CN100560665C - Sulfate-resisting composite concrete paint - Google Patents
Sulfate-resisting composite concrete paint Download PDFInfo
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- CN100560665C CN100560665C CNB2005100250402A CN200510025040A CN100560665C CN 100560665 C CN100560665 C CN 100560665C CN B2005100250402 A CNB2005100250402 A CN B2005100250402A CN 200510025040 A CN200510025040 A CN 200510025040A CN 100560665 C CN100560665 C CN 100560665C
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Abstract
A kind of outside in type concrete surface brushing supercoat, improving the security of concrete structure and the sulfate-resisting composite concrete paint of weather resistance is made up of following component (weight part): A component: 100 parts of BASF AG's benzene emulsions, 0.5 part of NOPCO company promoting agent polydimethylsiloxane, aerosil; B component: 42.570～90 parts of sulphate-resistant cements, SIO
210～30 parts, CaCO
310～30 parts, 10 parts of talcum powder, 10 parts of wollastonite powders, 0.1 part of calcium lignin sulphonate.The coating that forms by this composite coating of method provided by the invention preparation and construction has good sulfate resistance performance, be characterized in sulfate medium, having good mechanical property retention rate, soak weight rate through nearly 1056 hours and be no more than 5%, appearance of coat is good, material source is convenient, and environmental protection and workability are good.
Description
Technical field
Building coating involved in the present invention; be a kind of outside in type concrete surface brushing supercoat; stop extraneous sulfur acid salts solution to be penetrated into inside concrete and hydrated cementitious product generation chemical reaction, improve the security of concrete structure and the sulfate-resisting composite concrete paint of weather resistance.
Background technology
China is concrete production and uses big country that according to statistics in 2003, continent concrete production total amount reached 12 billion cubic meters, accounts for 40% of world's total amount.The concrete that is called artificial stone has different chemistry and mineral composition with lithotome, thereby is more vulnerable to the corrosion of external environment, and is international and domestic, because corrosion causes concrete destruction, causes catastrophic accident and heavy economic losses accident common occurrence.
Corrosion is material and external environment generation physics, chemical reaction, and recurring structure changes and the generation of novel substance, and causes material property decline or completely lose the process of use value.For cement concrete, the corrosion in physical environment is from aspect several: corrosive gases and aerosol; Corrosive water comprises to be produced and domestic water; Acid, alkali, salts solution and polluted ground.
For the content of vitriol in sulfate liquor and the soil following provisions are made in concrete erosion by international ACI (ACI) rules that extensively adopt:
Negligible erosion: sulphate content 0.1% in the soil, is lower than 150 * 10 in the aqueous solution
-6Mg/L; Medium erosion: sulphate content 0.1～0.2% in the soil, is lower than 150～1500 * 10 in the aqueous solution
-6Mg/L; The serious erosion: sulphate content 0.2～2% in the soil, is lower than 1500～10000 * 10 in the aqueous solution
-6Mg/L, very seriously corrode: sulphate content 22% in the soil, surpasses 10000 * 10 in the aqueous solution
-6Mg/L.
Saline soil is widely distributed in China, and the province is concentrated for saline soil in the Qinghai of the Northwest, Xinjiang, Inner Mongol, Gansu, Ningxia etc., and also there is the scattered distribution of saline soil the Northeast, the Huanghe valley, the Yangtze valley.According to the statement of the Northwest's geologic report, the west area is based on vitriol and villaumite, and its content surpasses the ACI defined and seriously corrodes content, to the very big threat of formation of concrete durability and security.
Vitriol is as follows to concrete erosion mechanism, and the cement inorganic coagulation material in the concrete is by hydration reaction, the C3A of generation, Ca (OH)
2Very easily with vitriol generation chemical reaction, generate the swelling property material, its chemical reaction is as follows:
Na
2SO
4 ·10H
2O+Ca(OH)
2→CaSO
4 ·2H
2O+NaOH+8H
2O
3CaSO
4 ·2H
2O+3CaO
·Al
2O
3.19H
2O→
3CaO
·Al
2O
3.3CaSO
4 ·31H
2O+Ca(OH)
2
The ettringite volumetric expansion that reaction is generated is to 2.27 times of original volume, and the gypsum volume that is generated also increased by 1.24 times more originally.Above-mentioned mineral are present in the framework of concrete material, produce the swelling pressure, this pressure surpasses concrete cohesive strength, will make concrete surface cracking and softening, the crack causes extraneous sulfate liquor further to inside concrete infiltration, the damage of accelerate concrete.At many scholars' the initial stage in sulphate attack of experiment showed,, xln enriches in pore fluid of concrete, has increased degree of compactness, and early stage intensity can increase to some extent, but its net result is that intensity is constantly descended, and finally causes destroying.Destroy for Steel Concrete vitriol, the reinforcing bar that makes inside concrete is lost protection barrier, Cl
-, H
2O, O
2Arrive at rebar surface rapidly, carry out electrochemical reaction, cause reinforcing bar to corrode fast.
In order to address the above problem, the method that present concrete sulfate resistance is taked mainly contains:
1. improve the density soil of self, improve concrete impermeability and weather resistance.
2. take outer protection method.At the outer supercoat of in type concrete surface brushing sulfate resistance, avoid extraneous vitriol to permeate in inside concrete.
Taking outer protection method is a kind of method relatively more commonly used, but more existing coating effects are all not ideal enough at present, need a kind of respond well, at the sulfate resistance concrete composite coating of in type concrete surface brushing to avoid and to reduce of the threat of extraneous vitriol to concrete durability and security.
Summary of the invention
The purpose of this invention is to provide a kind of outside in type concrete surface brushing supercoat; avoid extraneous vitriol to permeate sulfate resistance concrete composite coating in inside concrete; to solve the above-mentioned problems in the prior art; the coating that forms with this sulfate resistance concrete composite coating of the present invention should have good sulfate resistance performance; be characterized in sulfate medium, having good mechanical property retention rate; soak weight rate through nearly 1056 hours and be no more than 5%; appearance of coat is good; material source is convenient, and environmental protection and workability are good.
Another object of the present invention provides a kind of preparation method of above-mentioned sulfate resistance concrete composite coating.
The contriver works out a kind of organic and inorganic gelling material composite coating, not solvent-laden sulfate-resisting composite concrete paint finally through test of many times.
Sulfate-resisting composite concrete paint of the present invention is made up of following component (weight part):
The A component:
100 parts of BASF AG's benzene emulsions
0.5 part of NOPCO company promoting agent polydimethylsiloxane, aerosil
The B component:
42.5 70～90 parts of sulphate-resistant cements
SIO
210～30 parts
CaCO
310～30 parts
10 parts of talcum powder
10 parts of wollastonite powders
0.1 part of calcium lignin sulphonate
Sulfate-resisting composite concrete paint of the present invention, its best composition (weight part) consists of:
The A component:
100 parts of BASF AG's benzene emulsions
0.5 part of NOPCO company promoting agent polydimethylsiloxane, aerosil
The B component:
42.5 80 parts of sulphate-resistant cements
SIO
220 parts in 200 orders
CaCO
310 parts in 500 orders
10 parts in talcum powder 1250 orders
10 parts in wollastonite powder 800 orders
0.1 part of calcium lignin sulphonate
Prepare of the present invention a kind of outside in type concrete surface brushing supercoat; avoid extraneous vitriol to permeate in the method for the sulfate-resisting composite concrete paint of inside concrete; it is characterized in that this sulfate resistance concrete composite coating is divided into A, B two components; process the storage time spent respectively and now join, this method comprises by following steps to be formed:
(a) A component: 0.5 part of 100 parts+NOPCO of BASF AG's benzene emulsion company promoting agent polydimethylsiloxane, aerosil, high-speed stirring mixes, weighing and bagging;
(b) B component: 42.5 70～90 parts of sulphate-resistant cements, SIO
220～30 parts, CaCO
320～30 parts, 10 parts of talcum powder, 10 parts of wollastonite powders, 0.1 part of thorough mixing in the twin screw dry powder blender of calcium lignin sulphonate sieve weighing and bagging;
When (c) construction is used; in A: B=1: 1.2 ratios; weigh up A, B component; open and stir rifle; rotating speed reaches 500～600r/min, and the B material is slowly added among the A, mixes until A, B component; become the rubber cement shape be of the present invention outside in type concrete surface brushing supercoat, avoid extraneous vitriol to permeate sulfate-resisting composite concrete paint in inside concrete.
When construction is used, by A: B=1: 1.2 ratios, at no oil stain, do not have loosen, no open fire concrete surface, employing is rolled, the brush mode is constructed; Usually coating can reach 1.2mm thickness after 2～3 brushings, twice brushing interval, before looking-be coated with surface drying (5～6 hours) to get final product; Temperature is lower than 5 ℃ and can not constructs.
The formed coating of evidence sulfate-resisting composite concrete paint has fine sulfate resistance performance, be characterized in sulfate medium, having good mechanical property retention rate, soak weight rate through nearly 1056 hours and be no more than 5%, appearance of coat is good, material source is convenient, and environmental protection and workability are good.
Embodiment
Further specify the present invention below by embodiment and comparative experimental example.
Embodiment 1.
At normal temperatures and pressures, process A, B two components respectively, carry out according to the following steps:
The A component: the benzene emulsion 100Kg of BASF AG adds NOPCO company promoting agent polydimethylsiloxane, aerosil 0.5Kg, and high-speed stirring mixes, and weighing and bagging is stand-by;
B component: sulphate-resistant cement 42.5 80Kg, SIO
2200 order 20Kg, CaCO
3500 order 10Kg, talcum powder 1250 order 10Kg, wollastonite powder 800 order 10Kg, calcium lignin sulphonate 0.1Kg thorough mixing in the twin screw dry powder blender sieve, and weighing and bagging is stand-by;
In A: B=1: 1.2 ratios; weigh up A, B component; open and stir rifle; rotating speed reaches 500～600r/min; slowly add the B material among the A; mix until A, B component, become the rubber cement shape be of the present invention outside in type concrete surface brushing supercoat, avoid extraneous vitriol to permeate sulfate-resisting composite concrete paint in inside concrete.
Embodiment 2.
At normal temperatures and pressures, process A, B two components respectively, carry out according to the following steps:
The A component: the benzene emulsion 100Kg of BASF AG adds NOPCO company promoting agent polydimethylsiloxane, aerosil 0.5Kg, and high-speed stirring mixes, and weighing is stand-by;
B component: sulphate-resistant cement 42.590Kg, SIO
2200 order 10Kg, CaCO
3500 order 30Kg, talcum powder 1250 order 10Kg, wollastonite powder 10Kg, calcium lignin sulphonate 0.1Kg in the twin screw dry powder blender (fully) mix, and sieve, and weighing is stand-by;
Below carry out promptly getting sulfate-resisting composite concrete paint of the present invention by embodiment 1 step.
Embodiment 3.
At normal temperatures and pressures, process A, B two components respectively, carry out according to the following steps:
The A component: the benzene emulsion 100Kg of BASF AG adds NOPCO company promoting agent polydimethylsiloxane, aerosil 0.5Kg, and high-speed stirring mixes, and weighing is stand-by;
B component: sulphate-resistant cement 42.570Kg, SIO
2200 order 30Kg, CaCO
3500 order 20Kg, talcum powder 1250 order 10Kg, wollastonite powder 10Kg, calcium lignin sulphonate 0.1Kg thorough mixing in the twin screw dry powder blender sieve, and weighing is stand-by;
Below carry out promptly getting sulfate-resisting composite concrete paint of the present invention by embodiment 1 step.
Comparative experimental example 1.
Further specify the supercoat outside in type concrete surface brushing that is used for of the present invention below by comparative experimental example, avoid extraneous vitriol to permeate in the performance of the formed coating of sulfate-resisting composite concrete paint of inside concrete.Test method with reference to " polymer cement waterproof paint " (JC/T894-2001), " polymer emulsion waterproof paint " (JC/T864-2000), the relevant requirements of " Rapid test for sulphate resistance of cement " GB2420-81 standard carries out, select market 5 kinds of coating A, B, C, D, E (be understandable that in comparative experimental example, only used code name and specifically do not indicate specific product) and sulfate-resisting composite concrete paint of the present invention under the same conditions, compare test and be divided into:
(1) Rapid Cycle test: the test specimen after the film forming is soaked in concentration respectively is respectively 5%, 10%, 15% Na
2SO
4In the solution 17 hours, putting into 75 ℃ of baking ovens 7 hours was a circulation, according to 3 weeks, 6 weeks, 9 weeks measuring film tensile strength and unit elongation after the circulation;
(2) 5%, 10%, 15%Na
2SO
4Soak in the solution, measure coating wt and change;
(3) 5%, 10%, 15%Na
2SO
4Soak in the solution, respectively at 2 weeks, 5 weeks, 9 week test mechanical property.See Table-1 through week immersion After-market coating materials A, C, D, E appearance change.
Table-1
| The film code name | Outward appearance |
| A (elastic coating) | 5%, 10%, 15% soaks Na 2SO 4After 7 days, the film surface is glossy, and bubble is loose, by swelling |
| C (waterproof paint) | 5%, 10% (grey) soaked Na 2SO 4After 7 days, the film surface is glossy, bubble, and loose, by swelling, 15% (film white) is more closely knit |
| D (pure acrylate dope) | 5%, 10%, 15% soaks Na 2SO 4After 7 days, the film surface is glossy, and bubble is loose, and is better than no cover by the swelling situation |
| E (phenylpropyl alcohol coating) | 5%, 10%, 15% soaks Na 2SO 4After 7 days, the film mattness has bubble, and is loose. |
Coating B (water-based anticorrosive paint) is identical with last table coating appearance after 2 weeks soaked, and the mechanical property decay of test back is serious, and what some had been corroded can not carry out mechanical test.
The formed coating of sulfate-resisting composite concrete paint of the present invention (F) mechanical property after 3 weeks, 6 weeks, the circulation of 9 weeks sees Table-2.
Table-2
Show that by above-mentioned data soaking the back mechanical property decays little
The formed coating of sulfate-resisting composite concrete paint of the present invention (F) mechanical property after 2 weeks, 5 weeks, 9 weeks soak sees Table-3.
Table-3
The formed coating of sulfate-resisting composite concrete paint of the present invention (F) weight rate (%) after soaking sees Table-4.
Table-4
The formed coating of above-mentioned evidence sulfate-resisting composite concrete paint of the present invention has the corrosion that resists based on the saline soil solution of vitriol, has defencive function 10～15 years planted agents; Have certain tensile strength and unit elongation, initial setting is б=1.2Mpa, ε=150%; Have and concrete bonding strength preferably, with " 8 " word or square test specimen method of testing, its bonding strength should be 1.2Mpa; Strength retention ratio should be 80%; Bridge joint crack ability is arranged, bridge width 0.5MM; Sulfate liquor increased after soaking in 7 days, weightlessness should be not more than 10%; Good salt spray resistance, humid soaked weight rate through nearly 650 hours and are no more than 5%, and appearance of coat is good, and material source is convenient, and environmental protection and workability are good, satisfy sulfate-resisting composite concrete paint and should satisfy the requirement that should possess.
Claims (3)
1. supercoat outside in type concrete surface brushing; stop extraneous sulfur acid salts solution to be penetrated into inside concrete and hydrated cementitious product generation chemical reaction; improve the security of concrete structure and the sulfate-resisting composite concrete paint of weather resistance, form by following component (weight part):
The A component:
100 parts of BASF AG's benzene emulsions
0.5 part of NOPCO company promoting agent polydimethylsiloxane, aerosil
The B component:
42.5 70～90 parts of sulphate-resistant cements
SIO
210～30 parts
CaCO
310～30 parts
10 parts of talcum powder
10 parts of wollastonite powders
0.1 part of calcium lignin sulphonate
2. according to the described sulfate-resisting composite concrete paint of claim 1, its best composition (weight part) consists of:
The A component:
100 parts of BASF AG's benzene emulsions
0.5 part of NOPCO company promoting agent polydimethylsiloxane, aerosil
The B component:
42.5 80 parts of sulphate-resistant cements
SIO
220 parts in 200 orders
CaCO
310 parts in 500 orders
10 parts in talcum powder 1250 orders
10 parts in wollastonite powder 800 orders
0.1 part of calcium lignin sulphonate
The preparation claim 1 described a kind of outside in type concrete surface brushing supercoat; stop extraneous sulfur acid salts solution to be penetrated into inside concrete and hydrated cementitious product generation chemical reaction; the method of the security of raising concrete structure and the sulfate-resisting composite concrete paint of weather resistance; it is characterized in that this sulfate-resisting composite concrete paint is divided into A, B two components; process the storage time spent respectively and now join, this method comprises by following steps to be formed:
(a) A component: 0.5 part of 100 parts+NOPCO of BASF AG's benzene emulsion company promoting agent polydimethylsiloxane, aerosil, high-speed stirring mixes, weighing and bagging;
(b) B component: 42.5 70～90 parts of sulphate-resistant cements, SIO
210～30 parts, CaCO
310～30 parts, 10 parts of talcum powder, 10 parts of wollastonite powders, 0.1 part of thorough mixing in the twin screw dry powder blender of calcium lignin sulphonate sieve weighing and bagging;
When (c) construction is used; in A: B=1: 1.2 ratios; weigh up A, B component; open and stir rifle, rotating speed reaches 500～600r/min, slowly adds the B material among the A; mix until A, B component; become the rubber cement shape be of the present invention outside in type concrete surface brushing supercoat, stop extraneous sulfur acid salts solution to be penetrated into inside concrete and hydrated cementitious product generation chemical reaction, improve the security of concrete structure and the sulfate-resisting composite concrete paint of weather resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100250402A CN100560665C (en) | 2005-04-13 | 2005-04-13 | Sulfate-resisting composite concrete paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100250402A CN100560665C (en) | 2005-04-13 | 2005-04-13 | Sulfate-resisting composite concrete paint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1847332A CN1847332A (en) | 2006-10-18 |
| CN100560665C true CN100560665C (en) | 2009-11-18 |
Family
ID=37077083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100250402A Expired - Fee Related CN100560665C (en) | 2005-04-13 | 2005-04-13 | Sulfate-resisting composite concrete paint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100560665C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104212263A (en) * | 2013-05-29 | 2014-12-17 | 上海惠邦特种涂料有限公司 | Outer wall severe salting-out resistant composite coating and construction technology |
| CN106278033B (en) * | 2016-08-11 | 2018-06-26 | 北京佑琳生科技有限公司 | A kind of radiation protection reflecting heat insulation paint |
| CN110117461A (en) * | 2019-04-17 | 2019-08-13 | 国网新疆电力有限公司经济技术研究院 | A kind of salty area chemical resistance of concrete type concrete surface layer reinforcer and preparation method thereof |
| CN111320438A (en) * | 2020-03-21 | 2020-06-23 | 上海石化安东混凝土有限公司 | Green environment-friendly concrete and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5962579A (en) * | 1997-09-26 | 1999-10-05 | The Goodyear Tire & Rubber Company | Coating for concrete structures |
| CN1073604C (en) * | 1995-09-22 | 2001-10-24 | 大关化学工业株式会社 | Coating composition for concrete structures |
-
2005
- 2005-04-13 CN CNB2005100250402A patent/CN100560665C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1073604C (en) * | 1995-09-22 | 2001-10-24 | 大关化学工业株式会社 | Coating composition for concrete structures |
| US5962579A (en) * | 1997-09-26 | 1999-10-05 | The Goodyear Tire & Rubber Company | Coating for concrete structures |
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| Publication number | Publication date |
|---|---|
| CN1847332A (en) | 2006-10-18 |
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Granted publication date: 20091118 Termination date: 20190413 |