CN107399921B - Capillary crystalline waterproof material and use method thereof - Google Patents
Capillary crystalline waterproof material and use method thereof Download PDFInfo
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- CN107399921B CN107399921B CN201710730911.3A CN201710730911A CN107399921B CN 107399921 B CN107399921 B CN 107399921B CN 201710730911 A CN201710730911 A CN 201710730911A CN 107399921 B CN107399921 B CN 107399921B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0042—Powdery mixtures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a permeable crystallization type waterproof material and a using method thereof, wherein the permeable crystallization type waterproof material comprises a water reducing agent, VAE rubber powder and a hyperbranched polymer; the VAE rubber powder, the hyperbranched polymer and the water reducing agent are prepared into premixed powder by a spray drying method and then are mixed with other raw materials. The elasticity of the cement-based permeable crystalline waterproof material is increased, the internal stress at the crack is reduced, and the compressive strength of the concrete is improved.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a permeable crystallization type waterproof material and a using method thereof.
Background
The shield segment is a main assembly component for shield construction, is the innermost barrier of the tunnel and plays a role in resisting soil layer pressure, underground water pressure and some special loads. The shield segment is a permanent lining structure of a shield tunnel, and the quality of the shield segment is directly related to the overall quality and safety of the tunnel, so that the waterproof performance and the durability of the tunnel are influenced.
The duct piece adopts a reinforced concrete structure as a main body, and concrete is easily subjected to physical, chemical and biological effects of the surrounding environment in the using process, so that certain components in the concrete are subjected to reaction denaturation, dissolution and precipitation, crystal expansion, matrix cracking and the like, and the problems of cracking, stripping, peeling, honeycomb, water leakage, steel bar exposure, steel bar corrosion, insufficient bearing capacity and the like are caused in the reduction of the performance of the concrete, so that the performance of the concrete is directly reduced, and the corrosion of the steel bars in the concrete is accelerated.
Chinese patent with the publication number of CN102167547A and publication date of 2011, 08 and 31 discloses a cement-based capillary crystalline waterproof material, which comprises the following components in percentage by weight: 30-50% of cement, 5-10% of expanding agent, 8-20% of quartz sand, 5-12% of mineral additive, 20-35% of water reducing agent, 0.2-1.0% of retarder, 1-15% of crystallization precipitator, 1-12% of complexing agent, 1-13% of calcium ion compensating agent and 0.1-1.0% of crystal growth agent.
The defects of the prior art are that the existing cement-based waterproof material is permeated and then subjected to crystal growth so as to fill micro cracks in concrete, the existing cement-based waterproof material is difficult to control the size of crystal growth, the grown crystals are rigid, internal stress is formed in the middle of cracks after the crystals grow, and the compressive strength of the concrete is reduced.
Disclosure of Invention
The invention aims to provide a permeable crystallization type waterproof material, which reduces internal stress at cracks and improves the compressive strength of concrete by increasing the elasticity of a cement-based permeable crystallization type waterproof material.
The technical purpose of the invention is realized by the following technical scheme:
a permeable crystallization type waterproof material comprises a water reducing agent, VAE rubber powder and a hyperbranched polymer; the VAE rubber powder, the hyperbranched polymer and the water reducing agent are prepared into premixed powder by a spray drying method and then are mixed with other raw materials.
By adopting the technical scheme, the VAE rubber powder is water-soluble latex powder, is dissolved in water and then permeates into the concrete cracks, and when water is evaporated, the elastomer is formed again and filled in the cracks, so that the internal stress is effectively relieved, and the integral compressive strength of the concrete is improved. The molecules of the hyperbranched polymer have a compact structure similar to a sphere, the hydrodynamic radius of gyration is small, molecular chain entanglement is less, so the viscosity is smaller, and the molecules have a plurality of hydroxyl, carboxyl and other end groups, so the mobility and the dispersibility of the redispersible latex powder are effectively improved, thereby being beneficial to assisting VAE rubber powder to improve the compressive strength of the repaired concrete. In use, the compatibility of the water reducing agent and cement is generally found to be poor, and the end groups in the hyperbranched polymer are beneficial to improving the compatibility of the water reducing agent and the cement, so that the water reducing effect is improved. The water reducing agent, the VAE rubber powder and the hyperbranched polymer are premixed, so that the uniformity of later mixing is improved, the spray-dried raw materials are easier to mix with other raw materials, the dispersibility in a cement matrix is better, the proportion is stable, and the carrying is convenient.
More preferably: the addition mass ratio of the VAE rubber powder to the hyperbranched polymer to the water reducer is 2-8: 1-5: 1-6.
More preferably: the feed comprises the following raw materials in parts by weight: cement: 42-60 parts; sodium silicate: 6-16 parts; complexing agent: 2-10 parts; powdery organic acid: 1-4 parts; styrene-butadiene latex: 10-20 parts of; fly ash: 15-20 parts of a solvent; pre-mixing powder: 4-20 parts.
By adopting the scheme, the cement is a matrix of the permeable crystallization type waterproof material and is used for improving the adhesion with a concrete matrix to be repaired, the sodium silicate is a main active substance of the permeable crystallization type waterproof material and has three functions, and part of the sodium silicate directly reacts with calcium ions in the concrete to directly generate insoluble crystals; the complex can carry out a complexing reaction with calcium ions in the concrete to form a soluble complex, the soluble complex migrates and permeates in the concrete, and after the soluble complex permeates to a certain depth, the soluble complex and the other part of sodium silicate carry out an ion exchange reaction to generate calcium silicate crystals, and the complexing agent recovers activity again and can continue to complex with the calcium ions in the concrete; the last part of sodium silicate reacts with the dissolved powdery organic acid to generate a cross-linked reticular silica gel elastomer, which is beneficial to improving the elasticity of cracks and effectively relieving internal stress, thereby improving the overall compressive strength of the concrete.
More preferably: the feed comprises the following raw materials in parts by weight: cement: 45 parts of (1); sodium silicate: 15 parts of (1); complexing agent: 6 parts of (1); powdery organic acid: 2 parts of (1); styrene-butadiene latex: 15; fly ash: 18 parts of a mixture; pre-mixing powder: 10 parts.
More preferably: the cement is silicate cement, and the adding mass ratio of the cement to the styrene-butadiene latex is 3: 1.
More preferably: the solid content of the styrene-butadiene latex is 45-55%.
More preferably: the water reducing agent is lignosulfonate.
More preferably: the preparation method of the premixed powder is as follows: adding the hyperbranched resin and the VAE rubber powder into a liquid storage tank of a spray dryer according to the formula amount, heating to be molten, adding the water reducing agent according to the formula amount, and starting spray drying operation after uniformly mixing; the parameters controlling the spray drying were as follows: the liquid pressure is 5-6MPa, the caliber of the nozzle is 0.6-1.0mm, the gas pressure is 0.6-1.2MPa, and the gas flow is 16-18m3/h。
The invention also aims to provide a use method of the permeable crystallization type waterproof material.
The technical purpose of the invention is realized by the following technical scheme:
a use method of a permeable crystallization type waterproof material comprises the following steps: s1: taking cement, sodium silicate, a complexing agent, powdery organic acid, fly ash, premixed powder and styrene-butadiene latex according to the formula amount for later use; taking cement, sodium silicate, a complexing agent, powdered organic acid, fly ash and water accounting for 30% of the total amount of the premixed powder for standby; s2: uniformly mixing cement, sodium silicate, a complexing agent, a powdery organic acid and fly ash according to the formula amount for later use; uniformly mixing the premixed powder, the styrene-butadiene latex and water, pouring the premixed powder into the mixed solution, and continuously uniformly stirring to prepare the required permeable crystallization type waterproof material; s3: pretreating the concrete surface at the crack before repairing to remove dirt on the surface of the base layer, and fully soaking the base layer concrete with water; and S4, coating the permeable crystallization type waterproof material on the treated surface, drying and curing.
In conclusion, the invention has the following beneficial effects: 1. the water reducing agent, the VAE rubber powder and the hyperbranched polymer are premixed, so that the uniformity of later mixing is improved, the spray-dried raw materials are easier to mix with other raw materials, the dispersibility in a cement matrix is better, the proportion is stable, and the carrying is convenient; 2. the VAE rubber powder is water-soluble latex powder, is dissolved in water and then permeates into the concrete cracks, and when water is evaporated, an elastomer is formed again and filled in the cracks, so that the internal stress is effectively relieved, and the integral compressive strength of the concrete is improved. The molecules of the hyperbranched polymer have a compact structure similar to a sphere, the hydrodynamic radius of gyration is small, molecular chain entanglement is less, so the viscosity is smaller, and the molecules have a plurality of hydroxyl, carboxyl and other end groups, so the mobility and the dispersibility of the redispersible latex powder are effectively improved, thereby being beneficial to assisting VAE rubber powder to improve the compressive strength of the repaired concrete. In use, the compatibility of the water reducing agent and cement is generally found to be poor, and the end groups in the hyperbranched polymer are beneficial to improving the compatibility of the water reducing agent and the cement, so that the water reducing effect is improved.
Detailed Description
The present invention will be described in further detail below.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the present invention.
Example 1: a premixed powder of VAE rubber powder, hyperbranched polymer and water reducer is prepared by the following method: weighing VAE rubber powder and hyperbranched polymer according to the mass ratio of 6:2:2And a water reducing agent for later use; adding the hyperbranched resin and the VAE rubber powder into a liquid storage tank of a spray dryer, heating to melt, adding the water reducing agent, and continuously stirring and uniformly mixing. Before starting the spray drying, the parameters for controlling the spray drying were as follows: the liquid pressure is 6MPa, the caliber of the nozzle is 0.8mm, the gas pressure is 1.0MPa, and the gas flow is 18m3/h。
Wherein the water reducing agent is lignosulfonate, the hyperbranched resin is hydroxyl-terminated hyperbranched polyester purchased from the market, the hydroxyl number of the hyperbranched polymer is 10-12/mol, the hydroxyl value is 600mg KOH/g, the acid value is less than 20mg KOH/g, and the molecular weight is 1100 g/mol.
Examples 2 to 6: the difference between the premixed powder of the VAE rubber powder, the hyperbranched polymer and the water reducing agent and the premixed powder of the embodiment 1 is that the adding proportion of the VAE rubber powder, the hyperbranched polymer and the water reducing agent is respectively 6:1:1, 2:1:1, 6:4:4, 6:5:5 and 8:5: 6.
Examples 7 to 12: a premixed powder of VAE glue powder, hyperbranched polymer and water reducing agent is different from that of example 1 in the parameters of spray drying, and the specific parameters are shown in Table 1.
TABLE 1 spray drying parameter Table for example 1 and examples 7-12
Example 13: a premixed powder of VAE glue powder, hyperbranched polymer and water reducing agent is distinguished from example 1 in that the hyperbranched resin is a hydroxyl-terminated hyperbranched polyester available on the market, the hyperbranched polymer has a hydroxyl number of 20-24/mol, a hydroxyl value of 560mg KOH/g, an acid value of less than 25mg KOH/g, and a molecular weight of 2400 g/mol.
The pre-mixed powders of examples 1-13 are labeled P1-P13, respectively.
Examples 14 to 26: a permeable crystallization type waterproof material comprises the following raw materials in parts by weight: cement: 45 parts of (1); sodium silicate: 15 parts of (1); complexing agent: 6 parts of (1); powdery organic acid: 2 parts of (1); styrene-butadiene latex: 15; fly ash: 18 parts of a mixture; pre-mixing powder: 10 parts.
Wherein the cement is siliconAcid salt cement; the molecular formula of the sodium silicate is SiO2·nNa2O·H2The value of O and n is 2.8; the complexing agent is EDTA, and the powdery organic acid is citric acid; the solid content of the styrene-butadiene latex is 50 percent; the premixed powders were P1-P13, respectively.
Examples 27 to 35: a permeable crystallization type waterproof material which is different from the one in example 14 in that each component is the same, but the content of each component is different; see table 2 for the components and amounts of examples 27-35.
TABLE 2 composition and content tables for example 14 and examples 27-35
Example 36: a water-repellent material of the penetrative crystalline type, which is different from that of example 14, wherein the styrene-butadiene latex has a solid content of 45%.
Example 37: a water-repellent material of the penetrative crystalline type, which is different from that of example 14, is 55% in terms of solid content in styrene-butadiene latex.
Examples 38 to 62: a use method of a permeable crystallization type waterproof material comprises the following steps:
s1: taking the cement, the sodium silicate, the complexing agent, the powdered organic acid, the fly ash, the premixed powder and the styrene-butadiene latex in the formula amount of the embodiment 14-37 for standby; taking cement, sodium silicate, a complexing agent, powdered organic acid, fly ash and water accounting for 30% of the total amount of the premixed powder for standby;
s2: uniformly mixing cement, sodium silicate, a complexing agent, a powdery organic acid and fly ash according to the formula amount for later use; uniformly mixing the premixed powder, the styrene-butadiene latex and water, pouring the premixed powder into the mixed solution, and continuously uniformly stirring to prepare the required permeable crystallization type waterproof material;
s3: before repairing, firstly, pretreating the concrete surface at the crack to remove floating ash, cement floating slurry, frost return, oil stain, dirt and the like on the surface of a base layer, and washing the concrete surface clean by water; removing the protrusions and pimples on the surface and loose parts such as crusts and layers, and washing the parts with water; removing loose stones on the honeycomb and pitted surface of the base concrete, and then fully soaking the base concrete with water;
s4: uniformly coating the cement-based capillary crystalline waterproof material on the surface of the treated segment by a circular coating method by using a semi-hard bristle brush or a nylon brush, and standing and drying the segment for 8 hours; after the pipe piece meets the condition of entering the maintenance pool, the pipe piece is immediately transported to the maintenance pool to be maintained by water for 7 days. Operation is noticed during the process of lightering and discharging, and the segment is prevented from being damaged by artificial factors. When the pipe is put into the pool, the temperature difference between the pipe piece and water is required to be not more than 20 ℃; when the pipe piece is maintained in water, the pipe piece is required to be completely immersed in the water; before the embedded part is hung in a water tank, butter must be coated on the embedded part with threads or a cover must be added on the embedded part with threads, so that the phenomenon that the embedded part is rusted or corroded is avoided. After the pipe pieces are lifted out of the water pool, the pipe pieces are placed on a storage yard for continuous 7 days for moisture preservation and maintenance.
Test part: the following comparative examples were made for comparison with the examples.
Comparative example 1: a water-repellent material of the infiltration crystalline type is different from that of example 14 in that an equal amount of premixed powder is directly mixed with other raw materials without spray-drying.
Comparative example 2: a water-repellent material of the osmotically crystalline type which is different from that of example 14 in that styrene-butadiene latex is not added.
The concrete compression resistance test before and after restoration:
(1) the test samples comprise examples 14-19, examples 26-35 and comparative examples 1-2, wherein the test samples are obtained by visual observation, selecting waste pipe pieces with the same type and relatively close crack degrees, uniformly selecting a 5 × 5 dot matrix on each pipe piece, testing the compressive strength of each pipe piece by using a concrete resiliometer, calculating an average value, selecting 54 pipe pieces with the closest compressive strength as test objects, sequentially arranging the 54 pipe pieces from low to high according to the average compressive strength, respectively taking 1 pipe piece from the pipe pieces arranged at positions 1-18, 19-36 and 37-54, combining the pipe pieces into one group, and repeating the steps until the compressive strength is higher, wherein each group comprises three, and 18 groups correspond to 18 test samples;
(2) b, after the repairing maintenance step is completed, taking a 5 × 5 lattice at the same position, testing the compressive strength of the lattice by using a concrete resiliometer, and calculating an average value, c, calculating the increase rate of the compressive strength of the segment, wherein the increase rate of the compressive strength is (the compressive strength after repairing-the compressive strength before repairing)/the compressive strength before repairing × 100%;
(3) and (3) test results: the test results are shown in table 3.
Table 3 concrete compression resistance test results before and after restoration
The results of comparative example 14 and comparative examples 1-2 show that mixing VAE rubber powder, hyperbranched polymer and water reducing agent into premixed powder before use has a critical effect on increasing the compressive strength growth rate of the repaired segment. The styrene-butadiene latex is added to play an auxiliary role, and the increase rate of the compressive strength of the repaired pipe piece can be improved.
As is clear from the results of comparative examples 14 to 19, the increase rate of compressive strength tends to increase and decrease with increasing addition ratio of the VAE powder, the hyperbranched polymer and the water reducing agent in the premixed powder under the condition that the total amount of the premixed powder added is not changed, and the highest increase rate of compressive strength is achieved when the ratio of the VAE powder, the hyperbranched polymer and the water reducing agent in the premixed powder is 6:2: 2.
The results of comparative example 14 and examples 30 to 33 show that as the addition amount of the premixed powder in the system increases, the increase rate of the compressive strength of the repaired segment tends to increase first and then decrease, and the analysis reason is that as the addition amounts of the VAE rubber powder and the hyperbranched polymer increase, the crack is repaired, the content of the elastomer at the crack increases, which is beneficial to reducing the generation of internal stress, so that the compressive strength of the concrete is improved, and as the content of the elastomer further increases, the strength of the cement-based permeable crystalline waterproof material at the crack decreases, so that the increase rate of the strength of the concrete is reduced on the contrary.
The test results of comparative example 14 and examples 27 to 29 show that, as the addition amount of the styrene-butadiene latex increases, the increase rate of the compressive strength of the repaired segment tends to increase first and then decrease, and the analysis reason is that as the addition amount of the styrene-butadiene latex increases, the cracks are repaired, the elastomer content at the cracks increases, which is beneficial to reducing the generation of internal stress, so that the compressive strength of the concrete is improved, and as the elastomer content further increases, the strength of the permeable crystallization type waterproof material at the cracks is reduced, so that the increase rate of the strength of the concrete is reduced on the contrary.
Claims (7)
1. A permeable crystallization type waterproof material is characterized by comprising a water reducing agent, VAE rubber powder and a hyperbranched polymer; the VAE rubber powder, the hyperbranched polymer and the water reducer are prepared into premixed powder by a spray drying method and then are mixed with other raw materials; the addition mass ratio of the VAE rubber powder to the hyperbranched polymer to the water reducer is 2-8: 1-5: 1 to 6; the permeable crystallization type waterproof material comprises the following raw materials in parts by weight: cement: 42-60 parts; sodium silicate: 6-16 parts; complexing agent: 2-10 parts; powdery organic acid: 1-4 parts; styrene-butadiene latex: 10-20 parts of; fly ash: 15-20 parts of a solvent; pre-mixing powder: 4-20 parts.
2. The permeable crystalline waterproof material as claimed in claim 1, wherein: the feed comprises the following raw materials in parts by weight: cement: 45 parts of (1); sodium silicate: 15 parts of (1); complexing agent: 6 parts of (1); powdery organic acid: 2 parts of (1); styrene-butadiene latex: 15; fly ash: 18 parts of a mixture; pre-mixing powder: 10 parts.
3. The permeable crystalline waterproof material as claimed in claim 1, wherein: the cement is silicate cement, and the adding mass ratio of the cement to the styrene-butadiene latex is 3: 1.
4. The permeable crystalline waterproof material as claimed in claim 1, wherein: the solid content of the styrene-butadiene latex is 45-55%.
5. The permeable crystalline waterproof material as claimed in claim 1, wherein: the water reducing agent is lignosulfonate.
6. The permeable crystalline waterproof material as claimed in claim 1, wherein: the preparation method of the premixed powder comprises the following steps: adding the hyperbranched polymer and the VAE rubber powder into a liquid storage tank of a spray dryer according to the formula amount, heating to be molten, adding the water reducing agent according to the formula amount, and starting spray drying operation after uniformly mixing; the parameters controlling the spray drying were as follows: the liquid pressure is 5-6MPa, the caliber of the nozzle is 0.6-1.0mm, the gas pressure is 0.6-1.2MPa, and the gas flow is 16-18m 3/h.
7. A method of using a permeable crystalline waterproofing material according to claim 1, comprising the steps of: s1: taking cement, sodium silicate, a complexing agent, powdery organic acid, fly ash, premixed powder and styrene-butadiene latex according to the formula amount for later use; taking cement, sodium silicate, a complexing agent, powdered organic acid, fly ash and water accounting for 30% of the total amount of the premixed powder for standby; s2: uniformly mixing cement, sodium silicate, a complexing agent, a powdery organic acid and fly ash according to the formula amount for later use; uniformly mixing the premixed powder, the styrene-butadiene latex and water, pouring the premixed powder into the mixed solution, and continuously uniformly stirring to prepare the required permeable crystallization type waterproof material; s3: pretreating the concrete surface at the crack before repairing to remove dirt on the surface of the base layer, and fully soaking the base layer concrete with water; and S4, coating the permeable crystallization type waterproof material on the treated surface, drying and curing.
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| CN108191459A (en) * | 2018-01-29 | 2018-06-22 | 云南森博混凝土外加剂有限公司 | Concrete enhances the preparation method of renovation agent |
| CN108191296A (en) * | 2018-03-23 | 2018-06-22 | 常德市万福达环保节能建材有限公司 | A kind of concrete waterproofer |
| CN112142437B (en) * | 2020-09-14 | 2022-03-18 | 安徽朗凯奇防水科技股份有限公司 | Cement-based capillary crystalline waterproof material and preparation method thereof |
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| CN102464476A (en) * | 2010-11-16 | 2012-05-23 | 上海高科建筑防水涂料厂 | Cement-based permeable crystallization type waterproof coating |
| CN103588442A (en) * | 2013-11-09 | 2014-02-19 | 青岛益群漆业集团有限公司 | Development of cement-based permeable crystallization anti-acid waterproof coating |
| CN104355584A (en) * | 2014-10-24 | 2015-02-18 | 上海宝田新型建材有限公司 | Cementitious capillary crystalline waterproofing building material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102464476A (en) * | 2010-11-16 | 2012-05-23 | 上海高科建筑防水涂料厂 | Cement-based permeable crystallization type waterproof coating |
| CN103588442A (en) * | 2013-11-09 | 2014-02-19 | 青岛益群漆业集团有限公司 | Development of cement-based permeable crystallization anti-acid waterproof coating |
| CN104355584A (en) * | 2014-10-24 | 2015-02-18 | 上海宝田新型建材有限公司 | Cementitious capillary crystalline waterproofing building material |
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