, and the grinding tool production enterprises and the grinding tool user enterprises need to develop and utilize the grinding tools and the used grinding tool waste products more efficiently. Because the waste ceramic grinding tools have a certain residual value and are not used as solid wastes to be simply treated, the waste ceramic grinding tools occupy more stacking space when placed in an enterprise factory, waste expensive land or storage building area and influence the tidiness and the attractiveness of the enterprise factory to a certain extent. If the waste ceramic grinding tools are crushed into recycled aggregate with a composite structure for use, the consumption of resources such as non-renewable natural sandstone, clay, feldspar, quartz, talc and the like can be reduced, and the method is a very feasible way. The aggregate of the composite structure has firmness, resintering property and porosity, can enhance the water permeability, filtering property and water storage and drainage property of the permeable brick of the composite structure, and has excellent wear resistance and skid resistance. The high-performance recycled aggregate for the sintered water permeable bricks is prepared by crushing and screening the waste ceramic grinding tool, is an ideal recycling way, can fill the blank of the high-performance composite structure aggregate for the sintered water permeable bricks in the market, and is an excellent water permeable paving material suitable for the current sponge city construction.

Disclosure of Invention

The invention aims to prepare high-performance recycled aggregate with a composite structure by crushing and screening a waste ceramic grinding tool and further prepare a composite-structure sintered water permeable brick with good performance by combining the current situation of the conventional sintered water permeable brick, and the composite-structure sintered water permeable brick is used for water permeable pavement of squares or roads and promotion of sponge city construction.

In order to achieve the purpose, the sintered water permeable brick is designed into a blind hole brick, the blind hole sintered water permeable brick is a composite brick and consists of a brick body and blind holes, the blind holes are uniformly distributed in a matrix at the middle lower part of the brick body along the central line of the bottom surface of the brick along the long edge direction, the openings of the blind holes are downward, and the blind ends of the blind holes are positioned at the position of about 20-30% of the thickness of the brick from the top surface downward. The brick body is composed of an upper filtering permeable layer and a lower permeable layer with different formulas, and the upper part and the lower part are respectively made of molding materials with the same color or different colors and different aggregate granularities.

The blind holes are preferably 2-3 and are round holes, the sum of the diameters of the holes is about 0.6 time of the long edge of the bottom surface of the brick, and the depth of each blind hole is 70-80% of the thickness of the brick.

The thickness ratio of the upper filtering permeable layer to the lower permeable layer is 1: 7-10.

Aggregate of the main material of the blind hole sintered permeable brick is recycled aggregate with a composite structure obtained by crushing and screening a waste ceramic grinding tool, the granularity of the aggregate used by the upper layer of the porous layer is smaller than that of the aggregate used by the lower layer of the porous layer, and the aggregate used by the upper and lower layers of molding materials is preferably 20-30# and 6-20# waste ceramic grinding tool crushed recycled aggregate respectively.

Wherein, the upper filtering permeable layer is formed by mixing the following materials: the weight percentage of each component is calculated,

80-90% of aggregate with a composite structure is crushed and regenerated by the waste ceramic grinding tool,

5 to 12 percent of special ceramic bond,

1.5 to 3 percent of binder dextrin powder

3-6% of humectant paste liquid

0.5 to 3 percent of inorganic pigment;

the lower permeable layer is formed by mixing the following materials: the weight percentage of each component is calculated,

80-94% of aggregate with a composite structure is crushed and regenerated by the waste ceramic grinding tool,

2 to 12 percent of special ceramic bond,

2 to 3 percent of binder dextrin powder,

humectant dextrin liquid 2-5%.

Wherein, the special ceramic bonding agent adopts a low-temperature bonding agent, and the components are as follows: clay powder 10-20 wt%, feldspar powder 40-60 wt% and boron glass powder 20-50 wt%. The particle sizes of the clay powder, the feldspar powder and the boron glass powder are 100-320 meshes.

The preparation method comprises the following steps: firstly, weighing a waste ceramic grinding tool, crushing and screening to obtain recycled composite structure aggregate, putting the recycled composite structure aggregate into a mixer, adding a special ceramic binder and an auxiliary agent, mixing to form a molding material, respectively carding and strickling an upper layer structure and a lower layer structure by adopting a secondary feeding method of respectively feeding during molding, then integrally pressing at one time, demolding, drying and firing to obtain the sintered water permeable brick.

Wherein, the molding material is mixed by adopting a double S-shaped mixing pot, the rotating speed is 150- "200 rad/min, and the total mixing time is 6-15 min.

Wherein the pressure of the compression molding is 4.0-6.0MPa, the drying temperature is 80-120 ℃, and the temperature is kept for 7-12 h. The firing temperature curve is: firstly heating to 420 ℃ at the heating rate of 5-7 ℃/min, then heating to 1000-1100 ℃ at the heating rate of 2-5 ℃/min, preserving the heat for 1.5-2h, then stopping heating, and naturally cooling to obtain the sintered water permeable brick.

Wherein the pigment is one of cobalt blue, iron oxide red, chromium green and iron oxide yellow inorganic pigments.

The waste ceramic grinding tool used for preparing the recycled aggregate is mainly a ceramic grinding tool made of a common grinding material, and specifically comprises white corundum, brown corundum, chrome corundum, monocrystalline corundum, green silicon carbide, black silicon carbide and the like, wherein the grinding granularity is 6-150 #;

considering the influence of the aggregate on the water permeability and the strength of the brick, the screen meshes of No. 6, No. 20 and No. 30 are selected, the recycled aggregate of the waste ceramic grinding tool is screened, and the effectiveness is as follows: the 20-30# recycled aggregate has small granularity and relatively large bulk density, and the molding material of the upper filtering permeable layer prepared by taking the recycled aggregate as a main material has high strength, large hardness, good wear resistance, better shape retention and difficult corner falling after being fired. The recycled aggregate No. 6-20 has larger granularity, the lower permeable layer is prepared by taking the recycled aggregate as a main material, after the molding and sintering, because the composite structure recycled aggregate has the abrasive and the bonding agent and the pore structure, and coarse recycled aggregate particles in the 6-20# granularity section are not compactly stacked, more pores are left, and the special ceramic bonding agent accounting for 10-12% of the main material is added to shrink when being sintered, so that the pores between aggregates are not sufficiently filled, and the added temporary binder dextrin powder accounting for 2-3 percent of the total mass of the main material and the added wetting agent dextrin liquid accounting for 2-5 percent of the total mass of the main material play an auxiliary role of wetting the molding material and helping the molding material to be bonded together during compression molding, meanwhile, as the main component of the porous brick is a non-toxic starch organic matter which can be burned out at high temperature, a plurality of tiny air pore structures are left in the porous brick body after the burning out. The higher porosity of the lower permeable layer enables the permeable brick to have better water permeability, hydrophobicity and water retention.

The invention has the beneficial effects that:

the sintered water permeable brick adopts process waste products or unqualified products of a grinding tool manufacturing enterprise, waste residues turned by the grinding tool processing and waste ceramic grinding tools used by a user enterprise as raw materials, the raw materials are crushed and screened by a jaw crusher, a double-roller crusher and the like to obtain regenerated aggregates with different granularities, the regenerated aggregates are used as aggregate main materials of the sintered water permeable brick, the aggregate main materials are opened up for producing the sintered water permeable brick, the occupation of the warehouse area of the grinding tool manufacturing enterprise or the user enterprise is reduced to a certain extent from the viewpoint of consuming the waste ceramic grinding tools, the operation cost is reduced, and on the other hand, the regenerated aggregate sintered water permeable brick is developed Green, low carbon and energy-saving, and has higher economic and social values and good ecological environmental benefits.

The sintered water permeable brick is roasted at the temperature of 1000 ℃ and 1100 ℃, so that the sintered water permeable brick has excellent strength, hardness and frost resistance and good durability;

the sintered water permeable brick uses the waste ceramic grinding tool to regenerate the aggregate with the composite structure, because the aggregate with the composite structure regenerated by the waste ceramic grinding tool has a large number of micropores, and the connecting part of the formed and sintered aggregate with the waste ceramic grinding tool through the bonding agent bridge also has a large number of micropores, the water permeable brick has good water permeability, water absorption and water retention, and the ground of the sintered water permeable brick applied by correct construction is not easy to cause water accumulation under the condition of heavy rainfall;

furthermore, a large number of fine air holes of the upper filtering permeable layer can filter and adsorb harmful substances such as organic matters, impurities, heavy metals and the like in the surface runoff rainwater, thereby being beneficial to ecological environmental protection;

furthermore, a large number of air holes distributed on the brick body have the function of a miniature reservoir, rainwater can be stored, the water permeable brick has certain water storage, water retention and water slow release performances, and animals, plants and microorganisms near the ground paved by the water permeable brick can be nourished by the reserved water vapor, so that ecological balance is facilitated.

In order to ensure the strength, the floor tiles are usually designed into solid water permeable tiles, and the cost of raw materials and firing energy consumption in the production process is high. The invention adopts the blind hole design structure, comprehensively considers the strength and the durability of the blind hole, designs the size and the layout of the blind hole on the whole, improves the water permeable function without influencing the whole paving effect, ensures that the blind hole of the water permeable brick faces downwards when the brick is used for conventional paving, has a flat, continuous and integrated upper surface, and does not have the defects of influencing the ground flatness, being not beneficial to cleaning, filtering rainwater and influencing the walking flatness when the brick bodies with holes, grooves and the like on the surface are paved on the ground. The sintered water permeable brick with the blind holes can achieve a good water permeable effect, is good in freezing resistance and durability and strength, is beneficial to material saving and energy saving, and can achieve a paving effect of a sponge city well. And moreover, the high-performance sintered water permeable brick prepared from the industrial solid waste recycled aggregate can well absorb solid waste resources, and has the social effects of protecting environment, saving non-renewable natural raw material resources, saving and utilizing rainwater resources and improving the urban ecological environment.

Drawings

FIG. 1 is a flow chart of the process for preparing the water permeable brick of the present invention;

FIG. 2 is a schematic view of the structure of the water permeable brick of the present invention, wherein:

(a) the method comprises the following steps of (1) normally paving, sintering a composite blind hole with a top surface below an upper surface, sintering a permeable brick, sintering a composite blind hole with a bottom surface below an upper surface, sintering a permeable brick with a bottom surface below an upper surface, sintering a permeable brick profile structure with a bottom surface below an upper surface, filtering a permeable layer on the upper part of a brick body, filtering a permeable layer on the lower part of the brick body, and 3-blind holes.

FIG. 3 is a schematic view of the microstructure of the water permeable brick of the present invention, wherein:

4-internal abrasive particles (corundum, silicon carbide and the like) of the recycled aggregate, 5-internal air holes of the recycled aggregate, 6-internal bond bridges of the recycled aggregate, and 7-bond bridges among recycled aggregate particles in the recycled aggregate permeable brick tissue; 8-air holes between the recycled aggregate particles and the bonding agent bridges in the recycled aggregate permeable brick tissues.

FIG. 4 is a morphology of the recycled aggregate of the present invention.

Detailed Description

To better explain the objects, technical solutions and advantages of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and examples. The drawing illustrations and examples described are only intended to illustrate the invention and do not limit the scope of application of the invention.

Example 1

As shown in figure 2, the water permeable brick of the invention is a composite brick, which consists of a sintered water permeable brick body and blind holes (3), wherein the brick body consists of an upper water permeable filtering layer (1) and a lower water permeable filtering layer (2), the blind holes (3) are uniformly distributed in a middle and lower basal body of the brick body along the central line of the bottom surface of the brick along the long edge direction, the hole openings of the blind holes (3) are downward, and the blind ends of the holes are positioned at the positions which are about 20 to 30 percent of the thickness of the brick and are downward from the top surface of the brick where the upper water permeable filtering layer (1) is positioned.

The blind holes are preferably 2-3 and are round holes, the sum of the diameters of the holes is about 0.6 time of the long edge of the bottom surface of the brick, and the depth of each blind hole is 70-80% of the thickness of the brick.

The composite brick is designed into 2 products, namely, the composite brick is a composite structure brick with different microstructures, wherein the upper filtering permeable layer (1) and the lower permeable layer (2) are made of molding materials with different colors and different aggregate granularities; the second is a composite brick with different microstructures, wherein the upper filtering permeable layer (1) and the lower permeable layer (2) are made of molding materials with the same color and different aggregate particle sizes.

The thickness ratio of the upper filtering permeable layer to the lower permeable layer is 1: 7.

The aggregate used by the upper layer of the permeable filtering layer is smaller than the aggregate used by the lower layer of the permeable filtering layer, and the aggregate of the main material of the upper and lower layers of the molding materials is preferably 20-30# and 6-20# waste ceramic grinding tool crushed recycled aggregate respectively.

Wherein, the upper filtering permeable layer is formed by mixing the following materials: the weight percentage of each component is calculated,

84 percent of regenerated aggregate crushed by the waste ceramic grinding tool,

10 percent of special ceramic bond,

2 percent of the binder dextrin powder,

3 percent of humectant dextrin liquid,

1% of iron oxide red pigment;

the lower permeable layer is formed by mixing the following materials: the weight percentage of each component is calculated,

the recycled aggregate is crushed by 90 percent by the waste ceramic grinding tool,

6 percent of special ceramic bond,

2 percent of the binder dextrin powder,

the humectant is pasted with 2 percent of liquid.

Wherein, the special ceramic bonding agent adopts a low-temperature bonding agent, and the components are as follows: clay powder 20%, feldspar powder 60%, and boron glass powder 20%. The particle sizes of the clay powder, the feldspar powder and the boron glass powder are 100-320 meshes.

The sintered water permeable brick as shown in figure 1 is prepared by the following steps:

preparing recycled aggregate, namely crushing and screening a waste ceramic grinding tool to prepare the recycled aggregate, and taking the recycled aggregate with the granularity of 6-20# (the grain diameter is 5-0.85 mm) and 20-30# (the grain diameter is 0.85-0.6 mm) for later use;

step (2), calculating and weighing the raw materials of each component: calculating the material feeding amount required by the molding of the upper filtering permeable layer and the lower permeable base layer of each permeable brick according to the specification and the size of the permeable brick, the thickness of the upper filtering permeable layer and the lower permeable layer, and the density and the unit weight of molding materials of the upper filtering permeable layer and the lower permeable layer; the mass of the molding materials required to be prepared in the molding batch is calculated according to the batch of the water permeable bricks to be molded, and the molding materials of the upper filtering water permeable layer and the lower water permeable layer are weighed according to the proportion of the molding materials to prepare raw materials of each component.

Step (3), mixing to form a molding material: and (3) respectively weighing raw materials, and mixing the upper filtering permeable layer and the lower permeable layer molding materials according to the calculation result of the step (2). The weighing, feeding and mixing sequence is that firstly the weighed recycled aggregate is put into a double S-shaped mixing pot, the mixing pot is started to operate, the dextrin liquid is added to moisten the aggregate, after 5min, the special ceramic bonding agent and the dextrin powder are added, the mixing operation is continued for 3min, the iron oxide red pigment is added, the mixing operation is continued for 1min, the mixed molding material is moved out of the stirring pot, sieved and transferred to a molding material box, the ageing mixture is ready for molding, and the rotating speed of the mixer is 200 rad/min.

Step (4), feeding and pressing step by step: respectively weighing the molding materials required by molding the upper filtering permeable layer and the lower permeable base layer of each permeable brick according to the calculation result of the step (2), feeding the molding materials step by step, firstly weighing the molding materials of the upper filtering permeable layer mixed according to the step (3), feeding the molding materials into a brick making mold (the first feeding), combing and scraping, then weighing the molding materials of the lower permeable base layer mixed according to the step (3), feeding the molding materials into the brick making mold (the second feeding), combing and scraping again (the upper filtering permeable layer after the first feeding and scraping can not penetrate through the combing and scraping is noticed when the combing is uniform), then molding and pressing (6.0 MPa) are carried out according to the set pressure, a molding mechanism with the number and the size corresponding to those of the blind holes is arranged at the upper pressure head part of a press during the molding, so that the molded brick blank is presented as a circular blind hole with 2-3 upward openings in the brick body of the top part in the mold, then demoulding, drying and sintering are carried out.

And (5) drying and sintering: and (3) demolding the wet blank formed in the step (4), drying and sintering, wherein the drying temperature is 80 ℃, the temperature is kept for 12 hours, and the sintering temperature curve is 1 #: firstly heating to 420 ℃ at the heating rate of 6 ℃/min, then heating to 1000 ℃ at the heating rate of 5 ℃/min, then preserving heat for 2h, stopping heating, naturally cooling, and cooling to room temperature for discharging.

And (6) inspecting and packaging: and inspecting the blank discharged from the furnace according to the index requirements, and packaging qualified products to obtain a finished product of the sintered water permeable brick.

Example 2

The upper filtering permeable layer is formed by mixing the following materials: the weight percentage of each component is calculated,

81 percent of recycled aggregate crushed by the waste ceramic grinding tool,

12 percent of special ceramic bond,

2 percent of the binder dextrin powder,

3.5 percent of humectant dextrin liquid,

1.5 percent of iron oxide red pigment;

the lower permeable layer is formed by mixing the following materials: the weight percentage of each component is calculated,

87 percent of recycled aggregate is crushed by the waste ceramic grinding tool,

8 percent of special ceramic bond,

2 percent of the binder dextrin powder,

the humectant is pasted with 3 percent of liquid.

Wherein, the special ceramic bonding agent adopts a low-temperature bonding agent, and the components are as follows: clay powder 20%, feldspar powder 60%, and boron glass powder 20%. The particle sizes of the clay powder, the feldspar powder and the boron glass powder are 100-320 meshes.

The thickness ratio of the upper filtering permeable layer to the lower permeable layer is 1: 8.

The preparation process parameters are as follows:

1) the molding pressure is 5 MPa; 2) firing temperature curve is 2 #: firstly heating to 420 ℃ at the heating rate of 6 ℃/min, then heating to 1050 ℃ at the heating rate of 5 ℃/min, then preserving heat for 2h, stopping heating, naturally cooling, and cooling to room temperature to discharge.

The rest is the same as example 1.

Example 3

The upper filtering permeable layer is formed by mixing the following materials: the weight percentage of each component is calculated,

the recycled aggregate is crushed by 80 percent by the waste ceramic grinding tool,

12.5 percent of special ceramic bond,

2 percent of the binder dextrin powder,

4 percent of humectant dextrin liquid,

1.5 percent of iron oxide red pigment;

the lower permeable layer is formed by mixing the following materials: the weight percentage of each component is calculated,

the recycled aggregate is crushed by 85 percent by the waste ceramic grinding tool,

10 percent of special ceramic bond,

2 percent of the binder dextrin powder,

the humectant is pasted with 3 percent of liquid.

Wherein, the special ceramic bonding agent adopts a low-temperature bonding agent, and the components are as follows: clay powder 20%, feldspar powder 60%, and boron glass powder 20%. The particle sizes of the clay powder, the feldspar powder and the boron glass powder are 100-320 meshes.

The thickness ratio of the upper filtering permeable layer to the lower permeable layer is 1: 10.

The preparation process parameters are as follows:

1) the molding pressure is 4 MPa;

2) firing temperature curve is 3 #: firstly heating to 420 ℃ at the heating rate of 6 ℃/min, then heating to 1100 ℃ at the heating rate of 5 ℃/min, then preserving heat for 2h, stopping heating, naturally cooling, and cooling to room temperature to discharge.

The rest is the same as example 1.

According to the specific implementation mode, 3 types of sintered water permeable bricks with different types are manufactured by adjusting different proportions and process parameters, and according to GB/T25993-2010 permeable pavement bricks and permeable pavement slabs and GB/T9966.1-2001 part 1 of the test method of natural facing stones: the detection results of two standards of a compression strength test after drying and water saturation freeze-thaw cycle are as follows:

specification and model of the permeable sintered pavement bricks: 200 x 125 x 55 (mm).

TABLE 1 detection results of the performance of the sintered water permeable bricks

As can be seen from the data in the table above, the performance indexes detected in the examples 1 to 3 all meet the index requirements of national standards, wherein the water permeability coefficient is far higher than the standard value, which indicates that the water permeability is superior. The change of technological parameters such as the dosage of the binder, the forming pressure, the firing temperature and the like can generate great influence on the performance of the product, and the product can be designed according to the performance requirements of the product in production practice, and the optimal formula and technological parameters are preferably selected. Preferably, the sintered water permeable brick prepared in example 2 has better performance.

Compared with cement-based baking-free water permeable bricks which circulate in the current market, the brick has the characteristics of better frost resistance, wear resistance, skid resistance and water permeability, long life cycle, green, rainwater resource saving and utilization, high comprehensive social benefit and the like in the whole life cycle of the brick. Compared with the sintered water permeable brick, the brick has the characteristics of better water permeability, water storage property, material saving, energy saving, waste utilization and the like.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.