CN108675679B - Liquid curing agent for hardening and corrosion prevention of leak board and use method thereof - Google Patents
Liquid curing agent for hardening and corrosion prevention of leak board and use method thereof Download PDFInfo
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- CN108675679B CN108675679B CN201810622077.0A CN201810622077A CN108675679B CN 108675679 B CN108675679 B CN 108675679B CN 201810622077 A CN201810622077 A CN 201810622077A CN 108675679 B CN108675679 B CN 108675679B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- Aftertreatments Of Artificial And Natural Stones (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a liquid curing agent for hardening and corrosion prevention of a leak board and application thereofThe method solves the problems that the existing liquid curing agent for the leak board has poor corrosion resistance and a hardened layer is easy to damage. The curing agent comprises a component A, wherein the component A consists of an acidic buffer solution and a silica sol solution, and the mixing mass ratio of the acidic buffer solution to the silica sol solution is (14-25): (7-11). The using method of the invention comprises the following steps: firstly coating the component A on a concrete crack board, after the concrete crack board is completely dried, coating the component B, and maintaining for 2-3 days, wherein the environmental temperature is not lower than 5 ℃, the humidity is not higher than 70%, and the coating amounts of the component A and the component B are 0.6-1.3 kg/m2. The invention has simple components, can effectively increase the hardness of the leak board, has good seepage-proofing and antifouling performance, and enhances the chemical corrosion resistance, especially the acid resistance.
Description
Technical Field
The invention relates to a liquid curing agent and a using method thereof, in particular to a liquid curing agent for hardening and corrosion prevention of a leak board and a using method thereof.
Background
The leak boards of the breeding plants are generally cast iron leak boards, plastic net boards and the like, however, the leaks of the leak boards are right-angled with the edges of the front faces of the leak boards, so that the upper openings of the leaks are very sharp, breeding animals are easily injured, particularly hooves are easily injured, and the animals are infected. At present, cast-in-place concrete precast slabs are selected for the leak boards of the farm, and the leaks are arranged orderly, are easy to leak and do not hurt the feet or hooves of animals. Cast-in-place concrete precast slabs have been adopted by a large number of breeding plants as a crack plate.
There are also problems with using cast-in-place concrete panels: for pig raising plants, the feed for feeding pigs is acidic, so that the excrement is acidic, the feed is accumulated and the excrement is discharged untimely and is contacted with concrete for a long time, the concrete is inevitably corroded to a certain extent, the pig raising plants can be replaced regularly, huge manpower and material resources are consumed, and heavy people can cause collapse of piggeries, so that huge economic loss is caused.
In order to prolong the service life of the cast-in-place concrete crack plate, improve the hardness and increase the corrosion resistance of the cast-in-place concrete crack plate, the concrete crack plate needs to be hardened, although the common concrete curing agent can penetrate into the concrete to a certain depth at present and reacts with calcium and magnesium ions in the concrete to form harder calcium silicate hydrate, the pig feed is acidic and can react with the hydrate to cause the damage of a hardened layer, and potential safety hazards exist; on the other hand, most of the concrete hardeners in the market contain fluoride components, such as fluorosilicate, have certain biological toxicity problems, and are not suitable for serving as curing agents for concrete structures in breeding plants.
Disclosure of Invention
The invention aims to solve the technical problems and provides the liquid curing agent for the crack plate hardening and corrosion prevention, which has simple components, can effectively increase the hardness of the crack plate, has good seepage-proofing and antifouling performance, and enhances the chemical corrosion resistance, particularly the acid resistance.
The invention also provides a using method of the liquid curing agent.
The liquid curing agent for hardening and corrosion prevention of the leak board comprises a component A, wherein the component A consists of an acidic buffer solution and a silica sol solution, and the mixing mass ratio of the acidic buffer solution to the silica sol solution is (14-25): (7-11).
Preferably, in the component A, the mass concentration of the silica sol solution is 15-30%, and the particle size of the silica sol is 15-30 nm.
Preferably, in the component A, the acidic buffer is at least one selected from citrate buffer, phosphate buffer, acetate buffer and borate buffer.
Preferably, in the component A, the acidic buffer solution consists of a citrate buffer solution and a phosphate buffer solution.
Preferably, in the component A, the mass concentration of the citrate buffer solution is 2-6%, and the mass concentration of the phosphate buffer solution is 3-7%.
Preferably, in the component A, the mixing mass ratio of the citrate buffer solution to the phosphate buffer solution to the silica sol solution is (4-9): (10-16): (7-11).
Preferably, the water-reducing agent also comprises a component B, wherein the component B consists of a siloxane emulsion, a silicate solution and a water-reducing agent solution.
Preferably, the siloxane emulsion of the component B is isooctyltriethoxysilane emulsion with mass concentration of 20-50%; the silicate solution is a lithium silicate solution with the modulus of 3.6-5.0 and the mass concentration of 15-30%; the water reducing agent solution is a polycarboxylic acid solution with the mass concentration of 20-50%.
Preferably, the mass ratio of the isooctyltriethoxysilane emulsion, the lithium silicate solution and the polycarboxylic acid solution in the component B is (5-10): (10-16): (1-4).
In order to solve the problems in the background art, the inventor makes the following improvements:
(1) the acidic buffer solution which is not used in the field is introduced into the component A, the acidic buffer solution and the silica sol solution are mixed, and after the mixture is coated on the surface of a concrete crack board, the silica sol solution can react with calcium and magnesium ions in the concrete to form harder calcium silicate hydrate, the acidic buffer solution not only can further improve the depth of penetration into the concrete to form a thicker hardened layer, but also can prevent the calcium silicate hydrate from further reacting with acidic pig feed and excrement, so that the hardened layer is prevented from being damaged. The acidic buffer solution is at least one selected from citrate buffer solution, phosphate buffer solution, acetate buffer solution and borate buffer solution, preferably consists of citrate buffer solution and phosphate buffer solution, the citrate buffer solution has the functions of complexing calcium and magnesium ions in concrete and playing a certain anticorrosion role, the phosphate buffer solution has a better pH value of a maintenance system, and the free calcium and magnesium ions and silica sol can be better compounded to generate calcium silicate hydrate.
(2) On the basis of the component A, the component B is used, the two components are not used simultaneously, and the component A permeates the surface of the concrete crack plate to play roles of permeation and hardening, so that a bottom coating effect is formed; the component B is coated on the surface of the hardened concrete crack plate, and then permeates and reacts with the component A and the cement again, so that the surface performance of the concrete can be greatly improved, the self abrasion resistance ratio of the concrete is improved, the acid and alkali resistance is enhanced, the self-cleaning effect of the concrete is improved, and the service life of the plant crack plate is prolonged. Wherein the component B consists of siloxane emulsion, silicate solution and water reducing agent solution. The siloxane emulsion has the function of improving the self-cleaning function of the concrete, the isooctyl triethoxysilane emulsion is preferably selected, the silicate solution has the function of improving the abrasion resistance ratio of the concrete, the lithium silicate solution is preferably selected, the water reducing agent solution is a polycarboxylic acid water reducing agent, the polycarboxylic acid solution is preferably selected, the three are compounded to play a synergistic effect, the abrasion resistance of the concrete is improved, the acid and alkali resistance is improved, and the self-cleaning performance is achieved.
In the method of use of the present invention, A, B groups are not mixed and used separately: firstly coating the component A on the concrete crack plate, after the concrete crack plate is completely dried, coating the component B, and curing for 2-3 days, wherein the environmental temperature is not lower than 5 ℃ and the humidity is not higher than 70% during construction. Preferably, the coating amount of the component A and the coating amount of the component B are both 0.6-1.3 kg/m2Too high coating amount can cause waste of the medicament, increase subsequent cleaning load, and too low affects hardening performance, resulting in that the required hardness cannot be achieved.
The liquid curing agent has simple components, low cost and good permeability during coating, forms a thicker hardened layer on the surface layer of concrete, prevents further reaction of acid pig feed and excrement by the calcium silicate hydrate, avoids the damage of the hardened layer, can effectively increase the hardness of the crack plate, has strong seepage-proofing and antifouling performances, enhances the chemical corrosion resistance, particularly enhances the acid resistance, promotes the self-cleaning effect and prolongs the service life of the concrete crack plate of a farm.
Detailed Description
Example 1
A curing agent for hardening and corrosion prevention of a leak board comprises the following components in percentage by weight:
the component A contains citrate buffer solution with the mass concentration of 2%; phosphate buffer solution with the mass concentration of 3 percent; the silica sol has a particle size of 15-30 nm and a mass concentration of 15%.
The mass ratio of the component A, namely citrate buffer solution, phosphate buffer solution and silica sol is 4: 10: 7.
the component B contains isooctyl triethoxysilane emulsion with mass concentration of 20%; the lithium silicate solution has a modulus of 3.6-5.0 and a mass concentration of 15%; the mass concentration of the polycarboxylic acid solution is 20 percent;
the mass ratio of the component B, i-octyl triethoxysilane emulsion, the lithium silicate solution and the polycarboxylic acid solution is 5: 10: 1.
example 2
A curing agent for hardening and corrosion prevention of a leak board comprises the following components in percentage by weight:
the component A contains citrate buffer solution with the mass concentration of 4%; phosphate buffer solution with the mass concentration of 5 percent; the silica sol has a particle size of 15-30 nm and a mass concentration of 25%.
The mass ratio of the component A, namely citrate buffer solution, phosphate buffer solution and silica sol is 7: 13: 9.
the component B contains isooctyl triethoxysilane emulsion with mass concentration of 30%; the lithium silicate solution has a modulus of 3.6-5.0 and a mass concentration of 20%; the mass concentration of the polycarboxylic acid solution is 30 percent;
the mass ratio of the component B, i-octyl triethoxysilane emulsion, the lithium silicate solution and the polycarboxylic acid solution is 7: 13: 2.
when the sealing agent is used, the component A is firstly used on a leaking plate, the component B is used after the component A is dried, and the sealing agent is cured for 2-3 days after being dried.
Example 3
A curing agent for hardening and corrosion prevention of a leak board comprises the following components in percentage by weight:
the component A contains citrate buffer solution with the mass concentration of 6 percent; phosphate buffer solution with the mass concentration of 7 percent; the silica sol has a particle size of 15-30 nm and a mass concentration of 30%.
The mass ratio of the component A, namely citrate buffer solution, phosphate buffer solution and silica sol is 9: 16: 11.
the component B contains isooctyl triethoxysilane emulsion with mass concentration of 50%; the lithium silicate solution has a modulus of 3.6-5.0 and a mass concentration of 30%; the mass concentration of the polycarboxylic acid solution is 50 percent;
the mass ratio of the component B, i-octyl triethoxysilane emulsion, the lithium silicate solution and the polycarboxylic acid solution is 10: 16: 4.
example 4
A curing agent for hardening and corrosion prevention of a leak board comprises the following components in percentage by weight:
the component A contains citrate buffer solution with the mass concentration of 6 percent; phosphate buffer solution with the mass concentration of 7 percent; the silica sol has a particle size of 15-30 nm and a mass concentration of 30%.
The mass ratio of the component A, namely citrate buffer solution, phosphate buffer solution and silica sol is 6: 14: 6.
the component B contains octyl triethoxysilane emulsion with mass concentration of 50%; the modulus of the potassium silicate solution is 3.0-3.4, and the mass concentration is 35%; melamine solution with mass concentration of 45%;
the mass ratio of the component B, namely the octyl triethoxysilane emulsion, the potassium silicate solution and the melamine solution is 5: 13: 3.
Example 5
A curing agent for hardening and corrosion prevention of a leak board comprises the following components in percentage by weight:
the component A contains citrate buffer solution with the mass concentration of 6 percent; phosphate buffer solution with the mass concentration of 7 percent; the silica sol has a particle size of 15-30 nm and a mass concentration of 30%.
The mass ratio of the component A, namely citrate buffer solution, phosphate buffer solution and silica sol is 6: 14: 7.
the component B contains octyl triethoxysilane emulsion with mass concentration of 50%; the sodium silicate solution has a modulus of 3.0-3.4 and a mass concentration of 35%; 40% of sulfamate solution by mass concentration;
and the mass ratio of the component B, namely the octyl triethoxysilane emulsion, the sodium silicate solution and the sulfamic acid salt solution is 6: 11: 3.
Comparative example 1: the concrete sealing curing agent is prepared from a commercially available curing agent, wherein the main formula of the curing agent comprises 75-95% of silicate, 0.05-0.1% of dispersing agent, 0.05-0.15% of defoaming agent, 0.05-0.1% of stabilizing agent, 0.05-3% of accelerating agent and the balance of water, and the use method comprises the steps of coating the curing agent on a concrete crack plate for 2 times, namely completely drying for the first time, then coating for the second time, and curing for 2-3 days after drying, wherein the total coating amount is 1-2 kg/m2。
Comparative example 2:
the procedure of example 1 was repeated except that the citrate buffer and the phosphate buffer in the A fraction were replaced with acetate buffers.
When the concrete crack board is used, the component A is coated on the concrete crack board, the component B is coated after the concrete crack board is completely dried, the concrete crack board is maintained for 2-3 days, the environmental temperature is not lower than 5 ℃, the humidity is not higher than 70 percent during construction, and the coating amount of the component A and the coating amount of the component B are both 0.6-1.3 kg/m2。
After 30 days of use, the performance criteria were tested as in table 1 below.
Table 1 example 1 test performance index
Claims (7)
1. The liquid curing agent for the hardening and corrosion prevention of the leak board is characterized by comprising a component A, wherein the component A consists of an acid buffer solution and a silica sol solution, and the mixing mass ratio of the acid buffer solution to the silica sol solution is (14-25): (7-11), wherein the acidic buffer solution consists of a citrate buffer solution and a phosphate buffer solution;
the water-reducing agent also comprises a component B, wherein the component B consists of siloxane emulsion, silicate solution and water-reducing agent solution.
2. The liquid curing agent for the hardening and corrosion prevention of the leak board according to claim 1, wherein in the component A, the mass concentration of the silica sol solution is 15-30%, and the particle size of the silica sol is 15-30 nm.
3. The liquid curing agent for the hardening and corrosion prevention of the leak board according to claim 1, wherein in the component A, the mass concentration of a citrate buffer solution is 2-6%, and the mass concentration of a phosphate buffer solution is 3-7%.
4. The liquid curing agent for the hardening and corrosion prevention of the leak board according to claim 3, wherein in the component A, the mixing mass ratio of citrate buffer solution, phosphate buffer solution and silica sol solution is (4-9): (10-16): (7-11).
5. The liquid curing agent for the hardening and corrosion prevention of the leak board according to claim 1, wherein the siloxane emulsion of the component B is isooctyltriethoxysilane emulsion with a mass concentration of 20-50%; the silicate solution is a lithium silicate solution with the modulus of 3.6-5.0 and the mass concentration of 15-30%; the water reducing agent solution is a polycarboxylic acid solution with the mass concentration of 20-50%.
6. The liquid curing agent for the hardening and corrosion prevention of the leak board according to claim 5, wherein the weight ratio of the isooctyltriethoxysilane emulsion, the lithium silicate solution and the polycarboxylic acid solution in the component B is (5-10): (10-16): (1-4).
7. A use method of the liquid curing agent according to any one of claims 1 to 6, characterized in that the component A is coated on a concrete crack board, after the component A is completely dried, the component B is coated, and the concrete crack board is maintained for 2 to 3 days, wherein the environmental temperature is not lower than 5 ℃, the humidity is not higher than 70 percent, and the coating amount of the component A and the component B is 0.6 to 1.3kg/m2。
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1472161A (en) * | 2003-05-08 | 2004-02-04 | 同济大学 | Surface enhancing sealing agent for cement concrete |
| CN103964737A (en) * | 2014-04-25 | 2014-08-06 | 纳谷新材料(杭州)有限公司 | Nano-silicon-modified double-component wear-resistant penetration hardener and preparation method thereof |
| CN106007801A (en) * | 2016-05-30 | 2016-10-12 | 江苏名和集团有限公司 | Surface enhanced sealant for concrete and preparation method thereof |
| CN106699006A (en) * | 2017-01-20 | 2017-05-24 | 湖北省路桥集团有限公司 | Concrete sealing curing agent |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2879782A1 (en) * | 2012-08-02 | 2014-02-06 | Alzchem Ag | Liquid hardeners for hardening epoxide resins (ii) |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1472161A (en) * | 2003-05-08 | 2004-02-04 | 同济大学 | Surface enhancing sealing agent for cement concrete |
| CN103964737A (en) * | 2014-04-25 | 2014-08-06 | 纳谷新材料(杭州)有限公司 | Nano-silicon-modified double-component wear-resistant penetration hardener and preparation method thereof |
| CN106007801A (en) * | 2016-05-30 | 2016-10-12 | 江苏名和集团有限公司 | Surface enhanced sealant for concrete and preparation method thereof |
| CN106699006A (en) * | 2017-01-20 | 2017-05-24 | 湖北省路桥集团有限公司 | Concrete sealing curing agent |
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