CN117229084A - Water-based permeable crystallization waterproof agent and preparation method thereof - Google Patents
Water-based permeable crystallization waterproof agent and preparation method thereof Download PDFInfo
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 139
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 238000002425 crystallisation Methods 0.000 title claims abstract description 62
- 230000008025 crystallization Effects 0.000 title claims abstract description 62
- 238000002360 preparation method Methods 0.000 title abstract description 16
- 239000008139 complexing agent Substances 0.000 claims abstract description 33
- 230000036571 hydration Effects 0.000 claims abstract description 31
- 238000006703 hydration reaction Methods 0.000 claims abstract description 31
- 239000004094 surface-active agent Substances 0.000 claims abstract description 27
- 239000000080 wetting agent Substances 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 12
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 claims description 30
- 239000011259 mixed solution Substances 0.000 claims description 28
- PEDCQBHIVMGVHV-UHFFFAOYSA-N glycerol group Chemical group OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 24
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 21
- 239000004115 Sodium Silicate Substances 0.000 claims description 18
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 18
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims description 17
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical group C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 16
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 16
- 239000000176 sodium gluconate Substances 0.000 claims description 16
- 235000012207 sodium gluconate Nutrition 0.000 claims description 16
- 229940005574 sodium gluconate Drugs 0.000 claims description 16
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 15
- 239000004280 Sodium formate Substances 0.000 claims description 15
- 239000001530 fumaric acid Substances 0.000 claims description 15
- 239000001632 sodium acetate Substances 0.000 claims description 15
- 235000017281 sodium acetate Nutrition 0.000 claims description 15
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical group [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 claims description 15
- 235000019254 sodium formate Nutrition 0.000 claims description 15
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 15
- 238000004078 waterproofing Methods 0.000 claims description 15
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 claims description 14
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical group OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 12
- 239000002202 Polyethylene glycol Substances 0.000 claims description 10
- 229920001223 polyethylene glycol Polymers 0.000 claims description 10
- 230000035515 penetration Effects 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 7
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical group [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- 230000002528 anti-freeze Effects 0.000 claims description 4
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 claims description 2
- KCIDZIIHRGYJAE-YGFYJFDDSA-L dipotassium;[(2r,3r,4s,5r,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl] phosphate Chemical compound [K+].[K+].OC[C@H]1O[C@H](OP([O-])([O-])=O)[C@H](O)[C@@H](O)[C@H]1O KCIDZIIHRGYJAE-YGFYJFDDSA-L 0.000 claims description 2
- 229940009662 edetate Drugs 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000002940 repellent Effects 0.000 claims 2
- 239000005871 repellent Substances 0.000 claims 2
- 238000005336 cracking Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 34
- 239000000377 silicon dioxide Substances 0.000 description 17
- 235000012239 silicon dioxide Nutrition 0.000 description 15
- 239000004568 cement Substances 0.000 description 12
- 239000002245 particle Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 description 7
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000010257 thawing Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 2
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- 239000011148 porous material Substances 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000005653 Brownian motion process Effects 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 238000005537 brownian motion Methods 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 229920005551 calcium lignosulfonate Polymers 0.000 description 1
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- 230000002349 favourable effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- 238000011056 performance test Methods 0.000 description 1
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- 230000008023 solidification Effects 0.000 description 1
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Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of building waterproof materials, in particular to a water-based permeable crystallization waterproof agent and a preparation method thereof, wherein the waterproof agent comprises the following raw materials in percentage by weight: 0.2 to 0.5 percent of crystallization agent, 1 to 1.4 percent of wetting agent, 0.3 to 0.5 percent of antifreezing agent, 0.49 to 0.75 percent of early strength agent, 0.005 to 0.01 percent of surfactant, 2.8 to 3.2 percent of hydration accelerator, 0.36 to 0.45 percent of retarder, 0.01 to 0.02 percent of complexing agent and the balance of water. The water-based permeable crystallization waterproof agent provided by the invention combines specific component proportions and processes, so that the prepared water-based permeable crystallization waterproof agent can be directly sprayed on the surface of formed concrete, so that the concrete has excellent waterproof impermeability, self-repairing property and durability, the low temperature resistance of the concrete is improved, and the phenomenon of frost heaving or frost cracking of the concrete is effectively avoided; the preparation method is simple, the sources of raw materials are wide, the construction amount per unit area is small, and the cost is low.
Description
Technical Field
The invention relates to the technical field of building waterproof materials, in particular to a water-based permeable crystallization waterproof agent and a preparation method thereof.
Background
The tensile strength and ultimate tensile strain of the concrete are low, when the tensile stress in the concrete is larger than the tensile strength of the concrete due to volume shrinkage deformation caused by shrinkage in the cement hardening process, the concrete can crack, so that the impermeability is poor, and the durability and the safety are influenced; the concrete is used as a non-uniform material, and based on a macroscopic angle, the concrete is composed of aggregate particles with different sizes and shapes and discontinuous hydrated cement paste; on a microscopic scale, concrete is composed of tiny voids of varying sizes that are unevenly distributed, and when they form interpenetrating passages, they are subject to attack by moisture in the natural environment, thereby destroying their durability. In addition, due to the hydration property and shrinkage property of the cement-based material, the risk of frost heaving or frost cracking easily occurs at low temperature, and the service life of the building can be directly influenced. Thus, water seepage, cracking and frost heaving of concrete are currently existing and are in need of solution.
In recent years, the technology of a penetrating crystallization waterproof agent has the same life as that of a building structure, and thus has become a research hotspot in the field, but many penetrating crystallization waterproof agents are mainly cement-based penetrating crystallization waterproof materials in a powdery state at present, and have the following disadvantages: the coating is easy to wash out by rain in rainy days before solidification; the coating is easy to peel and fall off in a dry environment; the cement-based waterproof material takes a long time to take effect, and can achieve the best effect only by 28 days, so that the actual waterproof effect is influenced; the effective components are lower, the dosage per unit area is large, and the comprehensive cost is high.
In view of the above, development of a novel aqueous penetrating crystallization waterproof agent to solve the above technical problems would play a very important role in concrete.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the water-based permeable crystallization waterproof agent and the preparation method thereof, the waterproof agent can be directly sprayed on the surface of formed concrete, penetrates into the substrate through the surface, reacts with free alkali substances in the concrete to form inert crystals which can be embedded into capillary pores of the concrete, not only improves the compactness and the compressive strength of the concrete, but also has good waterproof and anti-permeability effects, and simultaneously has excellent low-temperature resistance, and effectively prevents the phenomenon of frost heaving or frost cracking of the concrete; the preparation method is simple, the sources of raw materials are wide, the construction amount per unit area is small, and the cost is low.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the first aspect of the invention provides an aqueous penetrating crystallization waterproof agent, which comprises the following raw materials in percentage by weight: 0.2 to 0.5 percent of crystallization agent, 1 to 1.4 percent of wetting agent, 0.3 to 0.5 percent of antifreezing agent, 0.49 to 0.75 percent of early strength agent, 0.005 to 0.01 percent of surfactant, 2.8 to 3.2 percent of hydration accelerator, 0.36 to 0.45 percent of retarder, 0.01 to 0.02 percent of complexing agent and the balance of water.
In some embodiments, the crystallization agent comprises sodium silicate and/or nano-silica sol.
Preferably, the crystallizing agent comprises sodium silicate and nano silica sol, and the weight ratio of the sodium silicate to the nano silica sol is 1: (1-3).
In some embodiments, the nano-silica sol has a silica content of 30% and a silica particle size of 10-15nm.
The source of the nano silica sol is not particularly limited, and the nano silica sol can be obtained through commercial purchase, including but not limited to the nano silica sol purchased from Shandong Baite New Material Co., ltd, and the model is SS3015.
Many cement agent penetrating crystallization waterproof materials in the market have better impermeability and self-repairing performance, but the durability is poorer, the specific regulation and control among component proportions are carried out, and particularly, the specific crystallization agent and complexing agent are added, and particularly, the crystallization agent is sodium silicate and nano silica sol, the complexing agent is disodium ethylenediamine tetraacetate, so that the prepared water-based penetrating crystallization waterproof agent has excellent waterproof impermeability, self-repairing performance and durability, and the applicant considers that possible reasons are that the crystallization component and the complexing agent can penetrate into a substrate from the surface under the action of the driving force of Brownian motion, chemical potential gradient or dry particle reaction through water in the waterproof agent, on one hand, the complexing agent and free calcium ions in concrete are rapidly complexed to form an unstable complex to fill capillary walls of the concrete to play a waterproof effect, and when the complex encounters sodium silicate and nano silica sol with higher activity, the complexing group is substituted to generate stable and water-insoluble inert crystals to further fill pores and cracks of the concrete to realize self-repairing function, and the compactness and strength of the concrete are improved; meanwhile, free radicals in the complexing agent are released, continue to migrate through water molecules in the interior and cannot be consumed, and the cyclic reaction promotes crystallization, so that the problem that silicate particles cannot react in time in a lower concentration range and cannot be filled when the waterproof agent is applied to concrete is effectively solved. When the moisture is lack as a medium in a dry state of the concrete, the complexing agent free radical is in a dormant state, and when the moisture is permeated, the substance can be activated again, so that new crystal generation is promoted, and the structural compactness of the concrete is improved.
In some embodiments, the wetting agent is polyethylene glycol having a molecular weight of 400-800.
Preferably, the wetting agent is polyethylene glycol having a molecular weight of 600.
The source of the polyethylene glycol is not particularly limited, and the polyethylene glycol can be obtained through commercial purchase.
In some embodiments, the antifreeze is glycerol or ethylene glycol.
Preferably, the antifreeze is glycerol.
In some embodiments, the early strength agent is sodium formate and sodium acetate in a weight ratio of 1: (4-11).
Preferably, the early strength agent is sodium formate and sodium acetate, and the weight ratio of the sodium formate to the sodium acetate is 1:7.5.
in some embodiments, the surfactant is sodium lignosulfonate or calcium lignosulfonate.
Preferably, the surfactant is sodium lignin sulfonate.
In some embodiments, the hydration accelerator comprises triethanolamine and diethanol monoisopropanolamine added in an amount of 0.15 to 0.4wt% of the triethanolamine.
Preferably, the diethanol monoisopropanolamine is added in an amount of 0.2 to 0.3wt% of the triethanolamine.
In some embodiments, the retarder is sodium gluconate and fumaric acid added in an amount of 2-3wt% of the sodium gluconate.
Preferably, the retarder is sodium gluconate and fumaric acid, and the adding amount of the fumaric acid is 2.4-2.6wt% of the sodium gluconate
In some embodiments, the complexing agent is disodium edetate or dipotassium edetate.
Preferably, the complexing agent is disodium edetate.
The invention adds specific early strength agent and hydration accelerator, which not only can enhance the early strength performance and crack resistance of concrete, but also can make the obtained waterproofing agent change free water in the concrete mixture into tiny dispersion, accelerate the hydration of cement, be favorable for the cement hydration to generate more water-containing crystal products in early stage, reduce the free water in the concrete, namely reduce capillary holes left by the evaporation of the free water, thereby improving the impermeability of the concrete.
The addition of the surfactant and the wetting agent not only can reduce the surface tension of water and the interfacial tension between cement particles, but also is beneficial to the penetration from the surface of concrete to the inside and improves the penetration depth of the waterproof agent; and the anti-freezing agent and the antifreezing agent in the system form a synergistic effect, so that the anti-seepage freeze-thawing performance of the concrete is improved, and the phenomenon of frost heaving or frost cracking of the concrete is effectively avoided.
The second aspect of the present invention provides a method for producing an aqueous penetrating crystallization waterproofing agent, comprising the steps of:
s1, adding a crystallizing agent into water, stirring for 10-20min at the rotating speed of 400-600r/min, heating to 50-60 ℃, preserving heat for 1-2h, and then cooling to room temperature to obtain a mixed solution A;
s2, adding a surfactant, a wetting agent, an antifreezing agent, a retarder and a complexing agent into the mixed solution A, and stirring for 5-10min at the rotating speed of 600-800r/min to obtain a mixed solution B;
s3, adding an early strength agent, a water reducing agent and a hydration accelerator into the mixed solution B, stirring for 8-12min at the rotating speed of 200-300r/min, standing for 1-2h, and discharging to obtain the water-based permeable crystallization waterproof agent.
The invention combines specific component proportion and process, can directly spray the prepared water-based permeable crystallization waterproof agent on the surface of the formed concrete, has excellent waterproof and impervious properties and good low temperature resistance, and has simple process and construction amount of 500g/m per unit area 2 The cost is low.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the invention, through specific regulation and control among component proportions, in particular adding a specific crystallizing agent and a complexing agent, wherein the crystallizing agent is sodium silicate and nano silica sol, and the complexing agent is disodium ethylenediamine tetraacetate, the prepared water-based permeable crystallization waterproof agent has excellent waterproof impermeability, self-repairing property and durability;
(2) According to the invention, by adding the specific early strength agent and the hydration accelerator, the early strength performance and crack resistance of the concrete can be enhanced, and the obtained waterproof agent can enable free water in the concrete mixture to become tiny and disperse, so that the hydration of cement is accelerated, more water-containing crystal products can be generated in early stage of cement hydration, and the impermeability of the concrete is improved;
(3) According to the invention, by adding the surfactant and the wetting agent, the surface tension of water and the interfacial tension between cement particles can be reduced, so that the penetration from the surface of concrete to the inside is facilitated, and the penetration depth of the waterproof agent is improved; but also can form a synergistic effect with the antifreezing agent in the system, so that the anti-seepage freeze thawing performance of the concrete is improved together, and the phenomenon of frost heaving or frost cracking of the concrete is effectively avoided;
(4) The invention combines specific component proportion and process, can directly spray the prepared water-based permeable crystallization waterproof agent on the surface of the formed concrete, has excellent waterproof and impervious properties and good low temperature resistance, and has simple process and construction amount of 500g/m per unit area 2 The cost is low.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The water-based permeable crystallization waterproof agent comprises the following raw materials in percentage by weight: 0.3% of crystallization agent, 1.2% of wetting agent, 0.4% of antifreezing agent, 0.62% of early strength agent, 0.008% of surfactant, 3.0% of hydration accelerator, 0.4% of retarder, 0.02% of complexing agent and the balance of water.
The crystallizing agent comprises sodium silicate and nano silica sol, and the weight ratio of the sodium silicate to the nano silica sol is 1:2.
the content of silicon dioxide in the nano silica sol is 30%, the particle size of the silicon dioxide is 10-15nm, and the silicon dioxide is purchased from Shandong Baite New Material Co., ltd, and the model is SS3015.
The wetting agent is polyethylene glycol with molecular weight of 600; the antifreezing agent is glycerol; the early strength agent is sodium formate and sodium acetate, and the weight ratio of the sodium formate to the sodium acetate is 1:7.5; the surfactant is sodium lignin sulfonate; the hydration accelerator comprises triethanolamine and diethanol monoisopropanolamine, wherein the addition amount of the diethanol monoisopropanolamine is 0.25wt% of the triethanolamine; the retarder is sodium gluconate and fumaric acid, and the adding amount of the fumaric acid is 2.5wt% of the sodium gluconate; the complexing agent is disodium ethylenediamine tetraacetate.
The preparation method of the water-based permeable crystallization waterproof agent comprises the following steps:
s1, adding a crystallizing agent into water, stirring for 15min at a rotating speed of 500r/min, heating to 55 ℃, preserving heat for 1.5h, and then cooling to room temperature to obtain a mixed solution A;
s2, adding a surfactant, a wetting agent, an antifreezing agent, a retarder and a complexing agent into the mixed solution A, and stirring at the rotating speed of 700r/min for 8min to obtain a mixed solution B;
s3, adding an early strength agent, a water reducing agent and a hydration accelerator into the mixed solution B, stirring for 10min at the rotating speed of 250r/min, standing for 1.5h, and discharging to obtain the water-based permeable crystallization waterproof agent.
Example 2
The water-based permeable crystallization waterproof agent comprises the following raw materials in percentage by weight: 0.2% of crystallization agent, 1% of wetting agent, 0.3% of antifreezing agent, 0.49% of early strength agent, 0.005% of surfactant, 2.8% of hydration accelerator, 0.36% of retarder, 0.1% of complexing agent and the balance of water.
The crystallizing agent comprises sodium silicate and nano silica sol, and the weight ratio of the sodium silicate to the nano silica sol is 1:2.
the content of silicon dioxide in the nano silica sol is 30%, the particle size of the silicon dioxide is 10-15nm, and the silicon dioxide is purchased from Shandong Baite New Material Co., ltd, and the model is SS3015.
The wetting agent is polyethylene glycol with molecular weight of 600; the antifreezing agent is glycerol; the early strength agent is sodium formate and sodium acetate, and the weight ratio of the sodium formate to the sodium acetate is 1:7.5; the surfactant is sodium lignin sulfonate; the hydration accelerator comprises triethanolamine and diethanol monoisopropanolamine, and the addition amount of the diethanol monoisopropanolamine is 0.2wt% of the triethanolamine; the retarder is sodium gluconate and fumaric acid, and the adding amount of the fumaric acid is 2.4wt% of the sodium gluconate; the complexing agent is disodium ethylenediamine tetraacetate.
The preparation method of the water-based permeable crystallization waterproof agent comprises the following steps:
s1, adding a crystallizing agent into water, stirring for 20min at a rotating speed of 400r/min, heating to 60 ℃, preserving heat for 1h, and then cooling to room temperature to obtain a mixed solution A;
s2, adding a surfactant, a wetting agent, an antifreezing agent, a retarder and a complexing agent into the mixed solution A, and stirring at the rotating speed of 600r/min for 10min to obtain a mixed solution B;
s3, adding an early strength agent, a water reducing agent and a hydration accelerator into the mixed solution B, stirring for 12min at the rotating speed of 200r/min, standing for 2h, and discharging to obtain the water-based permeable crystallization waterproof agent.
Example 3
The water-based permeable crystallization waterproof agent comprises the following raw materials in percentage by weight: 0.5% of crystallization agent, 1.4% of wetting agent, 0.5% of antifreezing agent, 0.75% of early strength agent, 0.01% of surfactant, 3.2% of hydration accelerator, 0.45% of retarder, 0.02% of complexing agent and the balance of water.
The crystallizing agent comprises sodium silicate and nano silica sol, and the weight ratio of the sodium silicate to the nano silica sol is 1:2.
the content of silicon dioxide in the nano silica sol is 30%, the particle size of the silicon dioxide is 10-15nm, and the silicon dioxide is purchased from Shandong Baite New Material Co., ltd, and the model is SS3015.
The wetting agent is polyethylene glycol with molecular weight of 600; the antifreezing agent is glycerol; the early strength agent is sodium formate and sodium acetate, and the weight ratio of the sodium formate to the sodium acetate is 1:7.5; the surfactant is sodium lignin sulfonate; the hydration accelerator comprises triethanolamine and diethanol monoisopropanolamine, and the addition amount of the diethanol monoisopropanolamine is 0.3wt% of the triethanolamine; the retarder is sodium gluconate and fumaric acid, and the adding amount of the fumaric acid is 2.6wt% of the sodium gluconate; the complexing agent is disodium ethylenediamine tetraacetate.
The preparation method of the water-based permeable crystallization waterproof agent comprises the following steps:
s1, adding a crystallizing agent into water, stirring for 20min at a rotating speed of 600r/min, heating to 60 ℃, preserving heat for 2h, and then cooling to room temperature to obtain a mixed solution A;
s2, adding a surfactant, a wetting agent, an antifreezing agent, a retarder and a complexing agent into the mixed solution A, and stirring for 5min at the rotating speed of 800r/min to obtain a mixed solution B;
s3, adding an early strength agent, a water reducing agent and a hydration accelerator into the mixed solution B, stirring for 12min at the rotating speed of 300r/min, standing for 1h, and discharging to obtain the water-based permeable crystallization waterproof agent.
Example 4
The water-based permeable crystallization waterproof agent comprises the following raw materials in percentage by weight: 0.4% of crystallization agent, 1.1% of wetting agent, 0.4% of antifreezing agent, 0.55% of early strength agent, 0.006% of surfactant, 2.9% of hydration accelerator, 0.38% of retarder, 0.015% of complexing agent and the balance of water.
The crystallizing agent comprises sodium silicate and nano silica sol, and the weight ratio of the sodium silicate to the nano silica sol is 1:1.
the content of silicon dioxide in the nano silica sol is 30%, the particle size of the silicon dioxide is 10-15nm, and the silicon dioxide is purchased from Shandong Baite New Material Co., ltd, and the model is SS3015.
The wetting agent is polyethylene glycol with molecular weight of 600; the antifreezing agent is glycerol; the early strength agent is sodium formate and sodium acetate, and the weight ratio of the sodium formate to the sodium acetate is 1:4, a step of; the surfactant is sodium lignin sulfonate; the hydration accelerator comprises triethanolamine and diethanol monoisopropanolamine, and the addition amount of the diethanol monoisopropanolamine is 0.15wt% of the triethanolamine; the retarder is sodium gluconate and fumaric acid, and the adding amount of the fumaric acid is 2wt% of the sodium gluconate; the complexing agent is disodium ethylenediamine tetraacetate.
The preparation method of the water-based permeable crystallization waterproof agent comprises the following steps:
s1, adding a crystallizing agent into water, stirring for 15min at a rotating speed of 500r/min, heating to 55 ℃, preserving heat for 1.5h, and then cooling to room temperature to obtain a mixed solution A;
s2, adding a surfactant, a wetting agent, an antifreezing agent, a retarder and a complexing agent into the mixed solution A, and stirring at the rotating speed of 700r/min for 8min to obtain a mixed solution B;
s3, adding an early strength agent, a water reducing agent and a hydration accelerator into the mixed solution B, stirring for 10min at the rotating speed of 250r/min, standing for 1.5h, and discharging to obtain the water-based permeable crystallization waterproof agent.
Example 5
The water-based permeable crystallization waterproof agent comprises the following raw materials in percentage by weight: 0.4% of crystallization agent, 1.3% of wetting agent, 0.4% of antifreezing agent, 0.70% of early strength agent, 0.01% of surfactant, 3.2% of hydration accelerator, 0.43% of retarder, 0.02% of complexing agent and the balance of water.
The crystallizing agent comprises sodium silicate and nano silica sol, and the weight ratio of the sodium silicate to the nano silica sol is 1:3.
the content of silicon dioxide in the nano silica sol is 30%, the particle size of the silicon dioxide is 10-15nm, and the silicon dioxide is purchased from Shandong Baite New Material Co., ltd, and the model is SS3015.
The wetting agent is polyethylene glycol with molecular weight of 600; the antifreezing agent is glycerol; the early strength agent is sodium formate and sodium acetate, and the weight ratio of the sodium formate to the sodium acetate is 1:11; the surfactant is sodium lignin sulfonate; the hydration accelerator comprises triethanolamine and diethanol monoisopropanolamine, and the addition amount of the diethanol monoisopropanolamine is 0.4wt% of the triethanolamine; the retarder is sodium gluconate and fumaric acid, and the adding amount of the fumaric acid is 3wt% of the sodium gluconate; the complexing agent is disodium ethylenediamine tetraacetate.
The preparation method of the water-based permeable crystallization waterproof agent comprises the following steps:
s1, adding a crystallizing agent into water, stirring for 15min at a rotating speed of 500r/min, heating to 55 ℃, preserving heat for 1.5h, and then cooling to room temperature to obtain a mixed solution A;
s2, adding a surfactant, a wetting agent, an antifreezing agent, a retarder and a complexing agent into the mixed solution A, and stirring at the rotating speed of 700r/min for 8min to obtain a mixed solution B;
s3, adding an early strength agent, a water reducing agent and a hydration accelerator into the mixed solution B, stirring for 10min at the rotating speed of 250r/min, standing for 1.5h, and discharging to obtain the water-based permeable crystallization waterproof agent.
Example 6
The embodiment provides an aqueous penetrating crystallization waterproof agent and a preparation method thereof, and the specific implementation mode is the same as the embodiment 1, wherein the crystallization agent is sodium silicate.
Example 7
The embodiment provides an aqueous penetrating crystallization waterproof agent and a preparation method thereof, and the specific embodiment is the same as the embodiment 1, except that the hydration promoter is triethanolamine.
Comparative example 1
The comparative example provides an aqueous penetrating crystallization waterproofing agent and a preparation method thereof, and the specific embodiment is the same as example 1, except that no complexing agent is added to the raw materials.
Comparative example 2
The comparative example provides an aqueous penetrating crystallization waterproofing agent and a preparation method thereof, and the specific embodiment is the same as example 1, except that no surfactant is added to the raw materials.
Performance testing
The waterproofing agents prepared in examples 1 to 7 and comparative examples 1 to 2 were respectively prepared at 500g/m 2 The using amount of the paint is uniformly sprayed on the concrete structure plate surface after 8 hours are finished, dead angles cannot be left, curing is carried out for 12 hours after the spraying is finished, and the following performance tests are respectively carried out:
(1) The concrete structures obtained by spraying the waterproofing agents of examples 1 to 7 and comparative examples 1 to 2 were tested for compressive strength ratio (%), water absorption ratio (%), penetration height ratio (%), shrinkage ratio (%) according to JC/T474-2008 mortar, concrete waterproofing agent;
(2) The antifreeze performance of the waterproofing agents of examples 1 to 7 and comparative examples 1 to 2 was tested according to GB/T50082-2009 Standard for test method of Long-term Performance and durability of ordinary concrete;
the test results are shown in Table 1.
TABLE 1
As can be seen from the data of examples 1-5 in Table 1, the waterproof agent of the invention can be directly sprayed on the surface of the formed concrete to enable the formed concrete to have higher compressive strength in all ages, lower penetration height ratio, water absorption and 28d shrinkage ratio, and meanwhile, the loss rate of freeze thawing compressive strength is low, and the result shows that the waterproof agent can endow the concrete with excellent waterproof and impermeability, mechanical property, frost cracking resistance and good durability.
Compared with the example 1, the example 6 changes the type of the crystallization agent, the data show that the early strength of the concrete is not obviously affected, but the 28d compressive strength is obviously reduced, and meanwhile, the penetration height ratio, the water absorption rate, the 28d shrinkage ratio and the freeze thawing compressive strength loss rate are increased to a certain extent, which shows that the later mechanical strength, the waterproof impermeability and the freezing resistance of the concrete are adversely affected; example 7 changed the kind of the hydration accelerator compared to example 1, resulting in deterioration of the water repellency without substantially affecting other properties. Compared with the waterproofing agent in the example 1, the comparative example 1 is free from adding complexing agent, and the result shows that the waterproofing agent has no influence on the mechanical property and the frost cracking resistance of the concrete, but the waterproof impermeability is obviously deteriorated; the comparative example 2, in which no surfactant was added, had no effect on mechanical properties, but resulted in a slight deterioration in water repellency and a significant deterioration in freeze cracking resistance.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present invention.
Claims (10)
1. The water-based permeable crystallization waterproof agent is characterized by comprising the following raw materials in percentage by weight: 0.2 to 0.5 percent of crystallization agent, 1 to 1.4 percent of wetting agent, 0.3 to 0.5 percent of antifreezing agent, 0.49 to 0.75 percent of early strength agent, 0.005 to 0.01 percent of surfactant, 2.8 to 3.2 percent of hydration accelerator, 0.36 to 0.45 percent of retarder, 0.01 to 0.02 percent of complexing agent and the balance of water.
2. An aqueous penetrating crystallization water repellent according to claim 1, wherein the crystallization agent comprises sodium silicate and/or nano silica sol.
3. The aqueous crystalline waterproofing agent according to claim 1, wherein the wetting agent is polyethylene glycol having a molecular weight of 400-800.
4. The aqueous, osmotically crystalline waterproofing agent of claim 1 wherein the antifreeze is glycerol or ethylene glycol.
5. The aqueous penetrating crystallization waterproof agent according to claim 1, wherein the early strength agent is sodium formate and sodium acetate, and the weight ratio of the sodium formate to the sodium acetate is 1: (4-11).
6. An aqueous penetrating crystallization waterproofing agent according to claim 1 wherein the surfactant is sodium lignin sulfonate or calcium lignin sulfonate.
7. An aqueous penetration crystallization water repellent according to claim 1, wherein the hydration accelerator comprises triethanolamine and diethanol monoisopropanolamine, the diethanol monoisopropanolamine being added in an amount of 0.15-0.4wt% of the triethanolamine.
8. The aqueous penetrating crystallization waterproof agent according to claim 1, wherein the retarder is sodium gluconate and fumaric acid, and the amount of fumaric acid added is 2-3wt% of the sodium gluconate.
9. The aqueous crystalline waterproofing agent of claim 1, wherein the complexing agent is disodium edetate or dipotassium edetate.
10. A method for producing an aqueous penetrating crystallization waterproofing agent according to any one of claims 1 to 9, characterized by comprising the steps of:
s1, adding a crystallizing agent into water, stirring for 10-20min at the rotating speed of 400-600r/min, heating to 50-60 ℃, preserving heat for 1-2h, and then cooling to room temperature to obtain a mixed solution A;
s2, adding a surfactant, a wetting agent, an antifreezing agent, a retarder and a complexing agent into the mixed solution A, and stirring for 5-10min at the rotating speed of 600-800r/min to obtain a mixed solution B;
s3, adding an early strength agent, a water reducing agent and a hydration accelerator into the mixed solution B, stirring for 8-12min at the rotating speed of 200-300r/min, standing for 1-2h, and discharging to obtain the water-based permeable crystallization waterproof agent.
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