CN115819066A - Structural waterproof and moistureproof material and preparation method thereof - Google Patents
Structural waterproof and moistureproof material and preparation method thereof Download PDFInfo
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- CN115819066A CN115819066A CN202210803269.8A CN202210803269A CN115819066A CN 115819066 A CN115819066 A CN 115819066A CN 202210803269 A CN202210803269 A CN 202210803269A CN 115819066 A CN115819066 A CN 115819066A
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- 239000000463 material Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000013543 active substance Substances 0.000 claims abstract description 13
- 239000004576 sand Substances 0.000 claims abstract description 13
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 13
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 13
- 239000000080 wetting agent Substances 0.000 claims abstract description 13
- 229920002678 cellulose Polymers 0.000 claims abstract description 9
- 239000001913 cellulose Substances 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 8
- 239000004816 latex Substances 0.000 claims abstract description 7
- 229920000126 latex Polymers 0.000 claims abstract description 7
- 239000003469 silicate cement Substances 0.000 claims abstract description 4
- 239000004568 cement Substances 0.000 claims abstract description 3
- 229920001661 Chitosan Polymers 0.000 claims description 38
- 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 17
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 15
- 229920002554 vinyl polymer Polymers 0.000 claims description 15
- 239000004115 Sodium Silicate Substances 0.000 claims description 14
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 14
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 14
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 13
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- 239000011398 Portland cement Substances 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 8
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 8
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 8
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 8
- 239000002738 chelating agent Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 229920001577 copolymer Polymers 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000002425 crystallisation Methods 0.000 claims description 6
- 230000008025 crystallization Effects 0.000 claims description 6
- BEGBSFPALGFMJI-UHFFFAOYSA-N ethene;sodium Chemical group [Na].C=C BEGBSFPALGFMJI-UHFFFAOYSA-N 0.000 claims description 6
- 239000011405 expansive cement Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 3
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 3
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 3
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 3
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 claims description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 2
- 239000001863 hydroxypropyl cellulose Substances 0.000 claims description 2
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 claims description 2
- 229920000609 methyl cellulose Polymers 0.000 claims description 2
- 239000001923 methylcellulose Substances 0.000 claims description 2
- 235000010981 methylcellulose Nutrition 0.000 claims description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 2
- 229920002126 Acrylic acid copolymer Polymers 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 20
- 230000035515 penetration Effects 0.000 abstract description 4
- 239000004566 building material Substances 0.000 abstract description 2
- 238000004078 waterproofing Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000004567 concrete Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 7
- 239000003973 paint Substances 0.000 description 7
- 239000011575 calcium Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 230000008595 infiltration Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000839 emulsion Substances 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- -1 1, 2-ethylene Chemical group 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 230000003204 osmotic effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000007903 penetration ability Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the field of building materials, and discloses a structural waterproof and moistureproof material and a preparation method thereof, aiming at solving the problems of poor waterproof performance and short effective waterproof time of waterproof materials in the prior art, wherein the structural waterproof and moistureproof material comprises the following components in parts by weight: 20 to 30 parts of silicate cement, 0 to 0.5 part of expansion cement, 65 to 70 parts of silica sand, 0.1 to 0.5 part of silica fume, 0.1 to 0.3 part of latex powder, 0.01 to 0.05 part of wetting agent, 0.1 to 0.3 part of cellulose and 0.02 to 0.5 part of active substance. The material has a good waterproof effect, has a deep penetration depth, can provide long-time effective waterproofing for a wall body, enables the wall body to have self-repairing capability, has a good combination effect with the wall body, is not easy to fall off, and can improve the mechanical property of the wall body.
Description
Technical Field
The invention relates to the field of building materials, in particular to a structural waterproof and moistureproof material and a preparation method thereof.
Background
In the concrete pouring process, the added mixing water often exceeds the water consumption required by the hydration curing reaction of the concrete, and the excessive mixing water flows in the wall as free water after the concrete is cured, so that capillary holes are formed in the internal structure of the concrete, the capillary holes can easily suck water into the wall through the capillary action, and the water content in the wall is increased. The basement is a room below the outdoor ground in the building, and the building land efficiency can be improved by building the basement. However, because the outer wall and the bottom plate of the basement directly contact with the soil, the water in the soil is easy to infiltrate and erode the outer wall and the bottom plate of the basement through the capillary structure in the wall, so that the indoor ground and the wall of the basement become moldy, the decorative layer of the wall falls off, and even the indoor water inflow is caused, which can influence the normal use of the basement and the service life of the whole building, and therefore, the waterproof requirement of the wall of the basement is far higher than that of the outer wall of the overground building.
At present, waterproof paint is generally used for improving the waterproof effect of a wall, wherein the organic paint has poor combination effect with the wall and is easy to age. For example, the publication No. CN103923563A of "high polymer modified organosilicon waterproof coating" disclosed in Chinese patent literature is composed of the following components, by weight, 10-15 kg of phenylate 1, 2-ethylene silicone rubber, 30-50 kg of deionized water, 15-25 kg of titanium dioxide, 10-20 kg of organosilicon monomer, 4-6 kg of defoamer, 4-6 kg of modifier, 4-6 kg of methyl silicone oil, 4-6 kg of resin emulsion, 4-6 kg of nano activated carbon and 40-60 kg of dimethyl siloxane. The paint is an organic paint, the main component of the paint is an elastic emulsion, the paint has poor adhesion to a wet wall surface, and when the osmotic pressure is high, a film is easy to bulge or generate cracks, so that the waterproof effect disappears, and the air permeability is poor.
Disclosure of Invention
The invention provides a structural waterproof and moistureproof material and a preparation method thereof, aiming at overcoming the problems of poor waterproof effect and short effective waterproof time of waterproof materials in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a structural waterproof and moistureproof material comprises the following components in parts by weight: 20 to 30 portions of Portland cement, 0 to 0.5 portion of expansive cement, 65 to 70 portions of silica sand, 0.1 to 0.5 portion of silica fume, 0.1 to 0.3 portion of emulsion powder, 0.01 to 0.05 portion of wetting agent, 0.1 to 0.3 portion of cellulose and 0.02 to 0.5 portion of active substance.
The active substance in the invention can permeate into the capillary structure in the concrete, when the capillary structure contains water, the active substance reacts with calcium in the concrete to generate crystals which can block the capillary structure, water molecules are prevented from passing through, the waterproof effect is good, the crystals can be continuously generated when the active substance meets the tide, the waterproof time is long, and the material can improve the mechanical property of the wall body.
Preferably, the latex powder is one or more of ethylene-vinyl acetate copolymer, vinyl acetate-versatic acid ethylene copolymer and acrylic acid copolymer.
Preferably, the cellulose is one or more of methylcellulose, hydroxyethyl cellulose, hydroxypropyl cellulose and hydroxypropyl methylcellulose.
The cellulose can improve the wetting effect of the material and also has a thickening effect.
Preferably, the active substance comprises a crystallizing agent and a chelating agent, and the mass ratio of the crystallizing agent to the chelating agent is (2-3): 1.
according to the invention, the crystallization agent and the chelating agent are selected for compounding, so that the penetration effect of the active substance is improved, and the waterproof effect and the self-healing capability are further improved.
Preferably, the crystallization agent comprises ethyl orthosilicate, sodium silicate and aluminum sulfate.
The ethyl orthosilicate and the sodium silicate can be mixed with Ca in the concrete wall 2+ And hydration product calcium hydroxide are combined to generate crystals, and the compactness and strength of concrete can be improved after the crystals block capillaries, wherein the infiltration speed of the tetraethoxysilane is higher, and the infiltration capacity of the sodium silicate is slightly weaker; the aluminum sulfate can promote the unhydrated part in the wall to hydrate, and further generate Ca 2+ And gels and ettringite, and therefore promote crystallization of ethyl orthosilicate and sodium silicate, in addition to crystallization of the sodium silicate itself. Therefore, when the three components are compounded, the waterproof effect is better.
Preferably, the mass ratio of the ethyl orthosilicate, the sodium silicate and the aluminum sulfate in the crystallizing agent is (4-8): (3-5): 1.
preferably, the chelating agent is EDTA modified chitosan.
The EDTA modified chitosan can reduce the surface tension of the material and improve the permeation effect, and the EDTA can act on Ca 2+ Has better complexing ability, can improve the hydration degree of concrete and has self-healing effect on the wall.
Preferably, the EDTA modified chitosan is prepared by the following steps:
(1) Dissolving chitosan in an acetic acid solution to obtain a chitosan solution, and adjusting the pH value of the chitosan solution to 4-6 by using acetic acid or sodium hydroxide;
(2) Adding sodium ethylene diamine tetracetate into the chitosan solution, wherein the mass ratio of the sodium ethylene diamine tetracetate to the chitosan in the chitosan solution is (1-3): 1, stirring and reacting for 2-4 h at normal temperature to obtain a reaction solution;
(3) And (3) drying the reaction solution at normal temperature in vacuum to obtain the EDTA modified chitosan.
A method for preparing a structural waterproof and moistureproof material comprises the following steps:
A. mixing and stirring the Portland cement, the expansive cement, the silica sand and the silica fume for 8-15 min;
B. and B, mixing the latex powder, the wetting agent, the cellulose and the active substance, adding the mixture obtained in the step A, and stirring for 10-20 min.
Therefore, the invention has the following beneficial effects: (1) The waterproof paint has good waterproof effect and deeper penetration depth, and can provide effective waterproof effect and self-repairing effect for a wall body for a long time; (2) The waterproof material has good combination effect with the wall body, is not easy to fall off, and can improve the mechanical property of the wall body.
Detailed Description
The invention is further described below with reference to specific embodiments.
The EDTA modified chitosan in the following implementation method is prepared by the following steps:
(1) Dissolving chitosan in an acetic acid solution with the mass fraction of 1% to obtain a chitosan solution, wherein the mass fraction of chitosan in the chitosan solution is 1%, and adjusting the pH value of the chitosan solution to 5 by using sodium hydroxide;
(2) Adding sodium ethylene diamine tetracetate into the chitosan solution, wherein the mass ratio of the sodium ethylene diamine tetracetate to the chitosan in the chitosan solution is 3:1, stirring and reacting for 4 hours at normal temperature to obtain a reaction solution;
(3) And (3) drying the reaction solution at normal temperature in vacuum to obtain the EDTA modified chitosan.
General examples
A structural waterproof and moistureproof material is prepared by the following steps:
A. adding the portland cement, the expansive cement, the silica sand and the silica fume into a stirring tank, and stirring for 10min at normal temperature;
B. mixing the latex powder, the wetting agent, the cellulose and the active substance, and then adding the mixture into a stirring tank to stir for 10min at normal temperature.
Example 1
A structural waterproof and moistureproof material comprises the following components in parts by weight: 26 parts of silicate cement, 68 parts of silica sand, 0.3 part of silica fume, 0.1 part of vinyl acetate-vinyl versatate copolymer, 0.01 part of wetting agent HY-352, 0.1 part of hydroxyethyl cellulose, 0.0375 part of ethyl orthosilicate, 0.03 part of sodium silicate, 0.0075 part of aluminum sulfate and 0.025 part of EDTA modified chitosan.
Example 2
A structural waterproof and moistureproof material comprises the following components in parts by weight: 26 parts of Portland cement, 0.5 part of expansive cement, 68 parts of silica sand, 0.3 part of silica fume, 0.1 part of acrylic copolymer, 0.01 part of wetting agent HY-352, 0.1 part of hydroxyethyl cellulose, 0.1875 part of ethyl orthosilicate, 0.15 part of sodium silicate, 0.0375 part of aluminum sulfate and 0.125 part of EDTA modified chitosan.
Example 3
A structural waterproof and moistureproof material comprises the following components in parts by weight: 30 parts of silicate cement, 65 parts of silica sand, 0.3 part of silica fume, 0.1 part of vinyl acetate-vinyl versatate copolymer, 0.01 part of wetting agent HY-352, 0.1 part of hydroxypropyl methyl cellulose, 0.0067 part of ethyl orthosilicate, 0.005 part of sodium silicate, 0.0017 part of aluminum sulfate and 0.0065 part of EDTA modified chitosan.
Comparative example 1
A structural waterproof and moistureproof material comprises the following components in parts by weight: 26 parts of Portland cement, 68 parts of silica sand, 0.3 part of silica fume, 0.1 part of vinyl acetate-vinyl versatate copolymer, 0.01 part of wetting agent HY-352, 0.1 part of hydroxyethyl cellulose, 0.075 part of ethyl orthosilicate and 0.025 part of EDTA modified chitosan.
Comparative example 2
A structural waterproof and moistureproof material comprises the following components in parts by weight: 26 parts of Portland cement, 68 parts of silica sand, 0.3 part of silica fume, 0.1 part of vinyl acetate-vinyl versatate copolymer, 0.01 part of wetting agent HY-352, 0.1 part of hydroxyethyl cellulose, 0.075 part of sodium silicate and 0.025 part of EDTA modified chitosan.
Comparative example 3
A structural waterproof and moistureproof material comprises the following components in parts by weight: 26 parts of Portland cement, 68 parts of silica sand, 0.3 part of silica fume, 0.1 part of vinyl acetate-vinyl versatate copolymer, 0.01 part of wetting agent HY-352, 0.1 part of hydroxyethyl cellulose, 0.075 part of aluminum sulfate and 0.025 part of EDTA modified chitosan.
Comparative example 4
A structural waterproof and moistureproof material comprises the following components in parts by weight: 26 parts of Portland cement, 68 parts of silica sand, 0.3 part of silica fume, 0.1 part of vinyl acetate-vinyl versatate copolymer, 0.01 part of wetting agent HY-352, 0.1 part of hydroxyethyl cellulose, 0.05 part of ethyl orthosilicate, 0.04 part of sodium silicate and 0.01 part of aluminum sulfate.
The materials obtained in the above examples and comparative examples were tested for mechanical properties and water resistance by the method described in GB 18445-2012 cement-based infiltration crystalline waterproof material, where the material of the test piece was C30 concrete, the infiltration depth was measured at the middle of the cut surface after the test piece was cut open, and the test results are shown in the following table.
As can be seen from the data of examples 1 to 3, the present invention has excellent water resistance, good bonding property with the substrate, and improved mechanical properties of the substrate.
Comparative examples 1-3 all had less water resistance than example 1, indicating that the compounding effect of ethyl orthosilicate, sodium silicate and aluminum sulfate was better than using a single component. While the comparative example 4, in which no EDTA was added to modify the chitosan, had a lower penetration depth and a lower osmotic pressure than those of examples 1 to 3, in which EDTA-modified chitosan was used, indicating that EDTA-modified chitosan can further enhance the penetration ability and crystallization effect of the active substance.
Claims (9)
1. A structural waterproof and moistureproof material is characterized by comprising the following components in parts by weight: 20 to 30 parts of silicate cement, 0 to 0.5 part of expansion cement, 65 to 70 parts of silica sand, 0.1 to 0.5 part of silica fume, 0.1 to 0.3 part of latex powder, 0.01 to 0.05 part of wetting agent, 0.1 to 0.3 part of cellulose and 0.02 to 0.5 part of active substance.
2. The structural waterproof and moistureproof material as claimed in claim 1, wherein the latex powder is one or more of ethylene-vinyl acetate copolymer, vinyl acetate-vinyl versatate copolymer and acrylic acid copolymer.
3. A structural waterproof and moisture-proof material as claimed in claim 1, wherein said cellulose is one or more of methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose and hydroxypropylmethyl cellulose.
4. A structural waterproof and moistureproof material as claimed in claim 1, wherein the active substance comprises a crystallizing agent and a chelating agent, and the mass ratio of the crystallizing agent to the chelating agent is (2 to 3): 1.
5. a structural waterproof and moisture resistant material as claimed in claim 4 wherein said crystallization agent comprises ethyl orthosilicate, sodium silicate and aluminum sulfate.
6. A structural waterproof and moistureproof material as claimed in claim 5, wherein the mass ratio of the ethyl orthosilicate, the sodium silicate and the aluminum sulfate in the crystallizing agent is (4 to 8): (3 to 5): 1.
7. a structural waterproof and moisture-proof material as claimed in claim 4, wherein said chelating agent is EDTA modified chitosan.
8. A structural waterproof and moisture-proof material as claimed in claim 7, wherein said EDTA modified chitosan is prepared by the following steps:
(1) Dissolving chitosan in an acetic acid solution to obtain a chitosan solution, and adjusting the pH of the chitosan solution to 4-6 by using acetic acid or sodium hydroxide;
(2) Adding sodium ethylene diamine tetracetate into the chitosan solution, wherein the mass ratio of the sodium ethylene diamine tetracetate to the chitosan in the chitosan solution is (1 to 3): 1, stirring and reacting for 2 to 4 hours at normal temperature to obtain a reaction solution;
(3) And (3) drying the reaction solution at normal temperature in vacuum to obtain the EDTA modified chitosan.
9. A method of making a structural waterproof and moisture resistant material as claimed in any one of claims 1 to 8, comprising the steps of:
A. mixing and stirring the Portland cement, the expansive cement, the silica sand and the silica fume for 8 to 15min;
B. and (4) mixing the latex powder, a wetting agent, cellulose and an active substance, and then adding the mixture obtained in the step A to the mixture, and stirring for 10-20min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210803269.8A CN115819066B (en) | 2022-07-07 | 2022-07-07 | Structural waterproof and moistureproof material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210803269.8A CN115819066B (en) | 2022-07-07 | 2022-07-07 | Structural waterproof and moistureproof material and preparation method thereof |
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| Publication Number | Publication Date |
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| CN115819066A true CN115819066A (en) | 2023-03-21 |
| CN115819066B CN115819066B (en) | 2024-03-19 |
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| CN115819066B (en) | 2024-03-19 |
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