阅读说明：本技术 一种树脂混凝土缩缝施工方法 (Resin concrete shrinkage joint construction method ) 是由 徐速 徐斌 尤其 张宇 郑杰 雷明 于 2021-08-16 设计创作，主要内容包括：本发明提供一种树脂混凝土缩缝施工方法。针对现有树脂混凝土路面铺装在温度影响下易于在应力聚集处开裂、凸起等情况,本发明提供一种适用于树脂混凝土路面铺装的缩缝施工方法：对待切缝区域进行放线,使用切缝机进行切缝施工,清除切缝处的粉尘,对切缝处进行清洗,烘干切缝,使用填缝料进行填缝处理。本发明填缝料使用特殊配方,使切缝处防水性能优异,且增强填缝料与树脂混凝土的粘结性能。通过本发明缩缝可以吸收和释放积聚在树脂混凝土路面内的应力,延长路面的使用时间,提高路面的使用性能。(The invention provides a resin concrete shrinkage joint construction method. Aiming at the conditions that the existing resin concrete pavement is easy to crack and bulge at a stress accumulation part under the influence of temperature, the invention provides a contraction joint construction method suitable for paving the resin concrete pavement, which comprises the following steps: paying off a joint cutting area, using a joint cutting machine to perform joint cutting construction, removing dust at the joint cutting position, cleaning the joint cutting position, drying the joint cutting, and using a joint filling material to perform joint filling treatment. The joint filling material disclosed by the invention adopts a special formula, so that the waterproof performance of a joint cutting part is excellent, and the bonding performance of the joint filling material and resin concrete is enhanced. The shrinkage joint can absorb and release the stress accumulated in the resin concrete pavement, prolong the service time of the pavement and improve the service performance of the pavement.)

1. A resin concrete contraction joint construction method is characterized by comprising the following steps:

s10: paying off the area to be cut;

s20: performing joint cutting construction by using a joint cutting machine according to paying off;

s30: removing dust from the cutting seams;

s40: cleaning the cutting seams;

s50: drying the cutting seams;

s60: and (5) performing joint filling treatment on the joint cutting by using a joint filling material.

2. The resin concrete contraction joint construction method according to claim 1, wherein the area to be slit comprises a resin concrete pavement being cast and cured, and a resin concrete pavement after the passage.

3. The method as claimed in claim 2, wherein the surface of the resin concrete slab is modified with polyurethane.

4. The resin concrete contraction joint construction method according to claim 1, wherein the deformation capacity value of the joint-cutting area is smaller than the product value of the maximum deformation capacity and the coefficient of the road surface.

5. The method for constructing a resin concrete contraction joint according to claim 1, wherein dust removal is performed using a high pressure air gun in step S30.

6. The method as claimed in claim 1, wherein the step S40 is performed by cleaning with a high pressure water gun.

7. The method as claimed in claim 1, wherein the joint compound comprises a sealant or polyurethane.

8. The method for constructing a resin concrete contraction joint according to any one of claims 1 to 7, wherein the caulking process is performed within 6 hours after completion of the step S50.

9. The method for constructing a resin concrete contraction joint according to any one of claims 1 to 7, wherein the drying in the step S50 includes drying by a dryer and natural air drying.

10. The method for constructing a resin concrete contraction joint according to any one of claim 9, wherein the width of the joint cut in the step S20 is 2mm to 10mm, and the depth of the joint cut is 1/4 to 1/2 of the thickness of the resin concrete layer.

Technical Field

The invention relates to the field of pavement paving, in particular to a resin concrete shrinkage joint construction method.

Background

With the increasing application range of resin concrete, the related technology of resin concrete is also continuously explored and developed. During the construction of conventional cement concrete pavement, the cement concrete has significant shrinkage phenomena, such as plastic shrinkage caused by hydration reaction before final setting, carbonization shrinkage of concrete surface, drying shrinkage caused by capillary water diffusion in the cement concrete, and temperature shrinkage caused by temperature reduction, which all affect the use of the cement concrete. Although the resin concrete mixture has low water content, no hydration reaction and no obvious shrinkage, the temperature still influences the use of the resin concrete.

Under the condition of low temperature, tensile stress is generated in the resin concrete, when the tensile stress is accumulated in the resin concrete and can not be effectively eliminated, the accumulated stress can enable irregular cracks to be generated on the surface of the resin concrete, so that the normal use of the resin concrete pavement is influenced, the cracks can be continuously diffused under the action of the stress, and huge risks are caused to the driving safety.

Disclosure of Invention

Therefore, in view of the above problems, the present invention provides a method for constructing a shrinkage joint in a resin concrete, wherein the shrinkage joint is arranged to effectively reduce the generation of tensile stress, and when a resin concrete pavement is damaged in extreme weather, the shrinkage joint can prevent the diffusion of cracks, thereby reducing the influence of the damage to the pavement caused by the tensile stress.

The invention provides a resin concrete shrinkage joint construction method, which comprises the following steps:

s10: paying off the area to be cut;

s20: performing joint cutting construction by using a joint cutting machine according to paying off;

s30: removing dust from the cutting seams;

s40: cleaning the cutting seams;

s50: drying the cutting seams;

s60: and (5) performing joint filling treatment on the joint cutting by using a joint filling material.

The effect that adopts this technical scheme can reach is as follows: the method is characterized in that the approximate position of the resin concrete pavement needing the joint cutting is selected, and the line can be paid out according to the drawing or the design requirement, so that the position needing the joint cutting is accurately determined. Also can carry out the unwrapping wire according to the road surface in service behavior of difference, the traffic flow is big, easily damaged road surface can suitably reduce the distance of joint-cutting, reduces the diffusion of crack, and the later stage of being convenient for is maintained the road surface according to the size of joint-cutting, and if the overall environment that the road surface used is better, reduces the joint-cutting, increases the distance between the joint-cutting, reduces the damage of joint-cutting itself to resin concrete pavement.

After the position of the cutting seam is determined, a cutting seam machine is used for cutting seam construction, the depth and the width of the cutting seam are designed and selected according to the specific condition of the road surface, the depth and the width can be increased for the area subjected to larger tensile stress or the thick road surface paved by the resin concrete, and if the constructed resin concrete road surface is thinner and subjected to larger tensile stress, the depth can be properly reduced, and the width can be increased. Because the damage of the pavement deep layer is difficult to repair, the depth is required to be not larger than 1/2 of the whole pavement as far as possible during cutting, and the damage to the pavement deep layer is avoided.

After the joint-cutting construction is completed, resin concrete powder left by cutting and residual broken stone particles on the road surface can be remained in the joint-cutting, if the joint-cutting construction is directly cleaned, the resin concrete powder can be agglomerated or be mud-shaped, larger impact force is used, but the dust is removed before cleaning, and only residual extremely small amount of dust and broken stone particles are removed in the subsequent cleaning process.

The cleaning usually uses water or an aqueous solution containing a cleaning function, and therefore, after the cleaning is completed, the slit needs to be dried to prevent the residual water or the aqueous solution from affecting the adhesion of the joint compound.

The arrangement of the contraction joints on the resin concrete is mainly characterized by the configuration and the selection of joint filling materials, because the existence of the joint filling materials damages the resin concrete pavement, if the joint filling treatment is not carried out, the friction and other actions in the driving process can deepen the depth and the width of the joint filling materials, cracks are formed, and the driving safety is influenced. After the joint filling material is used for joint filling treatment, no gap exists on the surface of the resin concrete pavement, and the joint filling material can prevent the deepening and widening of a cutting seam from fundamentally damaging the pavement of a roadside. The joint sealing material with excellent performance generally has both waterproof performance and bonding performance, the waterproof performance can reduce rainwater from permeating into a gap between a joint cutting and the joint sealing material, the joint sealing material is prevented from being detached, and the waterproof performance can also reduce the absorption of moisture of the joint sealing material and keep good bonding performance. The cohesiveness is mainly shown in the process of the expansion and contraction of the cutting seam and the like, and the resin concrete on two sides is kept from excessive deformation. The arrangement of the contraction joint can effectively reduce the generation of the tensile stress in the resin concrete, and when the tensile stress in the resin concrete pavement is accumulated, the tensile stress can be transmitted to the contraction joint for releasing. When the tensile stress is continuously accumulated and the crack is accumulated to an extreme value at the contraction joint, the crack is generated at the contraction joint, generally deepens and widens along the cutting joint, but the irregular crack is not directly generated on the surface of the resin concrete pavement. Because the cutting seam has transverse cutting and vertical cutting, the generated crack can not be diffused in an uncontrolled way, and the growth can be stopped at the junction of the transverse cutting seam and the vertical cutting seam. Therefore, the arrangement of the contraction joints can reduce the diseases of the resin concrete pavement, the driving safety is ensured to a certain extent by forming regular cracks, the pavement can be repaired according to the cutting joints, and the repairing time and the material cost are reduced.

Further, the area to be cut comprises the resin concrete pavement which is being cast and cured and the resin concrete pavement after the passage.

The effect that adopts this technical scheme can reach is as follows: due to the flexibility and the crack resistance of the resin concrete pavement, the requirement on the time of cutting is not high, and the cutting can be performed as long as the resin concrete pavement is finished under the normal condition. The strength and toughness of the resin concrete pavement which is being poured and cured are not in the optimal state, the requirement on the cutting strength of a cutting joint machine is not very high during cutting joint construction, but the cutting joint machine cannot be too heavy due to insufficient strength and toughness of the resin concrete pavement, and the too heavy cutting joint machine can cause deep damage to the resin concrete pavement. The condition that the resin concrete pavement after the passage is subjected to cutting is mainly found on the pavements with increased traffic volume and changed driving environment. When the resin concrete pavement is used for a period of time after the vehicle is started, the strength and the toughness of the completely cured resin concrete pavement are higher, so that certain requirements are met on the cutting strength of the joint cutter.

Further, the resin concrete pavement is modified by polyurethane.

The effect that adopts this technical scheme can reach is as follows: after the resin concrete is modified by polyurethane, the drainage, waterproof performance and cohesiveness of the resin concrete are obviously improved, the toughness is enhanced, and the capability of processing the tensile stress inside the resin concrete pavement is improved to a certain extent, so that when the depth and the width of a kerf are designed, the kerf with shallow depth and narrow width can be selected. The shallow cutting seam does not damage the deep part of the resin concrete pavement, the shallow pavement can be dug and re-paved, the requirement of the shallow cutting seam on the caking property of the joint filling material can be correspondingly reduced, and some joint filling materials with better waterproof performance can be selected. After the width of the kerf is reduced, the requirement for the cohesiveness of the joint compound is reduced, and the stress on the kerf is reduced. The polyurethane modified resin concrete pavement has the advantages that the joint filling treatment is carried out before the polyurethane modified resin concrete is not cured, the pavement is better bonded with joint filling materials, the joint filling materials can even generate chemical bonds with the joint filling materials, and the performances in the aspects of strain resistance, low-temperature stability and water resistance are obviously improved.

Further, the joint cutter is resin concrete joint cutter, and the number of times of joint cutting is 1 ~ 5 times.

The effect that adopts this technical scheme can reach is as follows: the resin concrete has high strength and great cutting difficulty, the conventional joint cutter can only cut the resin concrete before curing, and the resin concrete joint cutter is needed for the resin concrete after curing or later repairing. The multiple cutting seams can prevent the stress from being completely released at one position and prevent the crack from spreading.

Further, the self deformability value of the to-be-cut seam area is smaller than the product value of the maximum road surface deformability and the coefficient.

The effect that adopts this technical scheme can reach is as follows: by arranging the contraction joint, irregular cracks can not occur on the resin concrete pavement layer, the service life is expected to be prolonged by 3-5 years, but if the cohesion of the resin concrete is insufficient, the resin concrete is easy to peel off, edges and corners are easy to fall after the joint is cut, and the service life of the resin concrete pavement layer is shortened on the contrary. Before the resin concrete pavement layer engineering under given conditions is implemented, the use conditions of the resin concrete can be calculated. The deformation range of the resin concrete pavement structure layer is calculated through mechanical analysis of the whole structure layer, the influences of other factors including temperature deviation and the like except stress are considered, the deformation range is subjected to amplification of a safety coefficient according to experience, and the amplified data is compared with the deformation capacity of the resin concrete material. If the front value is larger than the rear value, the contraction joint is set properly, otherwise, the contraction joint is not set.

Further, the dust is removed using a high pressure air gun in step S30.

The effect that adopts this technical scheme can reach is as follows: the high-pressure air gun can efficiently remove dust generated in the cutting process, and the dust pollution and the difficulty of later-stage cleaning are reduced.

Further, in step S40, a high-pressure water gun is used for cleaning.

The effect that adopts this technical scheme can reach is as follows: the high-pressure water gun has larger impact pressure compared with the common water gun, can wash out the residue in the fine joint, increases the contact area of the joint filling material and the resin concrete, has better cleaning effect and more sufficient cleaning, is favorable for the bonding of the subsequent joint filling material and the resin concrete pavement, and leads the joint filling material to be more tightly bonded with the resin concrete pavement.

Further, the joint compound comprises a sealant and polyurethane.

The effect that adopts this technical scheme can reach is as follows: the sealant has good waterproof performance and certain cohesiveness; the polyurethane can strengthen the bonding strength of the joint compound and the resin concrete, reduce the porosity of the joint compound, further improve the waterproof performance of the joint compound, enhance the toughness of the joint compound and improve the capability of processing the tensile stress inside the resin concrete pavement to a certain extent. Therefore, after the joint filling material is subjected to joint filling treatment, no gap exists on the surface of the resin concrete pavement, and the joint filling material has both waterproof performance and bonding performance, so that the joint filling material is not easy to fall off and has durability.

Further, the caulking process is performed within 6 hours after completion of step S50.

The effect that adopts this technical scheme can reach is as follows: after the joint seams are cleaned, in order to prevent dust, sand and stone particles and the like from entering the joint seams and influencing the joint filling effect, the joint filling operation should be carried out as soon as possible after the joint seams are dried, so that the bonding effect of the joint filling material and the resin concrete pavement is further enhanced, the bonding strength is improved, the construction time is shortened, and the construction efficiency is improved.

Further, the drying in step S50 includes drying in a dryer and natural drying.

The effect that adopts this technical scheme can reach is as follows: the drying method is adjusted according to specific conditions, and under the condition of poor weather conditions or large wind sand, the drying machine can be used for drying, and the joint compound can be laid while drying. Under the condition of higher weather temperature, the air-drying can be carried out naturally, and the interference of dust and gravel is reduced. The drying process is easy to operate, and high in practicality and universality. The joint filling material is suitable to be added in a dry environment, so that the influence of moisture on the adhesion of the joint filling material is prevented, the joint cutting is dried, the adhesion of the joint filling material and resin concrete is facilitated, and the adhesion strength is enhanced.

Further, in the step S20, the width of the cutting seam is 2 mm-10 mm, and the depth of the cutting seam is 1/4-1/2 of the thickness of the resin concrete layer.

The effect that adopts this technical scheme can reach is as follows: the width of the cutting seam is controlled to reduce the stress on the resin concrete layer at the bottom of the cutting seam, and the depth of the cutting seam is controlled to achieve the best stress reduction effect on the premise that the performance of the resin concrete layer is not affected. Because the damage to the pavement deep layer is difficult to repair, the depth of the cut is required to be not larger than 1/2 of the whole pavement as far as possible, the damage to the pavement deep layer is avoided, the width and the depth of the cut are controlled, the crack can be prevented from being diffused, and the pavement safety can be improved on the whole.

In summary, the above embodiments of the present application may have one or more of the following advantages or benefits:

(2) the joint filling material has certain waterproof performance and good cohesiveness with resin concrete, so that the influence of rainwater weather on the performance of the contraction joint can be reduced, and the contraction joint is kept at the designed width and depth.

(3) The invention can be used for construction and maintenance of the resin concrete pavement under various conditions, and has wider application range and application prospect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

FIG. 1 is a schematic view of a resin concrete shrinkage joint provided by the present invention.

FIG. 2 is a flow chart of the construction process of the resin concrete shrinkage joint provided by the invention.

Description of reference numerals:

1-joint compound filling; 2-resin concrete.

[ example 1 ]

As shown in fig. 1 and fig. 2, the embodiment provides a method for constructing a resin concrete shrinkage joint, which includes the following steps:

s10: according to the use condition of the pavement, paying off is carried out on the area to be cut, the width of the cut is designed to be 2-4mm, and the depth is 1/4 of the thickness of the whole resin concrete. The method comprises the steps of detecting the deformation capacity of the whole pavement before setting the shrinkage joint to obtain the maximum value of the deformation capacity of the whole pavement of 700 mu epsilon, setting the amplification coefficient of the same paved pavement to be 3, setting the product value of the maximum value of the deformation capacity of the pavement and the coefficient to be 2100 mu epsilon, setting the self deformation capacity value of the to-be-cut-off area of the shrinkage joint to be 2000 mu epsilon and smaller than 2100 mu epsilon, and setting the shrinkage joint. The depth of the cutting is less than 1/2 of the whole pavement, which is beneficial to protecting the deep pavement. For the road surface of the resin concrete after being modified by polyurethane, the drainage, waterproof performance and caking property of the resin concrete are obviously improved, the toughness is enhanced, and the capability of processing the tensile stress inside the resin concrete pavement is improved to a certain extent, so that when the depth and the width of a cutting seam are designed, the cutting seam with shallower depth and narrower width can be selected. The shallow cutting seam does not damage the deep part of the resin concrete pavement, the shallow pavement can be dug and re-paved, the requirement of the shallow cutting seam on the caking property of the joint filling material can be correspondingly reduced, and some joint filling materials with better waterproof performance can be selected. After the width of the kerf is reduced, the requirement for the cohesiveness of the joint compound is reduced, and the stress on the kerf is reduced. The polyurethane modified resin concrete pavement has the advantages that the joint filling treatment is carried out before the polyurethane modified resin concrete is not cured, the pavement is better bonded with joint filling materials, the joint filling materials can even generate chemical bonds with the joint filling materials, and the performances in the aspects of strain resistance, low-temperature stability and water resistance are obviously improved.

S20: and (4) performing joint cutting construction by using a joint cutter. For the newly poured resin concrete pavement, before the resin concrete pavement is not completely cured or reaches a certain strength, a conventional joint cutter can be used for cutting a joint to a designed depth at one time; and (3) for the old or cured resin concrete pavement, a mode of cutting for 2-5 times in a grading manner is adopted, and a resin concrete joint cutter is used until all the shrinkage joints are cut to the designed depth, so that the existing shrinkage stress in the concrete can be prevented from being completely released at one joint.

S30: and (5) using a high-pressure air gun to remove dust at the cutting seams. The dust is removed before cleaning, so that the resin concrete powder can be prevented from caking or being mud-shaped, and only a small amount of residual dust and broken stone particles are removed during subsequent cleaning.

S40: and cleaning the cutting seams by using a high-pressure water gun. And cleaning with clear water. The high-pressure water gun has larger impact pressure compared with the common water gun, can wash out the residue in the fine joint, increases the contact area of the joint filling material and the resin concrete, has better cleaning effect and more sufficient cleaning, is favorable for the bonding of the subsequent joint filling material and the resin concrete pavement, and leads the joint filling material to be more tightly bonded with the resin concrete pavement.

S50: and drying the cut seams by using a dryer so as to dry the cut seams. After the joint seams are cleaned, in order to prevent dust, sand and stone particles and the like from entering the joint seams and influencing the joint filling effect, the joint filling operation should be carried out as soon as possible after the joint seams are dried, so that the bonding effect of the joint filling material and the resin concrete pavement is further enhanced, the bonding strength is improved, the construction time is shortened, and the construction efficiency is improved.

S60: and performing caulking treatment by using the prepared caulking material containing polyurethane. The joint filling material containing polyurethane has both waterproof performance and bonding performance, the waterproof performance can reduce rainwater from permeating into gaps between the joint cuts and the joint filling material, the joint filling material is prevented from being taken off and loaded, the waterproof performance can also reduce the moisture absorption of the joint filling material, good bonding performance is kept, and the bonding performance is mainly shown in the process that the joint cuts stretch under stress and the like, and the resin concrete on two sides is kept from excessively deforming.

The joint compound test data are shown in table 1:

table 1 joint compound test data

Test items	Unit of	Test results	Test method
				Adhesive strength	MPa	0.5	GB/T 13477.8
Coefficient of water permeability	mL/min	Substantially free of water penetration	T 0971

As can be seen from the table 1, the joint filling material has high bonding strength, basically has no water seepage, good waterproof performance, can prevent the crack from spreading after the crack shrinkage, has good joint filling effect and can ensure the normal use of the subsequent resin concrete pavement.

[ example 2 ]

As shown in fig. 1 and fig. 2, the embodiment provides a method for constructing a resin concrete shrinkage joint, which includes the following steps:

s10: according to the use condition of the pavement, paying off is carried out on the area to be cut, the width of the cut is 4.2-6.3mm, and the depth is 3/7 of the thickness of the whole resin concrete.

S20: before the resin concrete pavement is not completely cured or reaches a certain strength, a resin concrete joint cutter is used for cutting to the designed depth at one time.

S30: and (5) using a high-pressure air gun to remove dust at the cutting seams.

S40: and cleaning the cutting seams by using a high-pressure water gun.

S50: and drying the cut seams by using a dryer so as to dry the cut seams.

S60: and performing caulking treatment by using the prepared caulking material.

The method comprises the steps of detecting the deformation capacity of the whole pavement before setting the shrinkage joint to obtain the maximum value of the deformation capacity of the whole pavement of 800 mu epsilon, wherein for the same pavement, the amplification coefficient is 4, the product value of the maximum value of the deformation capacity of the pavement and the coefficient is 3200 mu epsilon, and the deformation capacity value of the pavement to be cut in the region where the shrinkage joint is set is 3000 mu epsilon and is less than 3200 mu epsilon, so that the shrinkage joint can be set. If the area to be cut of the shrinkage joint is set, the deformation capacity value of the area is more than 3200 mu epsilon, namely, the shrinkage joint cannot be set.

[ example 3 ]

As shown in fig. 1 and fig. 2, the embodiment provides a method for constructing a resin concrete shrinkage joint, which includes the following steps:

s10: according to the use condition of the pavement, paying off is carried out on the area to be cut, the width of the cut is designed to be 6.4-8.1mm, and the depth of the cut is 5/11 of the thickness of the whole resin concrete.

S20: the cured resin concrete pavement is cut 3 times by using a resin concrete joint cutter in a mode of cutting for several times until all the shrinkage joints are cut to the designed depth, so that the existing shrinkage stress in the concrete can be prevented from being completely released at one joint.

S30: and (5) using a high-pressure air gun to remove dust at the cutting seams.

S40: and cleaning the cutting seams by using a high-pressure water gun.

S50: and drying the cut seams by using a dryer so as to dry the cut seams.

S60: and performing caulking treatment by using the prepared caulking material.

[ example 4 ]

As shown in fig. 1 and fig. 2, the embodiment provides a method for constructing a resin concrete shrinkage joint, which includes the following steps:

s10: according to the use condition of the pavement, paying off is carried out on the area to be cut, the width of the cut is 8.2-9.8mm, and the depth is 6/13 of the thickness of the whole resin concrete.

S20: for the resin concrete pavement used for a period of time, a mode of cutting is adopted for 5 times by using a resin concrete joint cutter until all the contraction joints are cut to the designed depth, so that the existing contraction stress in the concrete can be prevented from being completely released at one joint.

S30: and (5) using a high-pressure air gun to remove dust at the cutting seams.

S40: and cleaning the cutting seams by using a high-pressure water gun.

S50: and drying the cut seams by using a dryer so as to dry the cut seams.

S60: and performing caulking treatment by using the prepared caulking material.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.