CN112299750A - Water-based capillary crystalline waterproofing agent - Google Patents
Water-based capillary crystalline waterproofing agent Download PDFInfo
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- CN112299750A CN112299750A CN202011277494.XA CN202011277494A CN112299750A CN 112299750 A CN112299750 A CN 112299750A CN 202011277494 A CN202011277494 A CN 202011277494A CN 112299750 A CN112299750 A CN 112299750A
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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
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/65—Water proofers or repellants
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The water-based capillary crystalline waterproofing agent is characterized by being prepared from the following components in parts by mass: 40-60 parts of organic silicon monomer, 6-9 parts of surfactant, 6-9 parts of high-molecular film forming agent, 10-15 parts of nano silicon dioxide, 10-15 parts of non-crystalline calcium aluminate, 6-9 parts of calcium hydroxide and 50-70 parts of water. The waterproof agent disclosed by the invention has very strong permeability, can permeate 3-8 cm below the surface layer of concrete, and the formed eutectic grows along the capillary pores of the concrete all the time, so that all pores of the concrete are blocked, the compactness of the concrete can be enhanced, the strength and hardness of a concrete base material can be enhanced, and the waterproof effect with the same service life as that of the concrete is realized; the invention can improve the plasticity of the concrete and the mortar, and the weathering resistance, the shrinkage resistance and the seepage resistance of the concrete are further improved; easy construction and low cost.
Description
Technical Field
The invention relates to a crystalline waterproof agent, in particular to a permeable crystalline waterproof agent.
Background
With the continuous development of the Chinese engineering construction, the corresponding problems of water seepage of houses and floors are also endless. The demand for waterproof materials is also increasing. At present, the types of waterproof materials in China are complex, and the waterproof technology is continuously updated. The waterproof materials are 5 categories including waterproof coiled materials, waterproof coatings, plugging materials and the like.
A cement-base permeable crystallization type water-proof paint is a slurry material which is prepared from inorganic cementing material as main component, active chemical substance and a certain amount of mixed material through mixing with water, stirring, and brushing or spraying on the surface of base material, or directly pressing on the surface of cement concrete in the form of dry powder. The cement-based permeable crystalline waterproof coating is a novel waterproof material, and is applied to construction engineering because the cement-based permeable crystalline waterproof coating belongs to an inorganic waterproof system, the coating has high compatibility with a cement concrete system, and the initial purpose of the cement-based permeable crystalline waterproof coating is mainly applied to solving the problem of water leakage of a cement ship. The material is mainly applied to the surface of inorganic materials.
CN103803833A discloses an aqueous capillary crystalline waterproofing agent and a preparation and use method thereof, wherein soluble ammonium substances such as ammonium carbonate, ammonium bicarbonate, ammonium oxalate, ammonium phosphate and diammonium hydrogen phosphate and nano-silica are adopted as main raw materials to prepare the aqueous capillary crystalline waterproofing agent. The main components are as follows: water, penetrant, defoaming agent, nano silicon dioxide and single or composite soluble ammonium salt. The weight percentage of each component is as follows: 0.1-0.5% of penetrating agent, 0.1-0.5% of defoaming agent, 0.1-5% of nano silicon dioxide, 0-50% of ammonium carbonate, or 0-19% of ammonium bicarbonate, or 0-6% of ammonium oxalate, or 0-21% of ammonium phosphate, or 0-38% of diammonium hydrogen phosphate, and the balance of water. The scheme belongs to an inorganic waterproof agent, and is not resistant to scouring and not strong in durability.
CN111620715A discloses a water-based capillary crystalline concrete surface repairing reinforcing material, a preparation method and an application thereof, and the material comprises 48-60 parts of lithium silicate, 20-28 parts of potassium silicate, 24-30 parts of sodium silicate, 2-10 parts of organic silicon, 0.5-2 parts of a coagulant, 0.8-1.8 parts of a waterproof agent, 0.1-0.25 part of a surfactant, 0.2-1 part of a reaction retarder, 0.1-0.24 part of an anti-freezing agent, 0.6-1.2 parts of fluorosilicate, 0.1-0.2 part of a defoaming agent, 0.08-0.16 part of a multifunctional assistant, 0.5-2 parts of an early strength agent and 95-115 parts of water. The main waterproof component of the scheme is still inorganic matter, is not resistant to scouring and has high requirements on construction conditions.
CN101619203A discloses an aqueous capillary crystalline waterproofing agent and a preparation method thereof, which consists of tartaric acid, sodium fluoride, silica sol, silane emulsion and water and is an aqueous waterproofing additive consisting of a plurality of active chemical components. In the scheme, the sodium fluoride is weakly alkaline when dissolved in water, has poor compatibility with tartaric acid and silica sol, and is not favorable for long-term stability of the waterproof agent.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and providing the water-based capillary crystalline waterproofing agent which has good waterproof performance and improves the mechanical property of concrete.
The technical scheme adopted by the invention for solving the technical problems is as follows: the water-based capillary crystalline waterproofing agent is prepared from the following components in parts by weight: 40-60 parts of organic silicon monomer, 6-9 parts of surfactant, 6-9 parts of high-molecular film forming agent, 10-15 parts of nano silicon dioxide, 10-15 parts of non-crystalline calcium aluminate, 6-9 parts of calcium hydroxide and 50-70 parts of water.
Preferably, the organosilicon monomer is one or more than two of sodium silicate, sodium methyl silanol and potassium silicate.
Preferably, the surfactant is one or more than two of OP-10, NP-10, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate.
Preferably, the macromolecular film forming agent is one or more than two of polyacrylic acid, polyisobutylene and polyamide wax.
Preferably, the average particle size of the nano-silica is 100-200 nm.
Preferably, the amorphous calcium aluminate has an amorphous rate of 90% or more and a specific surface area of 4000-5500cm2(ii) in terms of/g. The property of the non-crystalline calcium aluminate is higher than the reactivity of a crystalline product, and the non-crystalline calcium aluminate can achieve higher reactivity and efficiency when being matched with common silicate for use. After the component is introduced into the main formula, the noncrystalline calcium aluminate is mixed withThe gypsum and water can react quickly to generate ettringite; in addition, the ettringite has stable structure and good strength. Meanwhile, the ettringite expands in volume to form prestress and shrinkage resistance, so that the strength, the cracking resistance and the durability of the concrete are greatly improved.
Preferably, the calcium hydroxide is technical grade calcium hydroxide.
Compared with the prior art, the invention has the following beneficial effects:
(1) the amorphous calcium aluminate component in the water-based permeable crystallization type waterproofing agent can rapidly generate ettringite with gypsum and water, can improve the internal microstructure of concrete, and simultaneously plays a certain early strength role; the nano silicon dioxide can react with cement hydration products in the inner pores of the concrete to generate insoluble crystals, so that the capillary pores of the concrete are blocked, and the effects of compaction and water resistance are achieved; the macromolecular film-forming agent plays an auxiliary role in water resistance and permeability resistance and is also used as a complexing agent of the active nano silicon dioxide;
(2) the waterproof agent disclosed by the invention has strong permeability, can permeate 3-8 cm below the surface layer of concrete, and can chemically react with free alkali in the concrete to generate an irreversible composite silica eutectic, and the eutectic has growth performance, and can grow along the capillary pores of the concrete when being contacted with water and calcareous ions in the concrete again, so that all pores of the concrete are blocked, the compactness of the concrete is enhanced, the strength and the hardness of a concrete base material are enhanced, and the waterproof effect which has the same service life as the concrete in a real sense is achieved;
(3) the invention not only has the waterproof and moisture-proof functions of the common waterproof agent, but also can improve the plasticity of concrete and mortar, and further improve the weathering resistance, shrinkage resistance and seepage pressure resistance of the concrete;
(4) the construction process is simple and the cost is low.
Detailed Description
The present invention is further illustrated by the following examples.
The starting materials used in the examples of the present invention were all obtained from conventional commercial sources.
The non-crystalline calcium aluminate used in the embodiment of the invention has the non-crystallization rate of more than 90 percent and the specific surface area of 4000-5500cm2/g。
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The components of the embodiments 1-5 of the invention are as follows:
example 1:
example 2:
example 3:
example 4:
example 5:
detection of water resistance
The aqueous capillary crystalline waterproofing agents prepared in examples 1 to 5 were added to concrete in an amount of 2% (based on the total weight of the cementitious material), and tested according to GB18445-2012 "cementitious capillary crystalline waterproofing materials", JC474-2008 "mortar and concrete waterproofing agents", and GB8076-2008 "concrete admixture specifications", and the test results are shown in table 1.
TABLE 1 results of testing the water repellency of the water-based capillary crystalline water repellent obtained in examples 1 to 5
As can be seen from Table 1, the tested concrete of 5 samples of examples doped with the water-based capillary crystalline waterproofing agent of the invention has the penetration height ratio of less than 30 percent and the water permeation resistance pressure ratio improved by about 335 percent; the compressive strength ratio of 7d to 28d is more than 105%, the water absorption in 48 hours is less than 50%, and the performance of the whole tested concrete is excellent. Through detection, the penetration depth of the waterproof agent can reach 3-8 cm.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may include only a single embodiment, and such description is for clarity only, and those skilled in the art will be able to make the description as a whole, and the embodiments may be suitably combined to form other embodiments as will be apparent to those skilled in the art.
Claims (10)
1. The water-based capillary crystalline waterproofing agent is characterized by being prepared from the following components in parts by mass: 40-60 parts of organic silicon monomer, 6-9 parts of surfactant, 6-9 parts of high-molecular film forming agent, 10-15 parts of nano silicon dioxide, 10-15 parts of non-crystalline calcium aluminate, 6-9 parts of calcium hydroxide and 50-70 parts of water.
2. The aqueous capillary crystalline waterproofing agent according to claim 1, wherein the silicone monomer is one or more of sodium silicate, sodium methyl siliconate and potassium silicate.
3. The aqueous capillary crystalline waterproofing agent according to claim 1 or 2, wherein the surfactant is one or more of OP-10, NP-10, sodium dodecylbenzenesulfonate and sodium dodecylsulfate.
4. The aqueous capillary crystalline waterproofing agent according to claim 1 or 2, wherein the polymeric film forming agent is one or more of polyacrylic acid, polyisobutylene, and polyamide wax.
5. The aqueous capillary crystalline waterproofing agent according to claim 3, wherein the polymeric film forming agent is one or more of polyacrylic acid, polyisobutylene, and polyamide wax.
6. The aqueous capillary crystalline waterproofing agent according to claim 1 or 2, wherein the average particle diameter of the nano silica is 100-200 nm.
7. The aqueous capillary crystalline waterproofing agent according to claim 3, wherein the average particle diameter of the nano silica is 100-200 nm.
8. The aqueous capillary crystalline waterproofing agent according to claim 4, wherein the average particle diameter of the nano silica is 100-200 nm.
9. The aqueous capillary crystalline waterproofing agent according to any one of claims 1 to 8, wherein the amorphous calcium aluminate has an amorphous rate of 90% or more and a specific surface area of 4000-5500cm2/g。
10. The aqueous capillary crystalline waterproofing agent according to any one of claims 1 to 9, wherein the calcium hydroxide is industrial-grade calcium hydroxide.
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| CN202011277494.XA CN112299750A (en) | 2020-11-16 | 2020-11-16 | Water-based capillary crystalline waterproofing agent |
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| CN202011277494.XA CN112299750A (en) | 2020-11-16 | 2020-11-16 | Water-based capillary crystalline waterproofing agent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113135685A (en) * | 2021-04-30 | 2021-07-20 | 中海建筑有限公司 | Waterproof material, cement and concrete |
| CN113336573A (en) * | 2021-06-15 | 2021-09-03 | 浙江省二建建设集团有限公司 | Construction method for preventing seepage and hydrophobization of concrete surface and seepage-prevention hydrophobization structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113135685A (en) * | 2021-04-30 | 2021-07-20 | 中海建筑有限公司 | Waterproof material, cement and concrete |
| CN113336573A (en) * | 2021-06-15 | 2021-09-03 | 浙江省二建建设集团有限公司 | Construction method for preventing seepage and hydrophobization of concrete surface and seepage-prevention hydrophobization structure |
| CN113336573B (en) * | 2021-06-15 | 2022-06-10 | 浙江省二建建设集团有限公司 | Construction method for preventing seepage and hydrophobization of concrete surface and seepage-prevention hydrophobization structure |
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Application publication date: 20210202 |
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