Expansion post-cast strip structure and construction method thereof
By adopting composite functional layers and multi-layer waterproofing systems in the expansion post-pouring tape structure, the problems of limited traditional waterproofing effects and insufficient durability are solved, and more efficient waterproofing performance and longer service life are achieved.
Patent Information
- Application Number
- CN202510128891.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2025-03-28
AI Technical Summary
The traditional post-expansion cast belt structure relies on a single waterproof layer or simple material, and has limited waterproofing effect, making it difficult to deal with the slight deformation and cracks of the concrete structure, and lacks mechanical strength and durability, making it difficult to resist the erosion and wear of the external environment.
The expanded post-pouring strip structure of the composite functional layer is adopted, including the post-pouring strip waterproof treatment layer, epoxy resin layer, leakage plugging layer and carbon fiber cloth layer, combined with the non-cured rubber asphalt waterproof coating layer and the upper return water stop sill, a multi-layer waterproof system is formed to enhance waterproof performance and durability.
It significantly improves the waterproof performance and durability of the rear casting tape, can effectively resist slight deformation and cracks of the concrete structure, extends the service life of the structure, reduces maintenance costs, and ensures good waterproof performance during long-term use.
Smart Images
Figure CN119711655A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of garage roof post-cast strip construction, and in particular to an expansion post-cast strip structure and a construction method thereof. Background Art
[0002] With the continuous development of construction projects, concrete pouring technology is also constantly improving. In order to solve the problem of cracks caused by shrinkage and temperature stress during the pouring of large-volume concrete, post-cast strips (also known as construction joints) came into being. Post-cast strips enable the construction of various parts of the building in stages, effectively controlling the shrinkage and temperature stress of concrete.
[0003] At present, the expansion post-cast strip structure is mainly waterproofed by setting a waterproof layer or using waterproof materials at the post-cast strip. The common practice is to apply waterproof paint or lay a waterproof membrane at the post-cast strip.
[0004] However, traditional expansion joints mostly rely on a single waterproof layer or simple waterproof materials, with limited waterproof effects, and are difficult to cope with slight deformations and cracks in concrete structures. In addition, existing waterproof systems lack mechanical strength and durability, and cannot effectively resist long-term erosion and mechanical wear from the external environment, causing the waterproof layer to be easily damaged. Summary of the invention
[0005] The main purpose of the invention is to provide an expansion post-cast strip structure and a construction method thereof, aiming to improve the waterproof performance of the post-cast strip and enhance the structural durability of the post-cast strip.
[0006] To achieve the above-mentioned purpose, the expansion post-casting strip structure proposed by the present invention comprises:
[0007] A garage roof, wherein the garage roof is provided with a post-cast zone;
[0008] A concrete top plate, the concrete top plate is arranged on the garage top plate; the concrete top plate comprises a post-cast strip waterproofing layer, an epoxy resin layer, a leak-proofing layer and a carbon fiber cloth layer, the post-cast strip waterproofing layer is attached to the post-cast strip interval, the epoxy resin layer covers the surface of the post-cast strip waterproofing layer, the leak-proofing layer is coated on the epoxy resin layer, and the carbon fiber cloth layer covers the leak-proofing layer;
[0009] Two upper return water stop sills, two upper return water stop sills are respectively arranged on both sides of the concrete top plate;
[0010] A non-curing rubber asphalt waterproof coating layer, wherein the non-curing rubber asphalt waterproof coating layer covers the outside of the concrete top plate and the upper return water stop sill.
[0011] In one embodiment, the chemical composition of the epoxy resin layer includes an epoxy group and a hardener, and the ratio of the epoxy group to the hardener is 2:1 to 4:1.
[0012] In one embodiment, the chemical composition of the epoxy resin layer further includes nano-silicon dioxide particles, and the added amount of the nano-silicon dioxide is 1% to 3% of the total amount of the epoxy group and the hardener.
[0013] In one embodiment, the chemical composition of the plugging layer includes silicate cement, micro-expansion agent and plasticizer, the plasticizer is added in an amount of 2% to 5% of the total amount of the silicate cement, and the micro-expansion agent is added in an amount of 0.5% to 1% of the total amount of the silicate cement.
[0014] In one embodiment, the carbon fiber cloth layer comprises a weather-resistant polyurethane coating and a carbon fiber filament layer, the weather-resistant polyurethane coating is coated on the surface of the carbon fiber filament layer, and the thickness of the weather-resistant polyurethane coating is 5% to 10% of the thickness of the carbon fiber filament layer braided layer.
[0015] In one embodiment, the chemical composition of the non-curing rubber asphalt waterproof coating layer includes rubber powder, asphalt and a tackifier, the ratio of the rubber powder to the asphalt is 1:2 to 1:3, and the added amount of the tackifier is 5% to 10% of the total amount of the rubber powder and the asphalt.
[0016] In one embodiment, the chemical composition of the non-curing rubber asphalt waterproof coating layer further includes nano zinc oxide, and the added amount of the nano zinc oxide is 0.5% to 1% of the total amount of the rubber powder, the asphalt and the tackifier.
[0017] The present invention also provides a method for constructing an expansion post-casting strip structure, which is used to form the expansion post-casting strip structure as described above. The method for constructing the expansion post-casting strip structure comprises:
[0018] Performing waterproof reinforcement treatment on the post-cast zone section on the garage roof in advance to form a post-cast zone roof;
[0019] Thicken the concrete at the top plate of the post-cast zone by 20 mm and make it into an inclined surface so that the structural surface of the top plate of the post-cast zone is higher than the roof plate of the garage around the post-cast zone;
[0020] The post-cast strip waterproofing treatment layer is laid on the surface of the post-cast strip top plate in the post-cast strip interval, an epoxy resin layer is evenly brushed or sprayed on the post-cast strip waterproofing treatment layer, a plugging layer is coated on the cured epoxy resin layer, and the carbon fiber cloth layer is laid on the plugging layer to form the concrete top plate;
[0021] An upper return water stop is provided on each side of the concrete top plate;
[0022] The non-curing rubber asphalt waterproof coating is uniformly coated on the outside of the carbon fiber cloth layer and the upper return water stop to form the non-curing rubber asphalt waterproof coating layer to obtain the expansion post-casting strip structure.
[0023] In one embodiment, before the step of providing one upper return water stop on each side of the concrete top plate, the expansion post-casting strip structure construction method further includes:
[0024] A groove is chiseled at the junction of the concrete top plate and the post-cast strip top plate to form a transition groove; the transition groove is a V-shaped structure.
[0025] In one embodiment, before the step of providing one upper return water stop on each side of the concrete top plate, the expansion post-casting strip structure construction method further includes:
[0026] A base treatment agent is applied to the construction joints of the concrete top plate to perform waterproof reinforcement treatment.
[0027] The technical solution of the present invention reduces the influence of the small deformation and cracks of the concrete structure on the waterproof performance and durability of the post-casting strip through the expansion post-casting strip structure with a composite functional layer. The post-casting strip waterproofing treatment layer is directly attached to the post-casting strip interval of the garage roof, providing a solid foundation for the expansion post-casting strip structure. The epoxy resin layer is evenly covered on the post-casting strip waterproofing treatment to form a uniform and continuous waterproof layer, which effectively closes the small cracks. The plugging layer further enhances the sealing effect of the post-casting strip waterproofing treatment, while the carbon fiber cloth layer increases the mechanical strength of the entire system to prevent leakage caused by physical damage. In addition, the upper return water stop on both sides of the concrete top plate is used to increase the overall waterproof height and prevent lateral penetration of water. The non-curing rubber asphalt waterproof coating layer provides an additional waterproof protective layer, covering the entire concrete top plate and the upper return water stop, which can adapt to the small deformation of the structure and further reduce the risk of waterproof leakage caused by crack expansion. Not only does it extend the service life of the expansion post-casting strip structure, but it also reduces the maintenance cost, and can ensure that the expansion post-casting strip structure maintains good waterproof performance during long-term use, thereby protecting the main structure from water damage and ensuring its safety and functionality. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0029] Figure 1A schematic diagram of a top view of an expansion post-cast strip structure according to an embodiment of the present invention;
[0030] Figure 2 A schematic structural diagram of an embodiment of a concrete top plate provided by the present invention;
[0031] Figure 3 A schematic diagram of a process flow of an embodiment of a method for constructing an expansion post-cast strip structure provided by the present invention;
[0032] Figure 4 for Figure 3 A schematic diagram of a flow chart of an embodiment before step S40;
[0033] Figure 5 For the picture Figure 3 FIG. 1 is a flow chart of another embodiment before step S40.
[0034] Description of Figure Numbers:
[0035] 100. Garage roof; 101. Post-cast zone; 200. Concrete roof; 300. Upper return water stop; 400. Non-curing rubber asphalt waterproof coating layer; 210. Post-cast zone waterproofing treatment layer; 220. Epoxy resin layer; 230. Leakage-proofing layer; 240. Carbon fiber cloth layer.
[0036] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0040] At present, the expansion post-cast strip structure is mainly waterproofed by setting a waterproof layer or using waterproof materials at the post-cast strip. The common practice is to apply waterproof paint or lay a waterproof membrane at the post-cast strip.
[0041] However, traditional expansion joints mostly rely on a single waterproof layer or simple waterproof materials, with limited waterproof effects, and are difficult to cope with slight deformations and cracks in concrete structures. In addition, existing waterproof systems lack mechanical strength and durability, and cannot effectively resist long-term erosion and mechanical wear from the external environment, causing the waterproof layer to be easily damaged.
[0042] In order to solve the technical problem, the present invention provides an expansion post-casting strip structure and a construction method thereof.
[0043] See also Figure 1 and Figure 2 In one embodiment of the present invention, the expansion post-cast strip structure includes a garage roof 100, a concrete roof 200, a non-curing rubber asphalt waterproof coating layer 400 and two upper return waterstops 300, the garage roof 100 is provided with a post-cast strip section 101; the concrete roof 200 is arranged on the garage roof 100; the concrete roof 200 includes a post-cast strip waterproof treatment layer 210, an epoxy resin layer 220, a plugging layer 230 and a carbon fiber cloth layer 240, the post-cast strip waterproof treatment layer 210 is attached to the post-cast strip section 101, the epoxy resin layer 220 covers the surface of the post-cast strip waterproof treatment layer 210, the plugging layer 230 is coated on the epoxy resin layer 220, and the carbon fiber cloth layer 240 covers the plugging layer 230; two upper return waterstops 300 are respectively arranged on both sides of the concrete roof 200; the non-curing rubber asphalt waterproof coating layer 400 covers the concrete roof 200 and the outer surface of the upper return waterstop 300.
[0044] Specifically, the concrete top plate 200 is arranged on the garage top plate 100, and the concrete top plate 200 is composed of multiple functional layers, including a post-casting tape waterproofing treatment layer 210, an epoxy resin layer 220, a plugging layer 230 and a carbon fiber cloth layer 240. The post-casting tape waterproofing treatment layer 210 is directly attached to the post-casting tape interval 101 of the garage top plate 100, and is bonded by mechanical fixing or adhesive to provide a basis for the subsequent waterproof layer. The epoxy resin layer 220 covers the surface of the post-casting tape waterproofing treatment layer 210, and is evenly covered by brushing or spraying to ensure that there are no bubbles and gaps, and a uniform waterproof layer is formed. The curing time of the epoxy resin layer 220 is adjusted according to the ratio, generally 24 hours. The plugging layer 230 is located outside the epoxy resin layer 220, and the plugging material is evenly coated with a scraper or spraying equipment to ensure complete coverage and close combination with the epoxy resin layer 220. The thickness of the plugging layer 230 is 3 to 5 mm. The carbon fiber cloth layer 240 is covered on the plugging layer 230, and the carbon fiber cloth is laid on the surface of the plugging layer 230, bonded with a special adhesive or epoxy resin, and fully compacted to ensure that there is no gap between the carbon fiber cloth and the plugging layer 230. At the same time, the overlapping part of the carbon fiber cloth layer 240 is not less than 5 cm to ensure continuity and strength.
[0045] Two upper return water stop sills 300 are respectively arranged on both sides of the concrete top plate 200 to raise the concrete top plate 200 and prevent water from penetrating. The upper return water stop sills 300 are usually made of concrete or metal materials, and their height is higher than the concrete top plate 200. They are fixed by embedded parts or bolts to ensure stability.
[0046] The non-curing rubber asphalt waterproof coating layer 400 covers the outside of the concrete top plate 200 and the upper return water stop 300, that is, covers the outside of the carbon fiber cloth layer 240 and the upper return water stop 300. The non-curing rubber asphalt waterproof coating is evenly applied on the carbon fiber cloth layer 240 and the upper return water stop 300 by spraying or brushing, and the coating thickness should be controlled to be 2 to 3 mm to ensure no missing coating and uniform coverage.
[0047] In the technical solution provided by the present invention, the influence of the small deformation and cracks of the concrete structure on the waterproof performance and durability of the post-casting strip is reduced by the expansion post-casting strip structure with a composite functional layer. The post-casting strip waterproofing treatment layer 210 is directly attached to the post-casting strip section 101 of the garage roof 100, providing a solid foundation for the expansion post-casting strip structure. The epoxy resin layer 220 is evenly covered on the post-casting strip waterproofing treatment to form a uniform and continuous waterproof layer, which effectively closes the small cracks. The plugging layer 230 further enhances the sealing effect of the post-casting strip waterproofing treatment, while the carbon fiber cloth layer 240 increases the mechanical strength of the entire system to prevent leakage caused by physical damage. In addition, the upper return water stop 300 on both sides of the concrete top plate 200 is used to increase the overall waterproof height and prevent lateral penetration of water. The non-curing rubber asphalt waterproof coating layer 400 provides an additional waterproof protective layer, covering the entire concrete top plate 200 and the upper return water stop 300, which can adapt to the small deformation of the structure and further reduce the risk of waterproof leakage caused by crack expansion. It not only prolongs the service life of the expansion post-casting structure, but also reduces maintenance costs. It can ensure that the expansion post-casting structure maintains good waterproof performance during long-term use, thereby protecting the main structure from water damage and ensuring its safety and functionality.
[0048] In an embodiment of the present invention, the chemical composition of the epoxy resin layer 220 includes epoxy groups and a hardener, and the ratio of the epoxy groups to the hardener is 2:1 to 4:1.
[0049] Specifically, the ratio of epoxy group to hardener is 2:1 to 4:1, which can balance waterproof performance, mechanical strength and flexibility to better meet the use requirements of the expansion post-casting strip structure.
[0050] As the main component of epoxy resin, epoxy groups can be selected from commonly used epoxy groups such as bisphenol A type and bisphenol F type. These epoxy groups can react chemically with hardeners to form a dense cross-linked structure, providing excellent waterproof performance and mechanical strength. Hardeners can use polyamines, imides, etc.
[0051] In order to further improve the flexibility of the epoxy resin layer 220 to adapt to the slight deformation of the concrete structure, a plasticizer can be added to the epoxy resin layer 220. The ratio of the plasticizer to the epoxy resin is controlled between 1:10 and 1:15, which can improve the flexibility while maintaining the overall performance of the epoxy resin layer 220.
[0052] In an embodiment of the present invention, the chemical composition of the epoxy resin layer 220 further includes nano-silicon dioxide particles, and the added amount of the nano-silicon dioxide is 1% to 3% of the total amount of the epoxy group and the hardener.
[0053] Specifically, when nano-silica particles are added to epoxy resin at a ratio of 1% to 3%, the nano-silica particles can effectively interact with the epoxy resin matrix at a microscopic level, thereby improving the mechanical properties of the expanded post-casting tape structure, and can improve the hardness and wear resistance of the expanded post-casting tape structure, while maintaining or slightly improving the flexibility of the expanded post-casting tape structure.
[0054] More specifically, the nano-silicon dioxide particles are evenly dispersed in the epoxy resin matrix, which can improve the uniformity and stability of the epoxy resin layer 220 and reduce the generation of cracks caused by uneven internal stress of the expanded post-casting strip structure. In addition, the nano-silicon dioxide particles can also improve the compressive strength and impact resistance of the epoxy resin layer 220.
[0055] In an embodiment of the present invention, the chemical composition of the plugging layer 230 includes silicate cement, micro-expansion agent and plasticizer. The amount of plasticizer added is 2% to 5% of the total amount of silicate cement, and the amount of micro-expansion agent added is 0.5% to 1% of the total amount of silicate cement.
[0056] Specifically, as the main component of the plugging layer 230, silicate cement provides basic bonding performance and structural strength, and can form a stable and dense plugging layer 230 on the epoxy resin layer 220, effectively preventing water from penetrating.
[0057] In order to further enhance the sealing performance and adaptability of the plugging layer 230, the addition amount of the micro-expansion agent is controlled at 0.5% to 1% of the total amount of silicate cement, which can produce a tiny expansion effect during the curing process of the plugging layer 230, so that the plugging layer 230 is more closely integrated with the surrounding structure, reducing the occurrence of cracks caused by shrinkage or deformation, thereby improving the sealing and durability of the plugging layer 230.
[0058] The amount of plasticizer added is 2% to 5% of the total amount of silicate cement, and its function is to improve the flexibility and fluidity of the plugging layer 230. The plasticizer can reduce the brittleness of the plugging layer 230, so that it can better adapt to the slight deformation of the concrete structure and reduce the risk of cracks. At the same time, the plasticizer can also optimize the fluidity of the plugging material, making it easier to evenly coat the epoxy resin layer 220 during the construction process, forming a continuous and dense plugging layer 230.
[0059] In an embodiment of the present invention, the carbon fiber cloth layer 240 includes a weather-resistant polyurethane coating and a carbon fiber filament layer. The weather-resistant polyurethane coating is coated on the surface of the carbon fiber filament layer. The thickness of the weather-resistant polyurethane coating is 5% to 10% of the thickness of the carbon fiber filament layer braided layer.
[0060] Specifically, the carbon fiber layer provides mechanical strength and tensile resistance. The diameter of the carbon fiber layer is 7 to 10 microns, and the weaving density is 200 to 300 grams per square meter, which can provide good flexibility while ensuring sufficient strength, so that the carbon fiber cloth layer 240 can adapt to the slight deformation of the concrete structure.
[0061] In addition, a layer of weather-resistant polyurethane coating is coated on the surface of the carbon fiber filament layer. The thickness of the coating is controlled to be 5% to 10% of the thickness of the carbon fiber filament layer braiding layer, which can provide sufficient protection without significantly increasing the overall thickness and stiffness of the carbon fiber cloth layer 240. The weather-resistant polyurethane coating can effectively block ultraviolet rays from damaging the carbon fiber filament layer and delay the aging process. At the same time, the polyurethane coating also has good wear resistance and chemical stability, and can protect the carbon fiber filament layer from environmental factors such as acid rain, salt spray, etc. By coating the weather-resistant polyurethane coating on the surface of the carbon fiber filament layer, the outdoor service life of the carbon fiber cloth layer 240 can be improved, and its long-term mechanical properties and waterproof effect can be maintained.
[0062] In an embodiment of the present invention, the chemical composition of the non-curing rubber asphalt waterproof coating layer 400 includes rubber powder, asphalt and tackifier, the ratio of rubber powder to asphalt is 1:2 to 1:3, and the added amount of tackifier is 5% to 10% of the total amount of rubber powder and asphalt.
[0063] Specifically, the rubber powder provides elasticity and flexibility to the non-curing rubber asphalt waterproof coating layer 400. When the concrete structure undergoes a slight deformation, the waterproof coating layer containing the rubber powder can adapt to the deformation, maintain its continuity and integrity, and thus maintain a good waterproof effect. The ratio of rubber powder to asphalt is controlled between 1:2 and 1:3, which can ensure that the coating layer has good waterproof performance while providing sufficient elasticity. Asphalt, as a traditional waterproof material, provides basic waterproof performance and prevents moisture from penetrating into the concrete structure. In order to further improve the adhesion of the non-curing rubber asphalt waterproof coating layer 400, the amount of tackifier added is 5% to 10% of the total amount of rubber powder and asphalt, which can improve the adhesion strength between the waterproof coating layer and the substrate, ensure that the coating layer is firmly attached to the carbon fiber cloth layer 240 and the upper return water stop 300, and form a continuous and complete waterproof barrier. At the same time, the tackifier can also improve the cohesion of the waterproof coating layer, improve its crack resistance and wear resistance.
[0064] In an embodiment of the present invention, the chemical composition of the non-curing rubber asphalt waterproof coating layer 400 further includes nano zinc oxide, and the added amount of nano zinc oxide is 0.5% to 1% of the total amount of rubber powder, asphalt and tackifier.
[0065] Specifically, when nano zinc oxide is added to non-curing rubber asphalt waterproof coating at a ratio of 0.5% to 1%, it can improve the antibacterial and anti-mildew properties of the coating layer, effectively inhibit the growth of bacteria and fungi, and prevent the coating layer from degrading due to microbial erosion.
[0066] More specifically, the nano zinc oxide particles are evenly dispersed in the non-curing rubber asphalt waterproof coating. When the coating layer is exposed to a humid environment, the nano zinc oxide particles can continuously release zinc ions, which are toxic to bacteria and fungi, inhibiting their growth and reproduction. At the same time, the nano zinc oxide particles also have photocatalytic properties and can produce active oxygen under light conditions, further enhancing its antibacterial and anti-mildew effects.
[0067] It should be noted that the optimal addition amount of nano zinc oxide is 0.5% to 1% of the total amount of rubber powder, asphalt and tackifier. It can provide sufficient antibacterial and anti-mildew effects without significantly affecting other properties of the coating layer, such as elasticity and adhesion.
[0068] Please continue reading Figure 1 and Figure 2 , and see Figure 3 The present invention also provides a method for constructing an expansion post-casting strip structure, which is used to form the expansion post-casting strip structure as described above. The method for constructing the expansion post-casting strip structure comprises:
[0069] Step S10, performing waterproof reinforcement treatment on the post-cast zone section 101 on the garage roof 100 in advance to form a post-cast zone roof;
[0070] Step S20, thickening the concrete at the top plate of the post-cast zone by 20 mm and smearing it into an inclined surface, so that the structural surface of the top plate of the post-cast zone is higher than the garage top plate 100 around the post-cast zone section 101;
[0071] Step S30, laying the post-cast strip waterproofing treatment layer 210 on the post-cast strip top plate surface in the post-cast strip section 101, evenly brushing or spraying the epoxy resin layer 220 on the post-cast strip waterproofing treatment layer 210, coating the leak-proofing layer 230 on the cured epoxy resin layer 220, and laying the carbon fiber cloth layer 240 on the leak-proofing layer 230 to form the concrete top plate 200;
[0072] Step S40, disposing one upper return water stop 300 on each side of the concrete top plate 200;
[0073] Step S50, uniformly coating the non-curing rubber asphalt waterproof coating on the outside of the carbon fiber cloth layer 240 and the upper return water stop 300 to form the non-curing rubber asphalt waterproof coating layer 400, and obtain the expanded post-casting strip structure.
[0074] Specifically, in step S10, the post-cast zone section 101 of the garage roof 100 is firstly cleaned and surface prepared in detail to ensure that there are no impurities, and then waterproof reinforcement treatment is performed. This includes applying a special waterproof coating to the post-cast zone top plate to avoid the risk of water penetration during the entire construction process, thereby reducing the possible systemic post-cast zone leakage problem in the future.
[0075] In step S20, the structural surface of the post-casting strip top plate is thickened and adjusted to ensure that water does not gather or accumulate on the structural surface, thereby preventing water from penetrating into the structure. In addition, the thickened concrete layer provides additional structural strength and enhances the overall structural stability.
[0076] In step S30, the application of the multi-layer waterproof system ensures the barrier against moisture from multiple levels, and each layer provides additional protection for the next layer. The epoxy resin layer 220 and the plugging layer 230 provide a solid waterproof barrier, while the carbon fiber cloth layer 240 increases the mechanical strength and durability of the structure.
[0077] Step S40 further enhances the waterproofing effect by installing return waterstops 300 on both sides of the concrete top plate 200. These waterstops act as physical barriers, effectively preventing water from entering the structure from the sides, thereby providing an additional layer of protection.
[0078] The non-curing rubber asphalt waterproof coating used in step S50 provides a durable waterproof layer, which material not only has excellent waterproof performance, but also has good flexibility and adaptability, and can cover and protect the entire structure and prevent moisture from entering through any cracks or joints.
[0079] It should be understood that the specific structure of the expansion post-cast strip structure refers to the above-mentioned embodiments. Since the construction method of the expansion post-cast strip structure adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.
[0080] Please continue reading Figures 1 to 3 , and see Figure 4 In an embodiment of the present invention, before the step of providing one upper return water stop 300 on each side of the concrete top plate 200, the expansion post-casting strip structure construction method further includes:
[0081] Step A10: chiseling a groove at the junction of the concrete top plate 200 and the top plate of the post-cast strip to form a transition groove; the transition groove has a V-shaped structure.
[0082] Specifically, the maximum width of the transition groove is 60mm and the depth is 40mm. After the chiseling is formed, the leak-proof layer 230 needs to be used to seal and smooth the groove. After the leak-proof layer 230 is leveled and dried, start to apply the first coat of epoxy resin. The width of the coating is 250mm on each side of the chiseling center line to ensure that the epoxy resin can fully penetrate and tightly bond with the concrete structure. Then, lay the first coat of carbon fiber cloth on the first coat of epoxy resin. After the carbon fiber cloth is laid, apply the second coat of epoxy resin to ensure sufficient bonding between the carbon fiber cloth and the epoxy resin. After the second coat of epoxy resin is applied, lay the second coat of carbon fiber cloth, and finally apply another coat of epoxy resin to complete the "three oils and two cloths" construction process. When applying each coat of epoxy resin, the continuity of the construction must be ensured, and no bottom exposure or missed brushing should occur to ensure the integrity and effectiveness of the waterproof layer.
[0083] This embodiment can improve the waterproof performance of the joint by setting a V-shaped transition groove at the junction of the concrete top plate 200 and the top plate of the post-cast strip, and adopting the "three oils and two cloths" construction process. First, the setting of the V-shaped groove increases the contact area of the joint, allowing the waterproof material to penetrate more fully and combine with the concrete structure to form a more solid waterproof barrier. Secondly, the application of the plugging layer 230 can effectively fill the tiny cracks and pores in the concrete structure to prevent moisture from penetrating into the structure through these defects. Furthermore, the epoxy resin and carbon fiber cloth used alternately in the "three oils and two cloths" process can form a high-strength, high-toughness composite waterproof layer, which effectively blocks the penetration of moisture, and also improves the structural strength and stability of the joint.
[0084] It should be noted that step A10 combined with the waterproof measures in the previous steps can form a comprehensive and three-dimensional waterproof system. For example, in step S30, the laying of the post-casting strip waterproof treatment layer 210, epoxy resin layer 220, plugging layer 230 and carbon fiber cloth layer 240 has formed a solid waterproof barrier on the concrete top plate 200. The transition groove treatment in step A10 further strengthens the waterproof performance of the connection between the concrete top plate 200 and the post-casting strip top plate, effectively eliminates the waterproof weak points, and ensures the waterproof integrity of the entire expanded post-casting strip structure.
[0085] Please continue reading Figures 1 to 3 , and see Figure 5 In an embodiment of the present invention, before the step of providing one upper return water stop 300 on each side of the concrete top plate 200, the expansion post-casting strip structure construction method further includes:
[0086] Step B10: Apply a base treatment agent to the construction joints of the concrete top plate 200 to perform waterproof reinforcement treatment.
[0087] Specifically, an additional waterproof layer is added at the construction joint. The additional layer consists of a 2.0 mm thick non-curing rubber asphalt waterproof coating and a 4 mm thick SBS root-penetration-resistant modified asphalt waterproof membrane. The construction width is 250 mm on each side of the construction joint. The non-curing rubber asphalt waterproof coating has flexibility and adhesion, and can effectively fill the tiny cracks and unevenness at the construction joint to form a continuous and dense waterproof membrane. At the same time, the non-curing coating also has good self-healing ability. Even when the concrete structure is slightly deformed, it can maintain the integrity of the waterproof membrane and effectively prevent crack expansion and water penetration.
[0088] SBS root puncture resistant modified asphalt waterproofing membrane provides a more solid waterproof barrier. It has puncture resistance and can effectively resist the stress caused by external loads and temperature changes to prevent the waterproof layer from being damaged. At the same time, SBS modified asphalt membrane also has good aging resistance and weather resistance, and can maintain stable waterproof performance for a long time, ensuring long-term protection of the 200 construction joints of the concrete top plate.
[0089] In the actual construction process, the construction joints need to be treated at the base layer first, including cleaning, drying and grinding, to ensure the flatness and cleanliness of the base layer, and provide a good foundation for the subsequent laying of the waterproof layer. Then, non-curing rubber asphalt waterproof coating is applied to the construction joints, and the coating thickness is controlled at about 2.0mm to ensure the uniformity and continuity of the coating. After the non-curing coating is initially cured, 4mm thick SBS root puncture-resistant modified asphalt waterproof membrane is laid. The overlap width of the membrane is not less than 100mm. The overlap needs to be hot-melt bonded or coated with a special adhesive to ensure the tight connection and waterproof performance between the membranes.
[0090] It should be noted that step B10 combined with the waterproof measures in the previous steps can form a more comprehensive and reliable waterproof system. For example, in step A10, by setting a V-shaped transition groove at the junction of the concrete top plate 200 and the post-cast strip top plate and adopting the "three oils and two cloths" construction process, the waterproof performance of the connection has been significantly improved. The waterproof reinforcement measures at the construction joints in step B10 further strengthen the waterproof performance of the concrete top plate 200 itself, eliminate another potential leakage point, and ensure the waterproof integrity and reliability of the entire expanded post-cast strip structure.
[0091] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. An expansion post-casting strip structure, characterized in that: include: A garage roof, wherein the garage roof is provided with a post-cast zone; A concrete top plate, the concrete top plate is arranged on the garage top plate; the concrete top plate comprises a post-cast strip waterproofing layer, an epoxy resin layer, a leak-proofing layer and a carbon fiber cloth layer, the post-cast strip waterproofing layer is attached to the post-cast strip interval, the epoxy resin layer covers the surface of the post-cast strip waterproofing layer, the leak-proofing layer is coated on the epoxy resin layer, and the carbon fiber cloth layer covers the leak-proofing layer; Two upper return water stop sills, two upper return water stop sills are respectively arranged on both sides of the concrete top plate; A non-curing rubber asphalt waterproof coating layer, wherein the non-curing rubber asphalt waterproof coating layer covers the outside of the concrete top plate and the upper return water stop sill.
2. The expansion post-casting strip structure according to claim 1, characterized in that: The chemical composition of the epoxy resin layer includes epoxy groups and a hardener, and the ratio of the epoxy groups to the hardener is 2:1 to 4:
1.
3. The expansion post-casting strip structure according to claim 2, characterized in that: The chemical composition of the epoxy resin layer also includes nano silicon dioxide particles, and the added amount of the nano silicon dioxide is 1% to 3% of the total amount of the epoxy group and the hardener.
4. The expansion post-casting strip structure according to claim 3, characterized in that: The chemical composition of the plugging layer includes silicate cement, micro-expansion agent and plasticizer. The addition amount of the plasticizer is 2% to 5% of the total amount of the silicate cement, and the addition amount of the micro-expansion agent is 0.5% to 1% of the total amount of the silicate cement.
5. The expansion post-casting strip structure according to claim 4, characterized in that: The carbon fiber cloth layer comprises a weather-resistant polyurethane coating and a carbon fiber filament layer. The weather-resistant polyurethane coating is coated on the surface of the carbon fiber filament layer. The thickness of the weather-resistant polyurethane coating is 5% to 10% of the thickness of the carbon fiber filament layer braided layer.
6. The expansion post-casting strip structure according to any one of claims 1 to 5, characterized in that: The chemical composition of the non-curing rubber asphalt waterproof coating layer includes rubber powder, asphalt and tackifier. The ratio of the rubber powder to the asphalt is 1:2 to 1:3, and the added amount of the tackifier is 5% to 10% of the total amount of the rubber powder and the asphalt.
7. The expansion post-casting strip structure according to claim 6, characterized in that: The chemical composition of the non-curing rubber asphalt waterproof coating layer also includes nano zinc oxide, and the added amount of the nano zinc oxide is 0.5% to 1% of the total amount of the rubber powder, the asphalt and the tackifier.
8. A method for constructing an expansion post-casting strip structure, characterized in that: Used to form an expansion post-cast strip structure as claimed in any one of claims 1 to 7, the expansion post-cast strip structure construction method comprising: Performing waterproof reinforcement treatment on the post-cast zone section on the garage roof in advance to form a post-cast zone roof; Thicken the concrete at the top plate of the post-cast zone by 20 mm and make it into an inclined surface so that the structural surface of the top plate of the post-cast zone is higher than the roof plate of the garage around the post-cast zone; The post-cast strip waterproofing treatment layer is laid on the surface of the post-cast strip top plate in the post-cast strip interval, an epoxy resin layer is evenly brushed or sprayed on the post-cast strip waterproofing treatment layer, a plugging layer is coated on the cured epoxy resin layer, and the carbon fiber cloth layer is laid on the plugging layer to form the concrete top plate; An upper return water stop is provided on each side of the concrete top plate; The non-curing rubber asphalt waterproof coating is uniformly coated on the outside of the carbon fiber cloth layer and the upper return water stop to form the non-curing rubber asphalt waterproof coating layer to obtain the expansion post-casting strip structure.
9. The expansion post-casting strip structure construction method according to claim 8, characterized in that: Before the step of providing one upper return water stop on each side of the concrete top plate, the expansion post-casting strip structure construction method further includes: A groove is chiseled at the junction of the concrete top plate and the post-cast strip top plate to form a transition groove; the transition groove is a V-shaped structure.
10. The expansion post-casting strip structure construction method according to claim 8, characterized in that: Before the step of providing one upper return water stop on each side of the concrete top plate, the expansion post-casting strip structure construction method further includes: A base treatment agent is applied to the construction joints of the concrete top plate to perform waterproof reinforcement treatment.