Impermeable durable prefabricated assembly type concrete reverse ridge and processing technology thereof

Abstract

The invention relates to the technical field of constructional engineering, in particular to an anti-seepage durable prefabricated assembly type concrete reverse ridge and a machining process thereof. By producing the prefabricated reverse ridge, the problems that on-site formwork erecting is difficult, and a mold is prone to deviation are solved, and meanwhile the size accuracy of the reverse ridge and the surface forming quality are improved; high-quality reverse ridge products are directly conveyed to the site to be installed, the problem that cast-in-place reverse ridge finished products are long in protection time is solved, later repair work is reduced, the fabricated reverse ridge can be flexibly adjusted and assembled in application scenes such as city updating, building function transformation, space variable transformation and flat and plague combined transformation, and the construction efficiency is improved. The disassembled assembly type reverse ridge can be recycled; the fabricated partition wall has good compatibility with fabricated partition walls of different thicknesses, the industrialization and fabricated construction level is improved, the construction speed is increased, and excellent environment friendliness is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building engineering, in particular to a kind of anti-permeability durable prefabricated assembly type concrete reverse ridge and its processing technology. BACKGROUND

[0002] The concrete reverse ridge is usually arranged at the root of the wall of the room involved in water, and is integrally poured with the floor slab, and the main purpose is to block the water penetration path and prevent water from penetrating to the upper part of the wall and the adjacent room. In the traditional method, since the reverse ridge formwork needs to be suspended, there are difficulties in fixing, and the stress is easy to deviate, etc. Secondly, the upper turning concrete has problems such as poor pouring quality and surface forming quality, and in addition, the finished product protection time is relatively long, which leads to a large amount of repair and rework in the later period, which not only increases the construction cost, but also increases the construction period, which has always been a difficult problem in the construction process of the building industry. In actual application scenarios, such as urban renewal, building function reconstruction, space variable reconstruction, and combination of epidemic prevention and reconstruction, the traditional method lacks flexibility and construction convenience, and a large amount of wet work is criticized in the construction process of the building industry.

[0003] Therefore, we propose a kind of anti-permeability durable prefabricated assembly type concrete reverse ridge and its processing technology. SUMMARY

[0004] The present application aims to provide an anti-permeability durable prefabricated assembly type concrete reverse ridge and its processing technology to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose of the application, the present application provides the following technical scheme: A processing technology for an anti-permeability durable prefabricated assembly type concrete reverse ridge, comprising the following steps: Step a: production of prefabricated reverse ridge: the factory designs a mold according to the reverse ridge deepening drawing, and produces the reverse ridge in batches according to the drawing, and transports it to the construction site; Step b: reverse ridge installation: chisel the floor slab surface where the reverse ridge is to be installed, clean the surface dust and wet it, then lay waterproof mortar, pour the reverse ridge and the concrete floor slab to form an integral structure, form an L-shaped structure layer, and use a rubber hammer to knock the top surface of the reverse ridge to compact the mortar, and pour waterproof mortar into the joint at both ends of the reverse ridge and compact it; Step c: anti-cracking reinforcement layer making: the inside corner between the concrete floor slab and the reverse ridge is poured into a round corner, and the prefabricated assembly type reverse ridge is additionally provided with an anti-cracking reinforcement layer at the joint vertical seam and the horizontal seam with the floor slab, and the preparation steps of the anti-cracking reinforcement layer are: cement mortar leveling layer, first waterproof layer, intermediate polyester cloth, second waterproof layer and finishing layer are laid in sequence; cement mortar leveling layer, first waterproof layer, intermediate alkali-resistant glass fiber mesh cloth, second waterproof layer and finishing layer are laid in sequence.

[0006] Further, the prefabricated reverse dam is formed into a rectangular steel reinforcement framework by binding 4 longitudinal through steel bars with a diameter of 10 mm and stirrups with a diameter of 6 mm and a spacing of 200 mm, and the concrete dam body is formed by pouring concrete outside the steel reinforcement framework; a round head lifting peg is arranged at a distance of 1 / 5 to 1 / 4 of the length of the dam end; a PVC pipe with a diameter of 100 mm is arranged along the length direction in the middle of the dam body, the pipe is cut off at the lifting peg and the two ends are sealed, and a closed cavity is formed in the interior of the dam body.

[0007] Further, the waterproof layer comprises the following components by weight: polyurethane emulsion 45-95 parts, film forming aid 3-5 parts, defoaming agent 0.3-0.5 parts, leveling agent 0.1-0.3 parts, titanium white 5-15 parts, modified calcium carbonate 10-30 parts, and quartz sand 20-40 parts.

[0008] Further, the preparation method of the polyurethane emulsion is as follows: The modified polyester, sulfonate grafted polyester diol, polyether polyol and antioxidant are mixed uniformly, vacuum dewatering is performed at 110-120℃ for 2-3h, the temperature is lowered to 80-90℃, isophorone diisocyanate and dibutyltin dilaurate are added under nitrogen protection, mixed uniformly, and reacted for 3-5h, 2,2-dimethylol butyric acid and acetone are added, and reacted for 3-5h; the temperature is lowered to 30-40℃, triethylamine is added for neutralization, deionized water is added for emulsification, and the solvent acetone is removed by vacuum extraction to obtain the polyurethane emulsion.

[0009] Further, the polyurethane emulsion comprises the following components by weight: modified polyester 30-40 parts, sulfonate grafted polyester diol 5-15 parts, polyether polyol 10-20 parts, isophorone diisocyanate 70-80 parts, dibutyltin dilaurate 1-3 parts, 2,2-dimethylol butyric acid 2-4 parts, triethylamine 0.2-0.5 parts, antioxidant 0.1-0.4 parts, and deionized water 80-100 parts.

[0010] Further, the preparation method of the modified polyester is as follows: Step 1: under nitrogen protection, itaconic acid, succinic acid, ethylene glycol, isosorbide, hydroquinone and tetrabutyl titanate are mixed uniformly, and reacted at 160-170℃ for 2-3h, the vacuum degree of the system is controlled to be 0.09MPa, and reacted at 160-170℃ for 5-7h, and then cooled to room temperature, and after purification and drying, a polyester containing double bonds is obtained; Step 2: under nitrogen protection, castor oil and 3-mercaptopropionic acid are mixed uniformly, p-toluenesulfonic acid and p-hydroxyanisole are added, and reacted at 80-90℃ for 20-24h, and then washed and dried to obtain a castor oil-based mercaptan monomer; Step 3: Under the protection of nitrogen, octamethylcyclotetrasiloxane, pentamethylpentavinylcyclopentasiloxane and trifluoropropyltrimethylcyclotrisiloxane were mixed uniformly, heated to 100-110℃, and then tetramethylammonium hydroxide and deionized water were added and mixed uniformly, reacted for 3-5h, and then continuously heated to 145-150℃, kept for 2-3h, and then obtained after distillation under reduced pressure, end-hydroxyl fluorine-containing vinyl polysiloxane; Step 4: The double-bond-containing polyester, the end-hydroxyl fluorine-containing vinyl polysiloxane and the castor oil thiol monomer were mixed uniformly, and a photoinitiator was added, and then ultraviolet light was irradiated for 30-60min to obtain a modified polyester.

[0011] In the above technical solution, in step 1, bio-based monomers itaconic acid, succinic acid, ethylene glycol and isosorbide are used as raw materials to prepare a double-bond-containing polyester by melt polycondensation; in step 2, castor oil and 3-mercaptopropionic acid are used as raw materials to prepare a UV-curable bio-based monomer, i.e. a castor oil thiol monomer, by a simple and green process, which has hydrophobic properties; in step 3, deionized water is used as an end-capping agent, and tetramethylammonium hydroxide is used as a catalyst, and then octamethylcyclotetrasiloxane, trifluoropropyltrimethylcyclotrisiloxane and pentamethylpentavinylcyclopentasiloxane are reacted to introduce double bonds to obtain an end-hydroxyl fluorine-containing vinyl polysiloxane, which has high viscosity and good hydrophobic properties; in step 4, the double-bond-containing polyester, the end-hydroxyl fluorine-containing vinyl polysiloxane and the castor oil thiol monomer are used as raw materials to prepare a modified polyester by a thiol-ene click reaction, which contains a large number of hydroxyl groups and can participate in the synthesis of polyurethane to form a strong chemical cross-linking structure, thereby endowing the polyurethane with excellent waterproof performance and mechanical properties.

[0012] Further, in step 1, the double-bond-containing polyester comprises the following components by weight: itaconic acid 15-18 parts, succinic acid 6-8 parts, ethylene glycol 15-20 parts, isosorbide 5-8 parts, hydroquinone 0.01-0.03 parts, and tetrabutyl titanate 0.01-0.03 parts.

[0013] Further, the mass ratio of octamethylcyclotetrasiloxane, pentamethylpentavinylcyclopentasiloxane and trifluoropropyltrimethylcyclotrisiloxane is 1:(1.0-1.2):(2.0-2.2), the mass of tetramethylammonium hydroxide is 0.03-0.05% of the mass of trifluoropropyltrimethylcyclotrisiloxane, and the mass of deionized water is 0.1-0.3% of the mass of trifluoropropyltrimethylcyclotrisiloxane.

[0014] Further, the mass ratio of castor oil, 3-mercaptopropionic acid, p-toluenesulfonic acid and p-hydroxyanisole is 1:(0.35-0.40):(0.1-0.3):(0.01-0.03).

[0015] Further, the mass ratio of the double bond-containing polyester, the hydroxyl-terminated fluorine-containing vinyl polysiloxane and the castor oil-based mercaptan monomer is 1: (0.3-0.5): (1-2): (0.1-0.3).

[0016] Further, the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone.

[0017] Further, the process conditions of the ultraviolet light irradiation are as follows: irradiation wavelength 360-400 nm, irradiation intensity 20-25 mW / cm 2 .

[0018] Further, the preparation method of the modified calcium carbonate is as follows: The calcium carbonate is mixed with maleic anhydride, stirred at 90-120 DEG C for 0.5-1 h to obtain calcium carbonate-maleic anhydride; the calcium carbonate-maleic anhydride is mixed with modified polyester at 20-25 DEG C, and tetrabutyl titanate is added, and the temperature is raised to 150-170 DEG C and stirred for 0.5-1 h to obtain modified calcium carbonate.

[0019] Further, the mass ratio of the calcium carbonate and maleic anhydride is 1: (0.3-0.5).

[0020] Further, the mass ratio of the calcium carbonate-maleic anhydride, the modified polyester and the tetrabutyl titanate is 1: (0.2-0.8): (0.03-0.05).

[0021] Further, the thickness of the waterproof layer is 1.5 mm.

[0022] Further, the facing layer adopts 10 mm thick anti-slip floor tiles.

[0023] Compared with the prior art, the present application has the following beneficial effects: 1、The anti-permeation durable prefabricated assembly type concrete reverse ridge and the processing technology thereof solve the problems of difficult site formwork and easy formwork deviation, improve the precision of the size of the reverse ridge and the surface forming quality, directly transport the high-quality reverse ridge products to the site for installation, solve the problem of long protection time of the cast-in-place reverse ridge product, reduce the later repair work, and can flexibly adjust and assemble the prefabricated reverse ridge in application scenarios such as city renewal, building function reconstruction, space variable reconstruction, and combination of epidemic prevention and reconstruction, the disassembled prefabricated reverse ridge can be recycled and reused, has good compatibility with prefabricated partition walls (such as ALC and light steel keel partition walls) of different thicknesses, improves the industrialization and prefabricated construction level, improves the construction speed, and has excellent environmental protection.

[0024] 2, The anti-permeation durable prefabricated concrete reverse ridge and its processing technology, by introducing modified polyester and sulfonate grafted polyester diol into the polyurethane emulsion, not only improves the hydrolysis resistance, strength and wear resistance after film formation, so that the waterproof coating can maintain integrity and functionality in long-term use, and at the same time, excellent mechanical stability and compatibility with cement-based materials are endowed to the emulsion; modified calcium carbonate is used as a functional filler in the polyurethane waterproof layer, the organic long chain (polyester grafting) on the surface of the modified calcium carbonate is entangled or covalently combined with the polyurethane molecular chain, which significantly enhances the interfacial adhesion between the filler and the matrix, and further improves the mechanical strength, crack resistance and durability of the waterproof coating. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings are included to provide a further understanding of the application, and constitute a part of the specification, illustrate the application together with the embodiments thereof, and explain the application without limiting the application. In the drawings: Figure 1 is a structural schematic diagram of the prefabricated reverse ridge in the application. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0027] The following parts are mass parts unless otherwise specified; it should be noted that there is no special restriction on the purchase manufacturers of all raw materials involved in the application, which exemplarily includes: waterproof mortar: M7.5; sulfonate grafted polyester diol: model BY-3306 (Mn=500), purchased from Beijing Baiyuan Chemical Co., Ltd.; polyether polyol: CP450, from Dow Chemical; film forming aid: 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate; quartz sand: purchased from Henan Minghai Environmental Protection Technology Co., Ltd.; calcium carbonate: purchased from Lingshou Dehang Mineral Products Co., Ltd.; titanium white: Ti-PureTM R-902+; leveling agent: model is Keyin KYC-615; defoaming agent: model is BYK-028; antioxidant: antioxidant 1010; polyester cloth: 200g / m 2 ; alkali-resistant glass fiber mesh cloth: 180g / m 2 .

[0028] Embodiment 1: an anti-permeation durable prefabricated concrete reverse ridge and its processing technology, comprising the following steps: Step a: produce prefabricated reverse ridge: the factory designs a mold according to the reverse ridge deepening drawing, mass-produces the reverse ridge according to the drawing, and transports it to the construction site; Step b: reverse ridge installation: the floor surface to be installed with the reverse ridge is chiseled, the surface dust is cleaned, and then it is wetted, waterproof mortar is laid, the reverse ridge and the concrete floor are integrated, an L-shaped structure layer is formed, the top surface of the reverse ridge is knocked with a rubber hammer to compact the mortar, the mortar squeezed out from both sides of the ridge bottom is 10 mm, and no more mortar is squeezed out, the waterproof mortar is poured and compacted at the joint of the two ends of the reverse ridge; Step c: anti-cracking reinforcement layer production: the inside corner between the concrete floor and the reverse ridge is poured into a round corner, the prefabricated reverse ridge is additionally provided with an anti-cracking reinforcement layer at the joint vertical seam and the horizontal seam with the floor; the preparation steps of the anti-cracking reinforcement layer are as follows: the cement mortar leveling layer is sequentially provided with a first waterproof layer, an intermediate polyester cloth, a second waterproof layer and a finishing layer; the cement mortar leveling layer is sequentially provided with a first waterproof layer, an intermediate alkali-resistant glass fiber mesh cloth, a second waterproof layer and a finishing layer; The waterproof layer comprises the following components by weight: 45 parts of polyurethane emulsion, 3 parts of film-forming aid, 0.3 parts of defoaming agent, 0.1 part of leveling agent, 5 parts of titanium white, 10 parts of modified calcium carbonate and 20 parts of quartz sand; The preparation method of the polyurethane emulsion is as follows: 30 parts of modified polyester, 5 parts of sulfonate grafted polyester diol, 10 parts of polyether polyol and 0.1 part of antioxidant are uniformly mixed, vacuum dehydration is carried out at 110°C for 2h, the temperature is lowered to 80°C, 70 parts of isophorone diisocyanate and 1 part of dibutyltin dilaurate are uniformly mixed under nitrogen protection, reaction is carried out for 3h, 2 parts of 2,2-dimethylol butyric acid and 40 parts of acetone are added, reaction is carried out for 3h, the temperature is lowered to 30°C, 0.2 parts of triethylamine is added for neutralization, and then 100 parts of deionized water is added for emulsification, the solvent acetone is removed by vacuum extraction, and a polyurethane emulsion is obtained; The preparation method of the modified polyester is as follows: Step 1: under nitrogen protection, 15 parts of itaconic acid, 6 parts of succinic acid, 15 parts of ethylene glycol, 5 parts of isosorbide, 0.01 parts of hydroquinone and 0.01 parts of tetrabutyl titanate are uniformly mixed, the vacuum degree of the system is controlled to be 0.09 MPa, reaction is carried out at 160°C for 5h, and after cooling to room temperature, purification and drying are carried out to obtain a polyester containing double bonds; Step 2: under nitrogen protection, 30 parts of castor oil and 10.5 parts of 3-mercaptopropionic acid are uniformly mixed, 3 parts of p-toluenesulfonic acid and 0.03 parts of p-hydroxyanisole are added, reaction is carried out at 80°C for 20h, and after washing and drying, a castor oil-based mercaptan monomer is obtained; Step 3: Under the protection of nitrogen, 10 parts of octamethylcyclotetrasiloxane, 10 parts of pentamethylpentavinylcyclopentasiloxane and 20 parts of trifluoropropyltrimethylcyclotrisiloxane are uniformly mixed, heated to 100℃, 0.006 parts of tetramethylammonium hydroxide and 0.02 parts of deionized water are uniformly mixed, reacted for 3h, continuously heated to 145℃, and kept for 2h, then distilled under reduced pressure to obtain a hydroxyl-terminated fluorine-containing vinyl polysiloxane; Step 4: 30 parts of a double bond-containing polyester, 9 parts of a hydroxyl-terminated fluorine-containing vinyl polysiloxane and 30 parts of a castor oil base mercaptan monomer are uniformly mixed, 3 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone is added, and ultraviolet light is irradiated for 30min, the irradiation wavelength is 360nm, and the irradiation intensity is 20mW / cm 2 to obtain a modified polyester; The preparation method of the modified calcium carbonate is as follows: 10 parts of calcium carbonate and 3 parts of maleic anhydride are mixed and stirred at 90℃ for 0.5h to obtain calcium carbonate-maleic anhydride; 10 parts of calcium carbonate-maleic anhydride is uniformly mixed with 2 parts of modified polyester at 20℃, 0.3 parts of tetrabutyl titanate is added, and stirring is carried out at 150℃ for 0.5h to obtain modified calcium carbonate.

[0029] Example 2: A kind of anti-permeability durable prefabricated assembly type concrete reverse ridge and its processing technology, comprising the following steps: Step a: production of prefabricated reverse ridge: the factory designs the mold according to the reverse ridge deepening drawing, produces the reverse ridge in batches according to the drawing, and transports it to the construction site; Step b: reverse ridge installation: the floor surface to be installed with the reverse ridge is chiseled, the surface dust is cleaned and moistened, waterproof mortar is laid, the reverse ridge and the concrete floor are integrated to form an L-shaped structure layer, and the top surface of the reverse ridge is knocked with a rubber hammer to compact the mortar, so that the mortar is squeezed out 11mm on both sides of the ridge bottom, and no more mortar is squeezed out; Step c: preparation of anti-cracking reinforcement layer: the inside corner between the concrete floor and the reverse ridge is poured into a round corner, and the prefabricated assembly type reverse ridge is additionally provided with an anti-cracking reinforcement layer at the spliced vertical joint and the horizontal joint with the floor; the preparation steps of the anti-cracking reinforcement layer are as follows: the cement mortar leveling layer is sequentially provided with a first waterproof layer, an intermediate polyester cloth, a second waterproof layer and a finishing layer; the cement mortar leveling layer is sequentially provided with a first waterproof layer, an intermediate alkali-resistant glass fiber mesh cloth, a second waterproof layer and a finishing layer; The waterproof layer comprises the following components by weight: polyurethane emulsion 75 parts, film forming aid 4 parts, defoaming agent 0.4 parts, leveling agent 0.2 parts, titanium white 10 parts, modified calcium carbonate 20 parts, and quartz sand 30 parts; The preparation method of the polyurethane emulsion is as follows: Mixing 35 parts of modified polyester, 10 parts of sulfonate grafted polyester diol, 15 parts of polyether polyol and 0.3 parts of antioxidant uniformly, vacuum dehydration at 115℃ for 2.5h, cooling to 85℃, adding 80 parts of isophorone diisocyanate and 2 parts of dibutyltin dilaurate under nitrogen protection, mixing uniformly, reacting for 4h, adding 3 parts of 2,2-dimethylol butyric acid and 40 parts of acetone, reacting for 4h; cooling to 35℃, adding 0.3 parts of triethylamine for neutralization, then adding 90 parts of deionized water for emulsification, vacuumizing to remove the solvent acetone, to obtain a polyurethane emulsion; The preparation method of the modified polyester is as follows: Step 1: under nitrogen protection, mixing 16 parts of itaconic acid, 7 parts of succinic acid, 18 parts of ethylene glycol, 7 parts of isosorbide, 0.02 parts of hydroquinone and 0.02 parts of tetrabutyl titanate uniformly, reacting at 165℃ for 2.5h, controlling the vacuum degree of the system to be 0.09MPa, reacting at 165℃ for 6h, cooling to room temperature, after purification and drying, a double bond containing polyester is obtained; Step 2: under nitrogen protection, mixing 50 parts of castor oil and 20 parts of 3-mercaptopropionic acid uniformly, adding 5 parts of p-toluenesulfonic acid and 0.5 parts of p-hydroxyanisole, reacting at 85℃ for 22h, after washing and drying, a castor oil based mercaptan monomer is obtained; Step 3: under nitrogen protection, mixing 14 parts of octamethylcyclotetrasiloxane, 15.4 parts of pentamethylpentavinylcyclopentasiloxane and 29 parts of trifluoropropyltrimethylcyclotrisiloxane uniformly, heating to 105℃, adding 0.01 parts of tetramethylammonium hydroxide and 0.087 parts of deionized water, mixing uniformly, reacting for 4h, continuing to heat to 148℃, keeping for 2.5h, after vacuum distillation, a hydroxyl-terminated fluorine-containing vinyl polysiloxane is obtained; Step 4: mixing 35 parts of double bond containing polyester, 14 parts of hydroxyl-terminated fluorine-containing vinyl polysiloxane and 50 parts of castor oil based mercaptan monomer uniformly, adding 7 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone, irradiating under ultraviolet light for 50min, the irradiation wavelength is 380nm, the irradiation intensity is 24mW / cm 2 , to obtain a modified polyester; The preparation method of the modified calcium carbonate is as follows: Mixing 20 parts of calcium carbonate with 8 parts of maleic anhydride at 100℃ for 0.8h to obtain calcium carbonate-maleic anhydride; mixing 20 parts of calcium carbonate-maleic anhydride with 10 parts of modified polyester uniformly at 22℃, adding 0.8 parts of tetrabutyl titanate, heating to 160℃ and stirring for 0.8h to obtain modified calcium carbonate.

[0030] Example 3: an anti-permeation durable prefabricated assembly type concrete reverse ridge and its processing technology, comprising the following steps: Step a: produce prefabricated reverse ridge: the factory designs a mold according to the reverse ridge deepening drawing, mass-produces the reverse ridge according to the drawing, and delivers it to the construction site; Step b: reverse ridge installation: the floor surface to be installed with the reverse ridge is chiseled, the surface dust is cleaned, and then it is wetted, waterproof mortar is laid, the reverse ridge and the concrete floor are integrated, an L-shaped structure layer is formed, the top surface of the reverse ridge is knocked with a rubber hammer to compact the mortar, the mortar is squeezed out 12mm from both sides of the ridge bottom, and no more mortar is squeezed out, the waterproof mortar is poured into the joint at both ends of the reverse ridge and is compacted; Step c: anti-cracking reinforcement layer production: the inside corner between the concrete floor and the reverse ridge is poured into a round corner, the prefabricated reverse ridge is additionally provided with an anti-cracking reinforcement layer at the spliced vertical joint and the horizontal joint with the floor, and the preparation steps of the anti-cracking reinforcement layer are as follows: the cement mortar leveling layer is sequentially provided with a first waterproof layer, an intermediate polyester cloth, a second waterproof layer, and a finishing layer; the cement mortar leveling layer is sequentially provided with a first waterproof layer, an intermediate alkali-resistant glass fiber mesh cloth, a second waterproof layer, and a finishing layer; The waterproof layer comprises the following components by weight: 95 parts of polyurethane emulsion, 5 parts of film-forming aid, 0.5 part of defoaming agent, 0.3 part of leveling agent, 15 parts of titanium white, 30 parts of modified calcium carbonate, and 40 parts of quartz sand; The preparation method of the polyurethane emulsion is as follows: 40 parts of modified polyester, 15 parts of sulfonate grafted polyester diol, 20 parts of polyether polyol, and 0.4 parts of antioxidant are uniformly mixed, vacuum dehydration is performed at 120°C for 3h, the temperature is lowered to 90°C, 90 parts of isophorone diisocyanate and 3 parts of dibutyltin dilaurate are uniformly mixed under nitrogen protection, reaction is performed for 5h, 4 parts of 2,2-dimethylol butyric acid and 40 parts of acetone are added, reaction is performed for 5h, the temperature is lowered to 40°C, 0.5 parts of triethylamine is added for neutralization, and then 100 parts of deionized water is added for emulsification, the solvent acetone is removed by vacuum extraction, and a polyurethane emulsion is obtained; The preparation method of the modified polyester is as follows: Step 1: under nitrogen protection, 18 parts of itaconic acid, 8 parts of succinic acid, 20 parts of ethylene glycol, 8 parts of isosorbide, 0.03 parts of hydroquinone, and 0.03 parts of tetrabutyl titanate are uniformly mixed, reaction is performed at 170°C for 3h, the vacuum degree of the system is controlled to be 0.09MPa, reaction is performed at 170°C for 7h, the temperature is cooled to room temperature, and after purification and drying, a double-bond-containing polyester is obtained; Step 2: under nitrogen protection, 80 parts of castor oil and 32 parts of 3-mercaptopropionic acid are uniformly mixed, 24 parts of p-toluenesulfonic acid and 2.4 parts of p-hydroxyanisole are added, reaction is performed at 90°C for 24h, and after washing and drying, a castor oil-based mercaptan monomer is obtained; Step 3: Under nitrogen protection, 20 parts of octamethylcyclotetrasiloxane, 24 parts of pentamethylpentavinylcyclopentasiloxane and 44 parts of trifluoropropyltrimethylcyclotrisiloxane were uniformly mixed, and the temperature was raised to 110°C. 0.022 parts of tetramethylammonium hydroxide and 0.13 parts of deionized water were uniformly mixed, and the reaction was carried out for 5h. The temperature was continuously raised to 150°C, and the temperature was kept for 3h. After vacuum distillation, a hydroxyl-terminated fluorine-containing vinyl polysiloxane was obtained; Step 4: 40 parts of a double-bond-containing polyester, 20 parts of a hydroxyl-terminated fluorine-containing vinyl polysiloxane and 80 parts of a ricin oil thiol monomer were uniformly mixed, 12 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone was added, and the mixture was irradiated with ultraviolet light for 60min. The wavelength of the irradiation was 400nm, and the irradiation intensity was 25mW / cm 2 , to obtain a modified polyester; The preparation method of the modified calcium carbonate is as follows: 30 parts of calcium carbonate was mixed with 15 parts of maleic anhydride at 120°C for 1h to obtain calcium carbonate-maleic anhydride. 30 parts of calcium carbonate-maleic anhydride was uniformly mixed with 24 parts of modified polyester at 25°C, and tetrabutyl titanate was added. The temperature was raised to 170°C and stirred for 1h to obtain modified calcium carbonate.

[0031] Comparative Example 1: Compared with Example 2, Comparative Example 1 uses a commercially available polyurethane emulsion (model F12-0301, purchased from Shenzhen Jitian Chemical Co., Ltd.) as the waterproof layer, and the other steps are the same as Example 2.

[0032] Comparative Example 2: Compared with Example 2, in Comparative Example 2, the modified polyester is replaced by the same mass of double-bond-containing polyester, and the other steps are the same as Example 2.

[0033] Comparative Example 3: Compared with Example 2, in Comparative Example 3, the modified calcium carbonate is replaced by the same mass of calcium carbonate, and the other steps are the same as Example 2.

[0034] Experiment: The waterproof layers obtained in Examples 1-3 and Comparative Examples 1-3 were taken to detect their properties and record the detection results: The water contact angle was measured by JC2000DM contact angle measuring instrument, and the volume of deionized water was 2μL. The tensile strength was tested according to Chapter 9 of GB / T16777-2008, and the tensile speed was 500mm / min. The adhesion strength was tested according to Method A in 7.1 of GB / T16777-2008, and the test results are shown in Table 1.

[0035] Table 1

[0036] According to the data in the above table, the following conclusions can be clearly obtained: compared with Comparative Examples 1-3, the waterproof layer prepared in Inventive Examples 1-3 has excellent hydrophobicity and mechanical properties, thereby prolonging the service life of the material.

[0037] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0038] It will be apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than the foregoing description, and it is intended that all changes that come within the meaning and range of equivalency of the claims are embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims.

Claims

1. A processing technology for a seepage-resistant and durable precast assembled concrete inverted curb, characterized in that: Includes the following steps: Step a: Production of precast curbs: The factory designs molds based on the detailed curb drawings, mass-produces the curbs according to the drawings, and transports them to the construction site; Step b: Installation of the inverted curb: Roughen the floor slab surface to be installed with the inverted curb, clean the surface dust and wet it, then lay waterproof mortar, pour the inverted curb and concrete floor slab to form an L-shaped structural layer, and use a rubber mallet to tap the top surface of the inverted curb to compact the mortar. At the tongue and groove joints at both ends of the inverted curb, pour waterproof mortar and compact it. Step c: Construction of anti-cracking reinforcement layer: The inside corner between the concrete floor slab and the curb is cast into a rounded corner. An anti-cracking reinforcement layer is added to the vertical joint and the horizontal joint with the floor slab of the prefabricated assembled curb. The preparation steps of the anti-cracking reinforcement layer are as follows: Cement mortar slope layer, in sequence, a first waterproof layer, a middle polyester cloth, a second waterproof layer and a finishing layer are laid; Cement mortar leveling layer, in sequence, a first waterproof layer, a middle alkali-resistant fiberglass mesh, a second waterproof layer and a finishing layer are laid.

2. The processing technology of a seepage-resistant and durable precast assembled concrete inverted curb according to claim 1, characterized in that: The precast inverted curb consists of a rectangular steel frame formed by binding four longitudinal steel bars with a diameter of 10mm and stirrups with a diameter of 6mm and a spacing of 200mm. Concrete is poured on the outside to form the concrete curb body. A round-headed hanging nail is installed at each end of the curb at 1 / 5 to 1 / 4 of its length. A PVC pipe with a diameter of 100mm is installed along the length of the curb body in the middle, and is cut off at the hanging nail and sealed at both ends to form a closed cavity inside the curb body.

3. The processing technology of a seepage-resistant and durable precast assembled concrete inverted curb according to claim 1, characterized in that: The waterproof layer comprises the following components by weight: 45-95 parts polyurethane emulsion, 3-5 parts film-forming aid, 0.3-0.5 parts defoamer, 0.1-0.3 parts leveling agent, 5-15 parts titanium dioxide, 10-30 parts modified calcium carbonate, and 20-40 parts quartz sand.

4. The processing technology of a seepage-resistant and durable precast assembled concrete inverted curb according to claim 3, characterized in that: The polyurethane emulsion is prepared as follows: Modified polyester, sulfonate-grafted polyester diol, polyether polyol, and antioxidant are mixed evenly and vacuum dehydrated at 110-120℃ for 2-3 hours. The mixture is then cooled to 80-90℃, and under nitrogen protection, isophorone diisocyanate and dibutyltin dilaurate are added and mixed evenly. The mixture is reacted for 3-5 hours, followed by the addition of 2,2-dimethylolbutyric acid and acetone, and the reaction is continued for 3-5 hours. The mixture is then cooled to 30-40℃, and triethylamine is added for neutralization. Deionized water is then added for emulsification. The solvent acetone is removed under vacuum to obtain a polyurethane emulsion.

5. The processing technology of a seepage-resistant and durable precast assembled concrete inverted curb according to claim 4, characterized in that: The modified polyester is prepared as follows: Step 1: Under nitrogen protection, itaconic acid, succinic acid, ethylene glycol, isosorbide, hydroquinone and tetrabutyl titanate are mixed evenly and reacted at 160-170℃ for 2-3 hours. The vacuum degree of the system is controlled at 0.09MPa and the reaction is carried out at 160-170℃ for 5-7 hours. After cooling to room temperature, the product is purified and dried to obtain a polyester containing double bonds. Step 2: Under nitrogen protection, castor oil and 3-mercaptopropionic acid are mixed evenly, p-toluenesulfonic acid and p-hydroxyanisole are added, and the mixture is reacted at 80-90℃ for 20-24 hours. After washing and drying, castor oil-based thiol monomer is obtained. Step 3: Under nitrogen protection, octamethylcyclotetrasiloxane, pentamethylpentylcyclopentasiloxane and trifluoropropyltrimethylcyclotrisiloxane are mixed evenly, heated to 100-110℃, tetramethylammonium hydroxide and deionized water are added and mixed evenly, reacted for 3-5 hours, heated to 145-150℃ and kept at this temperature for 2-3 hours, and after vacuum distillation, hydroxyl-terminated fluorinated vinyl polysiloxane is obtained; Step 4: Mix the double-bonded polyester, hydroxyl-terminated fluorinated vinyl polysiloxane and castor oil-based thiol monomer evenly, add a photoinitiator, and irradiate with ultraviolet light for 30-60 minutes to obtain the modified polyester.

6. The processing technology of a seepage-resistant and durable precast assembled concrete inverted curb according to claim 5, characterized in that: The double-bonded polyester comprises the following components by weight: 15-18 parts itaconic acid, 6-8 parts succinic acid, 15-20 parts ethylene glycol, 5-8 parts isosorbide, 0.01-0.03 parts hydroquinone, and 0.01-0.03 parts tetrabutyl titanate.

7. The processing technology of a seepage-resistant and durable precast assembled concrete inverted curb according to claim 5, characterized in that: The mass ratio of the double-bonded polyester, the hydroxyl-terminated fluorinated vinyl polysiloxane, and the castor oil-based thiol monomer is 1:(0.3-0.5):(1-2):(0.1-0.3).

8. The processing technology of a seepage-resistant and durable precast assembled concrete inverted curb according to claim 3, characterized in that: The modified calcium carbonate is prepared as follows: Calcium carbonate and maleic anhydride are mixed and stirred at 90-120℃ for 0.5-1h to obtain calcium carbonate-maleic anhydride; calcium carbonate-maleic anhydride is mixed evenly with modified polyester at 20-25℃, tetrabutyl titanate is added, and the mixture is heated to 150-170℃ and stirred for 0.5-1h to obtain modified calcium carbonate.

9. The processing technology of a seepage-resistant and durable precast assembled concrete inverted curb according to claim 8, characterized in that: The mass ratio of calcium carbonate-maleic anhydride, modified polyester and tetrabutyl titanate is 1:(0.2-0.8):(0.03-0.05).

10. A permeable and durable precast concrete inverted wall prepared by the processing technology according to any one of claims 1-9.

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