CN103214265A - Method for preparing water-based penetration type concrete protective agent - Google Patents
Method for preparing water-based penetration type concrete protective agent Download PDFInfo
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- CN103214265A CN103214265A CN201310153443XA CN201310153443A CN103214265A CN 103214265 A CN103214265 A CN 103214265A CN 201310153443X A CN201310153443X A CN 201310153443XA CN 201310153443 A CN201310153443 A CN 201310153443A CN 103214265 A CN103214265 A CN 103214265A
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Abstract
The invention relates to a method for preparing a water-based penetration type concrete protective agent. The concrete protective agent is prepared from the following raw materials: aluminum potassium sulfate dodecahydrate, sodium hydroxide, citric acid, a silane coupling agent, a sodium silicate aqueous solution and deionized water. The method comprises the following operation steps of: adding the aluminum potassium sulfate dodecahydrate into the deionized water, and stirring; adding sodium hydroxide, and stirring; adding the citric acid, and stirring; sequentially adding the sodium silicate aqueous solution and the silane coupling agent, stirring, and obtaining a mixed solution; and standing to obtain the water-based penetration type concrete protective agent. The concrete protective agent penetrates into the concrete to react with the concrete so as to form a whole protective layer, the penetration of moisture, salt and the like on the concrete can be reduced to the greatest degree, and freeze thawing, carbonization, erosion, alkali-aggregate reaction, crack and other damages and corrosions are reduced; and the protective agent is good in waterproof effect, simple in construction process, long in product storage period and wide in application range.
Description
Technical field
The present invention relates to building material technical field, be specifically related to a kind of sand-cement slurry and cement concrete water proof protecting materials.
Background technology
Concrete structure durability problem has caused construction personnel and scientific research personnel's great attention.Under all-environment common influences such as extraneous illumination, temperature, rainwater, salt, oils, destructions such as freeze thawing, carbonization, erosion, alkali-aggregate reaction, crack easily take place in concrete.Under the unavoidable condition of external environment, should start with from the performance that improves concrete self.Find that by analysis often there is hole not of uniform size in concrete as a kind of composite porous after the sclerosis.With regard to deterioration process, concrete expansion is all relevant with water with cracking, water also is that corrosive medium (as villaumite, vitriol etc.) migration enters the carrier in the concrete simultaneously, and the existence of water medium and the migration in concrete pore and crack thereof become the principal element that influences concrete structure durability.Therefore, how to carry out concrete waterproof and become the key point that guarantees concrete durability.
The concrete works that waterproof requirement is arranged is normally set up one or more layers cover type water-proof material at concrete surface except that managing to improve the impermeability of himself.The latter has easy construction, and the significant advantage of waterproof effect is so at present a lot of concrete surface waterproof all adopts this method.Yet; it can only be protected concrete surface, and along with the aging or destruction of water-proof material, waterproof layer is prone to degradation problem under embrittlement and the cohesive strength; and then influence concrete protection effect, and the cover type waterproof is unfavorable in building surface construction in irregular shape.Therefore, radical solving method is by changing the impermeability that the pore fluid of concrete rate improves concrete self.What generally use at present is the permeable crystalline waterproofing material with multi-efficiencies such as waterproof, protection against corrosion, environmental protection, mainly is divided into two kinds of cementitious capillary waterproofing material and water base permeable crystalline waterproofing materials.Both compare, and water base permeable crystalline waterproofing material construction is simpler, constant product quality, and material property is not influenced by period of storage substantially.What is more important, the perviousness of water base osmosis type crystallization water-proof material is very good, and meeting water with the complicated and confused shape crystallisate that the reaction of inside concrete free alkali generates promptly can expand, make hole and microfracture in the concrete structure constantly obtain full closely knit, thereby improving the impervious ability of concrete structure, is a kind of concrete water-proof material with development prospect.Some trials and research have been carried out at present.For example, publication number is disclosed aqueous infiltrating crystallization type waterproof agent of Chinese invention patent Shen Qing Publication specification sheets of CN101619203 and preparation method thereof, publication number is disclosed water-borne permeable crystalline waterproofing material of Chinese invention patent Shen Qing Publication specification sheets of CN101671154 and preparation method thereof, but the material composition of above patent and proportioning and the present invention have a great difference, and its catalyzer does not all relate to the Potassium aluminum sulfate dodecahydrate composition.
Summary of the invention
For the impermeability that effectively improves concrete self and performance such as corrosion-resistant, thereby prolong work-ing life of concrete structure, the invention provides a kind of water base permeable concrete protective material.
Concrete technical solution of the present invention is as follows:
A kind of water base permeable concrete protective material is made by following raw materials by weight percentage: Potassium aluminum sulfate dodecahydrate 0.4%～0.8%, sodium hydroxide 2%～6%, citric acid 0.015%～0.035%, silane coupling agent 2%～6%, sodium silicate aqueous solution 22%～28%, deionized water 59.17 %～74.59%;
Concrete preparation manipulation step is as follows: under the agitation condition of rotating speed 100r/min, Potassium aluminum sulfate dodecahydrate is added in the deionized water, stir 10min; Add sodium hydroxide again, stir 15min; Under rotating speed 200 r/min conditions, add citric acid, stir 15min; Under rotating speed 50r/min condition, add sodium silicate aqueous solution, silane coupling agent successively, stir 20min, obtain mixing solutions; Left standstill 2 hours, and obtained water base permeable concrete protective material.
Described citric acid is meant Citric Acid, usp, Anhydrous Powder.
Described silane coupling agent is meant the isobutyl-triethoxyl silane.
Described sodium silicate aqueous solution is the sodium silicate aqueous solution of degree Beaume 40～42.
Described deionized water is meant the deionized water of resistivity more than or equal to 10 megaohms centimetre.
The protectant using method of water base permeable concrete is as follows: the surface of at first cleaning concrete surface or sand-cement slurry, make the surface of concrete surface or sand-cement slurry not have open fire, adopt then cylinder brush or low-pressure sprayer with the brushing of water base permeable concrete protective material or be sprayed on the surface of concrete surface or sand-cement slurry; Brushing or spraying consumption are 0.2～0.3kg/m
2, brushing or spraying at twice, 10～24 hours timed intervals between twice brushing or the spraying.
Concrete is by gelatinous material, gather materials, water and add admixture in case of necessity, the rigid material that evenly stirring of warp, closely knit moulding, maintenance sclerosis form, but be a kind of non-homogeneous porous material in essence, under the erosion of media such as water, carbonic acid gas, chlorion, vitriol, unavoidably be subjected to the influence of foeign element and the destruction of accelerate concrete has been shortened work-ing life greatly.Therefore, should take certain means to reduce the existence of concrete pore, enter concrete approach thereby reduce corrosive medium.Water base permeable concrete protective material of the present invention is sprayed at concrete surface can effective airtight concrete pore and microfracture; improve concrete impermeability; simultaneously can the enhanced coagulation soil structure, have tangible water-tight corrosion-proof function, can significantly improve concrete weather resistance.
Useful technique effect of the present invention embodies in the following areas:
(1) compares with normal concrete, the present invention reacts formation globality protective layer with it by being penetrated into inside concrete, moisture, salt etc. be can reduce to greatest extent to concrete infiltration, destruction and corrosion such as freeze thawing, carbonization, erosion, alkali-aggregate reaction, crack helped to reduce;
(2) compare with conventional thin membrane type water-proof material, the present invention is sprayed at behind the concrete not film forming, if on tectum is arranged, can not influence interlaminar bonding power.In addition, the present invention is depth of penetration directly, and the complicated and confused shape crystallisate water-swelling with the reaction of inside concrete free alkali generates combines together thereby fill air free concrete capillary-size pore and microfracture and concrete, and waterproof, protection unite two into one.And construction technology is simple, and water-based (solvent-free) is nontoxic, to human body, environmentally friendly, pollution-free, belongs to green material;
(3) compare with cementitious capillary waterproofing material, the present invention need not dilute, and can directly be sprayed at the concrete surface of different shape, good water-proof effect, and construction technology is simple, and product is long storage period, and use range is wider;
(4) compare with other water base osmosis type crystallization water-proof materials, perviousness of the present invention is stronger, the function of the airtight concrete pore of easier performance, water-tight corrosion-proof better effects if;
(5) water base permeable concrete protective material of the present invention is applicable to all kinds of sand-cement slurry or concrete structure, as: 1. the waterproof on people's air defense, the underground space, wall ground, toilet; 2. tunnel, bridge floor, bridge pier and waterproof, the protection against corrosion of exposing concrete structures in physical environment; 3. antiseepages, anticorrosion such as water factory pond, treatment tank; 4. the wall in grain, medicine, tobacco leaf warehouse and damp proofing of ground etc.
Embodiment
Below in conjunction with embodiment, the present invention is further described.
Embodiment 1
Water base permeable concrete protective material is made by following raw materials by weight percentage:
Potassium aluminum sulfate dodecahydrate 0.4%, sodium hydroxide 2%, citric acid (Citric Acid, usp, Anhydrous Powder) 0.015%, silane coupling agent isobutyl-triethoxyl silane 2%, sodium silicate aqueous solution (degree Beaume 40～42) 22%, deionized water (resistivity more than or equal to 10 megaohms centimetre) 73.585%.
Concrete preparation manipulation step is as follows: under the agitation condition of rotating speed 100r/min, Potassium aluminum sulfate dodecahydrate is added in the deionized water, stir 10min; Add sodium hydroxide again, stir 15min; Under rotating speed 200 r/min conditions, add citric acid, stir 15min; Under rotating speed 50r/min condition, add sodium silicate aqueous solution, silane coupling agent successively, stir 20min, obtain mixing solutions; Left standstill 2 hours, and obtained water base permeable concrete protective material.
Concrete sample surface spraying consumption: 0.2kg/m
2
Embodiment 2
Water base permeable concrete protective material, its component and mass percent are:
Potassium aluminum sulfate dodecahydrate 0.4%, sodium hydroxide 2%, citric acid (Citric Acid, usp, Anhydrous Powder) 0.015%, silane coupling agent isobutyl-triethoxyl silane 2%, sodium silicate aqueous solution (degree Beaume 40～42) 22%, deionized water (resistivity more than or equal to 10 megaohms centimetre) 73.585%.
The preparation method is with embodiment 1.
Concrete sample surface spraying consumption: 0.3kg/m
2
Embodiment 3
Water base permeable concrete protective material, its component and mass percent are:
Potassium aluminum sulfate dodecahydrate 0.6%, sodium hydroxide 4%, citric acid (Citric Acid, usp, Anhydrous Powder) 0.025%, silane coupling agent isobutyl-triethoxyl silane 4%, sodium silicate aqueous solution (degree Beaume 40～42) 25%, deionized water (resistivity more than or equal to 10 megaohms centimetre) 66.375%.
The preparation method is with embodiment 1.
Concrete sample surface spraying consumption: 0.2kg/m
2
Embodiment 4
Water base permeable concrete protective material, its component and mass percent are:
Potassium aluminum sulfate dodecahydrate 0.6%, sodium hydroxide 4%, citric acid (Citric Acid, usp, Anhydrous Powder) 0.025%, silane coupling agent isobutyl-triethoxyl silane 4%, sodium silicate aqueous solution (degree Beaume 40～42) 25%, deionized water (resistivity more than or equal to 10 megaohms centimetre) 66.375%.
The preparation method is with embodiment 1.
Concrete sample surface spraying consumption: 0.3kg/m
2
Embodiment 5
Water base permeable concrete protective material, its component and mass percent are:
Potassium aluminum sulfate dodecahydrate 0.8%, sodium hydroxide 6%, citric acid (Citric Acid, usp, Anhydrous Powder) 0.035%, silane coupling agent isobutyl-triethoxyl silane 6%, sodium silicate aqueous solution (degree Beaume 40～42) 28%, deionized water (resistivity more than or equal to 10 megaohms centimetre) 59.165%.
The preparation method is with embodiment 1.
Concrete sample surface spraying consumption: 0.2kg/m
2
Embodiment 6
Water base permeable concrete protective material, its component and mass percent are:
Potassium aluminum sulfate dodecahydrate 0.8%, sodium hydroxide 6%, citric acid (Citric Acid, usp, Anhydrous Powder) 0.035%, silane coupling agent isobutyl-triethoxyl silane 6%, sodium silicate aqueous solution (degree Beaume 40～42) 28%, deionized water (resistivity more than or equal to 10 megaohms centimetre) 59.165%.
The preparation method is with embodiment 1.
Concrete sample surface spraying consumption: 0.3kg/m
2
The control experiment situation is as follows:
The preparation of cement concrete test specimen sees Table 1, needs under standard conditions maintenance to 28 day after the concrete sample moulding.
The preparation of table 1 concrete sample
The protectant using method of water base permeable concrete is as follows:
At first clean the surface of concrete surface or sand-cement slurry, make the surface of concrete surface or sand-cement slurry not have open fire, adopt then cylinder brush or low-pressure sprayer with the brushing of water base permeable concrete protective material or be sprayed on the surface of concrete surface or sand-cement slurry; Brushing or spraying consumption are 0.2～0.3kg/m
2, brushing or spraying at twice, 10～24 hours timed intervals between twice brushing or the spraying.
To using the protectant 6 kinds of test specimens of above 6 embodiment respectively and not using protectant test specimen, according to " Standard for test methods of longterm performance and durability of ordinary concrete " (GBJ82-1985) the 5th chapter carry out concrete impermeability test.When the seepage water pressure of test specimen reached 1.20MPa, constant voltage 8h unloaded test specimen, behind the broken type, evenly got 10 points on the base, measured concrete infiltration height with Straight Steel Ruler.
In order to detect the antiseptic property that uses the protectant 6 kinds of test specimens of above 6 embodiment respectively and do not use protectant test specimen; with reference to DBJ01-54-2001 " contacting permeation type waterproof paint inspection of quality evaluation criteria " technological standard; concrete sample is soaked 168h test its alkali resistance in saturated aqua calcis, test specimen is soaked 168h test its acid resistance in 1% concentration hydrochloric acid soln.
Use the protectant 6 kinds of test specimens of above 6 embodiment respectively and do not use the impervious of protectant test specimen and antiseptic property detected result as shown in table 2.
The concrete impervious corrosion-resistanting test of table 2 detects data
Detect data as can be seen from above-mentioned test; be coated with the protectant concrete of water base permeable concrete and improved impermeability greatly; infiltrate and highly be reduced to 20～32 ㎜; and improved the ability of the anti-acid and alkali corrosion of concrete; concrete there is good provide protection, can obviously improves durability of concrete.
Claims (6)
1. the protectant preparation method of water base permeable concrete is characterized in that: made by following raw materials by weight percentage: Potassium aluminum sulfate dodecahydrate 0.4%～0.8%, sodium hydroxide 2%～6%, citric acid 0.015%～0.035%, silane coupling agent 2%～6%, sodium silicate aqueous solution 22%～28%, deionized water 59.17 %～74.59%;
Concrete preparation manipulation step is as follows: under the agitation condition of rotating speed 100r/min, Potassium aluminum sulfate dodecahydrate is added in the deionized water, stir 10min; Add sodium hydroxide again, stir 15min; Under rotating speed 200 r/min conditions, add citric acid, stir 15min; Under rotating speed 50r/min condition, add sodium silicate aqueous solution, silane coupling agent successively, stir 20min, obtain mixing solutions; Left standstill 2 hours, and obtained water base permeable concrete protective material.
2. the protectant preparation method of a kind of water base permeable concrete according to claim 1, it is characterized in that: described citric acid is meant Citric Acid, usp, Anhydrous Powder.
3. the protectant preparation method of a kind of water base permeable concrete according to claim 1, it is characterized in that: described silane coupling agent is meant the isobutyl-triethoxyl silane.
4. the protectant preparation method of a kind of water base permeable concrete according to claim 1, it is characterized in that: described sodium silicate aqueous solution is the sodium silicate aqueous solution of degree Beaume 40～42.
5. the protectant preparation method of a kind of water base permeable concrete according to claim 1 is characterized in that: described deionized water is meant the deionized water of resistivity more than or equal to 10 megaohms centimetre.
6. the protectant preparation method of a kind of water base permeable concrete according to claim 1, it is characterized in that: the protectant using method of water base permeable concrete is as follows: the surface of at first cleaning concrete surface or sand-cement slurry, make the surface of concrete surface or sand-cement slurry not have open fire, adopt then cylinder brush or low-pressure sprayer with the brushing of water base permeable concrete protective material or be sprayed on the surface of concrete surface or sand-cement slurry; Brushing or spraying consumption are 0.2～0.3kg/m
2, brushing or spraying at twice, 10～24 hours timed intervals between twice brushing or the spraying.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103848643A (en) * | 2014-01-28 | 2014-06-11 | 中国水利水电第三工程局有限公司 | Concrete anti-cracking curing agent and preparation method thereof |
| CN104459039A (en) * | 2014-11-26 | 2015-03-25 | 国家电网公司 | Performance test method for penetration protection material |
| CN104844143A (en) * | 2015-05-04 | 2015-08-19 | 中国建筑股份有限公司 | Spray type hydrophilic inorganic gel water-proofing agent and preparation method thereof |
| CN104964915A (en) * | 2015-06-24 | 2015-10-07 | 廖引家 | Method for testing acid-corrosion resistance of road concrete |
| CN105218154A (en) * | 2015-09-16 | 2016-01-06 | 桂林市和鑫防水装饰材料有限公司 | A kind of Thief zone water-resisting agent |
| CN105236921A (en) * | 2015-09-16 | 2016-01-13 | 桂林市和鑫防水装饰材料有限公司 | Novel high-penetration waterproofing agent |
| CN105347845A (en) * | 2015-11-03 | 2016-02-24 | 济南大学 | Concrete surface permeable coating |
| CN108516727A (en) * | 2018-04-24 | 2018-09-11 | 高传位 | A kind of ultra-high performance concrete waterproof complex liquid and preparation method thereof |
| CN109053014A (en) * | 2018-10-18 | 2018-12-21 | 洛阳理工学院 | A kind of dedicated enhancing water-proofing agent of gypsum |
| CN113264781A (en) * | 2021-06-10 | 2021-08-17 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | High-durability carved mark on concrete surface and construction method |
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| CN101386508A (en) * | 2008-10-24 | 2009-03-18 | 王可良 | Formula of concrete creak self-repair material and preparation technology |
| CN102557727A (en) * | 2011-12-30 | 2012-07-11 | 颜正荣 | Building cement-based penetration hardening material and preparation method thereof |
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| CN101386508A (en) * | 2008-10-24 | 2009-03-18 | 王可良 | Formula of concrete creak self-repair material and preparation technology |
| CN102557727A (en) * | 2011-12-30 | 2012-07-11 | 颜正荣 | Building cement-based penetration hardening material and preparation method thereof |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103848643A (en) * | 2014-01-28 | 2014-06-11 | 中国水利水电第三工程局有限公司 | Concrete anti-cracking curing agent and preparation method thereof |
| CN104459039A (en) * | 2014-11-26 | 2015-03-25 | 国家电网公司 | Performance test method for penetration protection material |
| CN104844143B (en) * | 2015-05-04 | 2017-03-29 | 中国建筑股份有限公司 | A kind of spray-type aqueous inorganic gel waterproofing agent and preparation method thereof |
| CN104844143A (en) * | 2015-05-04 | 2015-08-19 | 中国建筑股份有限公司 | Spray type hydrophilic inorganic gel water-proofing agent and preparation method thereof |
| CN104964915A (en) * | 2015-06-24 | 2015-10-07 | 廖引家 | Method for testing acid-corrosion resistance of road concrete |
| CN105218154A (en) * | 2015-09-16 | 2016-01-06 | 桂林市和鑫防水装饰材料有限公司 | A kind of Thief zone water-resisting agent |
| CN105236921A (en) * | 2015-09-16 | 2016-01-13 | 桂林市和鑫防水装饰材料有限公司 | Novel high-penetration waterproofing agent |
| CN105347845A (en) * | 2015-11-03 | 2016-02-24 | 济南大学 | Concrete surface permeable coating |
| CN108516727A (en) * | 2018-04-24 | 2018-09-11 | 高传位 | A kind of ultra-high performance concrete waterproof complex liquid and preparation method thereof |
| CN108516727B (en) * | 2018-04-24 | 2021-01-01 | 高传位 | Ultra-high performance concrete waterproof composite liquid and preparation method thereof |
| CN109053014A (en) * | 2018-10-18 | 2018-12-21 | 洛阳理工学院 | A kind of dedicated enhancing water-proofing agent of gypsum |
| CN109053014B (en) * | 2018-10-18 | 2020-12-08 | 洛阳理工学院 | Enhanced water-resistant agent special for gypsum |
| CN113264781A (en) * | 2021-06-10 | 2021-08-17 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | High-durability carved mark on concrete surface and construction method |
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