CN111423149A - Concrete aggregate regulator and preparation process thereof - Google Patents
Concrete aggregate regulator and preparation process thereof Download PDFInfo
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- CN111423149A CN111423149A CN202010140277.XA CN202010140277A CN111423149A CN 111423149 A CN111423149 A CN 111423149A CN 202010140277 A CN202010140277 A CN 202010140277A CN 111423149 A CN111423149 A CN 111423149A
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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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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a concrete aggregate regulator and a preparation process thereof, wherein the concrete aggregate regulator comprises the following components in parts by weight: 470 portions of alcamines compound, 530 portions, 45 to 55 portions of sodium thiocyanate, 45 to 55 portions of anhydrous sodium metasilicate, 50 to 70 portions of lithium silicate, 2.5 to 3.5 portions of air entraining agent and 350 portions of water, 320 and 350 portions. The invention has the effect of reducing residual mortar on the surface of the aggregate.
Description
Technical Field
The invention relates to the technical field of concrete gel reducing agents, in particular to a concrete aggregate regulator and a preparation process thereof.
Background
With the rapid development of the economy of China and the enhancement of the environmental awareness of the China, the construction of cities and towns enters a period of rapid updating iteration, a large number of old buildings, a large number of shed house areas and urban villages are removed and transformed, and therefore a large amount of construction waste (waste concrete) is brought. The waste concrete in the construction waste is processed into the recycled aggregate, so that the problem of environmental pollution caused by the construction waste can be relieved to a great extent, and the problem of lack of construction material resources is solved.
In the prior art, a gel reducer is generally added to concrete containing recycled aggregate to increase the overall slurry amount of the concrete, so as to reduce the dosage of cement or other cementing materials. The recycled aggregate usually has part of old cement paste and mortar for building walls remained on the surface, and the cement reducing agent is difficult to adjust the aggregate, thereby influencing the quality of concrete.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a concrete aggregate conditioning agent which has the effect of reducing residual mortar on the surface of an aggregate.
The invention also aims to provide a preparation process of the concrete aggregate conditioning agent, which is simple and suitable for mass production.
In order to achieve the first object, the invention provides the following technical scheme:
a concrete aggregate regulator comprises the following components in parts by weight:
470 portions of alkanolamine compound and 530 portions of amine
45-55 parts of sodium thiocyanate
45-55 parts of zero-water sodium metasilicate
50-70 parts of lithium silicate
2.5 to 3.5 portions of air entraining agent
320 portions of water and 350 portions of water.
By adopting the technical scheme, the main materials of the regulator are composed of the alcohol amine compounds, sodium thiocyanate, sodium metasilicate with zero water and lithium silicate, and the flocculation structure of cement particles is hindered or destroyed through surface activity, complexation, electrostatic repulsion force or steric repulsion force, so that the workability and strength of concrete can be ensured while the cement consumption is saved; the alcohol amine compound contains an amide group, the amide group has stronger polarity, and the amide group has stronger hydrogen bond association capacity, so that the amide group generally has stronger high temperature resistance and stability, thereby being beneficial to improving the stability and the high temperature resistance of concrete and improving the durability of the concrete;
the sodium thiocyanate is a common early strength agent, so that the setting time of the concrete can be shortened, the early strength is improved, and the construction of the concrete in winter is facilitated; the zero-water sodium metasilicate is silicate, has the performance of descaling and dispersion, and can uniformly disperse all components of the regulator, so that the dispersity of the regulator is improved, and the regulator can be uniformly dispersed in concrete;
lithium silicate can react with calcium hydroxide in concrete to generate tricalcium silicate with excellent chemical stability, and the tricalcium silicate is insoluble in water and has good compactness and wear resistance, so that the porosity of the surface of the concrete is reduced, and the flatness of the surface of the concrete is improved;
the air entraining agent is a hydrophobic surfactant, is dissolved in water and then is added into the concrete mixture, and can generate a large amount of micro-bubble mortar to wash down in the stirring process so that the mortar is uniformly dispersed in the concrete; the mortar on the surface of the aggregate is reduced, so that the surface of the aggregate is smooth, and the porosity of the concrete is reduced.
The invention is further provided with: the air entraining agent is rosin resin air entraining agent.
By adopting the technical scheme, the rosin resin air entraining agent is formed by improving various functional materials such as natural nonionic tea saponin, anionic surface active resin and the like; the method has the characteristics of reducing the surface tension of the solution, generating closed independent bubbles, having high foaming times, large number of bubbles, small space between bubbles and long foam stabilizing time, obviously improving the working performance of plastic concrete and improving the durability of hardened concrete.
The invention is further provided with: the paint also comprises the following components in parts by weight: 10-20 parts of lignin.
By adopting the technical scheme, the lignin is an anionic surface active substance and has adsorption and dispersion effects on cement, so that the water cement ratio can be reduced, the using amount of the cement is reduced, the workability, the fluidity and the anti-permeability of concrete are improved, and the strength and the compactness of the concrete are improved.
The invention is further provided with: the paint also comprises the following components in parts by weight: 6-10 parts of carbon black.
By adopting the technical scheme, the carbon black particles have a microcrystalline structure, and the arrangement mode of carbon atoms in the carbon black is similar to that of graphite to form a hexagonal plane, so that the carbon black has good stability, and the concrete has good stability; meanwhile, the carbon black is superfine powder dispersed in the concrete, has good lubricating effect and ensures that all components of the concrete are uniformly dispersed.
The invention is further provided with: the alcohol amine compound comprises one or more of triethanolamine, triisopropanolamine and diethanolamine.
The invention is further provided with: the alcohol amine compound is prepared from triethanolamine, triisopropanolamine and diethanolamine according to the weight part ratio of 8: 9: 8, and mixing.
The invention is further provided with: the composition comprises the following components in parts by weight: 160 parts of triethanolamine, 180 parts of triisopropanolamine, 160 parts of diethanolamine, 50 parts of sodium thiocyanate, 50 parts of anhydrous sodium metasilicate, 60 parts of lithium silicate, 3 parts of an air entraining agent and 337 parts of water.
The second technical purpose of the invention is realized by the following technical scheme: the method specifically comprises the following steps:
step 1, adding corresponding parts by weight of sodium metasilicate anhydrous and sodium thiocyanate into water according to the parts by weight of the formula, heating to 40-50 ℃, and stirring for 30-50min to obtain a mixture;
step 2, adding corresponding parts by weight of triethanolamine, triisopropanolamine, diethanolamine, lithium silicate and air entraining agent continuously in the step 1, and stirring for 15-25 min;
and 3, mixing the mixed solution obtained in the step 2 in a ratio of 1: and (11-13) diluting with water to obtain the finished product.
By adopting the technical scheme, the preparation process is simple and is suitable for mass production.
The invention is further provided with: and (3) adding lignin in corresponding parts by weight in the step 2.
By adopting the technical scheme, the lignin is an anionic surface active substance and has adsorption and dispersion effects on cement, so that the water cement ratio can be reduced, and the dosage of the cement is reduced.
The invention is further provided with: and (3) adding carbon black in corresponding weight parts in the step 2.
By adopting the technical scheme, the carbon black is superfine powder and is dispersed in the concrete, so that the lubricating effect is good, and the components of the concrete are uniformly dispersed.
In conclusion, the beneficial technical effects of the invention are as follows:
1. the air entraining agent is a hydrophobic surfactant, is dissolved in water and then is added into the concrete mixture, and can generate a large amount of micro-bubble mortar to wash down in the stirring process so that the mortar is uniformly dispersed in the concrete; the mortar on the surface of the aggregate is reduced, so that the surface of the aggregate is smooth, and the porosity of the concrete is reduced;
2. the lignin is an anionic surface active substance and has adsorption and dispersion effects on cement, so that the water cement ratio can be reduced, the using amount of the cement is reduced, the workability, the fluidity and the anti-permeability of concrete are improved, and the strength and the compactness of the concrete are improved;
3. the carbon black is superfine powder dispersed in concrete, has good lubricating effect and enables components of the concrete to be uniformly dispersed.
Detailed Description
The present invention will be described in further detail with reference to examples.
The starting materials used in the examples are all commercially available.
Example 1:
the raw material composition and the proportion of the concrete aggregate conditioning agent provided in example 1 are shown in table 1.
The preparation of the impression material provided in example 1 is as follows:
step 1, adding corresponding parts by weight of sodium metasilicate anhydrous and sodium thiocyanate into water according to the parts by weight of the formula, heating to 45 ℃, and stirring for 40min to obtain a mixture;
step 2, adding corresponding parts by weight of triethanolamine, triisopropanolamine, diethanolamine, lithium silicate, an air entraining agent, lignin and carbon black into the step 1, and continuously stirring for 20 min;
and 3, mixing the mixed solution obtained in the step 2 in a ratio of 1: diluting with water at the ratio of 12 to obtain a finished product: regulator 1.
Table 1 composition and proportions of the raw materials of example 1
| Raw materials | Dosage (kg) | Raw materials | Dosage (kg) |
| Triethanolamine | 160 | Zero water sodium metasilicate | 50 |
| Triisopropanolamine | 180 | Lithium silicate | 60 |
| Diethanolamine (DEA) | 160 | Rosin | 3 |
| Sodium thiocyanate | 50 | Water (W) | 337 |
| Lignin | 15 | Carbon black | 8 |
Example 2:
the raw material composition and the proportion of the concrete aggregate conditioning agent provided by the embodiment 2 are shown in a table 2, the preparation method is the same as that of the embodiment 1, and the obtained finished product is as follows: and (3) a regulator 2.
Table 2 composition and proportions of the raw materials of example 2
| Raw materials | Dosage (kg) | Raw materials | Dosage (kg) |
| N-methyldiethanolamine | 170 | Zero water sodium metasilicate | 55 |
| Triisopropanolamine | 190 | Lithium silicate | 70 |
| Diethanolamine (DEA) | 170 | Sodium alkyl benzene sulfonate | 3 |
| Sodium thiocyanate | 55 | Water (W) | 350 |
| Lignin | 15 | Carbon black | 8 |
Example 3:
the raw material composition and the proportion of the concrete aggregate conditioning agent provided by the embodiment 3 are shown in a table 3, the preparation method is the same as that of the embodiment 1, and the obtained finished product is as follows: and (3) a regulator.
Table 3 composition and proportions of the raw materials of example 3
| Raw materials | Dosage (kg) | Raw materials | Dosage (kg) |
| Ethanolamine | 170 | Zero water sodium metasilicate | 55 |
| N-methyldiethanolamine | 190 | Lithium silicate | 70 |
| Diethanolamine (DEA) | 170 | Sodium salt of fatty alcohol sulfonic acid | 3 |
| Sodium thiocyanate | 55 | Water (W) | 350 |
| Lignin | 15 | Carbon black | 8 |
Example 4:
the raw material composition and the proportion of the concrete aggregate conditioning agent provided in example 4 are shown in table 4, the preparation method is the same as that of example 1, and the obtained finished product is as follows: and (3) a regulator 4.
Table 4 composition and proportions of the raw materials of example 4
Example 5:
the raw material composition and the proportion of the concrete aggregate conditioning agent provided in example 5 are shown in table 5, the preparation method is the same as that of example 1, and the obtained finished product is as follows: and (3) a regulator 5.
Table 5 composition and proportions of the raw materials of example 5
| Raw materials | Dosage (kg) | Raw materials | Dosage (kg) |
| Triethanolamine | 170 | Zero water sodium metasilicate | 55 |
| Triisopropanolamine | 190 | Lithium silicate | 70 |
| Diethanolamine (DEA) | 170 | Rosin | 3.5 |
| Sodium thiocyanate | 55 | Water (W) | 350 |
| Lignin | 20 | Carbon black | 0 |
Example 6:
the raw material composition and the mixture ratio of the concrete aggregate conditioning agent provided in the embodiment 6 are shown in a table 6, the preparation method is the same as that of the embodiment 1, and the obtained finished product is as follows: and (3) a regulator 6.
Table 6 composition and proportions of the raw materials of example 6
| Raw materials | Dosage (kg) | Raw materials | Dosage (kg) |
| Triethanolamine | 160 | Zero water sodium metasilicate | 50 |
| Triisopropanolamine | 180 | Lithium silicate | 60 |
| Diethanolamine (DEA) | 160 | Rosin | 3 |
| Sodium thiocyanate | 50 | Water (W) | 337 |
| Lignin | 15 | Carbon black | 0 |
Example 7:
the raw material composition and the proportion of the concrete aggregate conditioning agent provided in example 7 are shown in table 7, the preparation method is the same as that in example 1, and the obtained finished product is as follows: and (3) a regulator 7.
Table 7 composition and proportions of the raw materials of example 7
| Raw materials | Dosage (kg) | Raw materials | Dosage (kg) |
| Triethanolamine | 150 | Zero water sodium metasilicate | 45 |
| Triisopropanolamine | 170 | Lithium silicate | 52 |
| Diethanolamine (DEA) | 150 | Rosin | 2.5 |
| Sodium thiocyanate | 46 | Water (W) | 320 |
| Lignin | 11 | Carbon black | 6 |
Example 8:
the raw material composition and the proportion of the concrete aggregate conditioning agent provided in example 8 are shown in table 8, the preparation method is the same as that in example 1, and the obtained finished product is as follows: and (3) a regulator 8.
Table 8 composition and proportions of the raw materials of example 8
Comparative example 1:
the raw material composition and the mixture ratio of the concrete aggregate conditioning agent provided in the comparative example 1 are shown in a table 9, the preparation method is the same as that of the example 1, and the obtained finished product is as follows: a modulator a.
TABLE 9 composition and compounding ratio of raw materials for comparative example 1
| Raw materials | Dosage (kg) | Raw materials | Dosage (kg) |
| Triethanolamine | 168 | Zero water sodium metasilicate | 55 |
| Triisopropanolamine | 195 | Lithium silicate | 70 |
| Diethanolamine (DEA) | 170 | Rosin | 0 |
| Sodium thiocyanate | 55 | Water (W) | 350 |
| Lignin | 0 | Carbon black | 0 |
Comparative example 2:
the raw material composition and the mixture ratio of the concrete aggregate conditioning agent provided in the comparative example 2 are shown in the table 10, the preparation method is the same as that of the example 1, and the obtained finished product is as follows: and (b) a regulator.
TABLE 10 raw material composition and compounding ratio of comparative example 2
| Raw materials | Dosage (kg) | Raw materials | Dosage (kg) |
| Triethanolamine | 140 | Zero water sodium metasilicate | 45 |
| Triisopropanolamine | 160 | Lithium silicate | 50 |
| Diethanolamine (DEA) | 140 | Rosin | 3 |
| Sodium thiocyanate | 40 | Water (W) | 337 |
| Lignin | 0 | Carbon black | 6 |
Comparative example 3:
the raw material composition and the mixture ratio of the concrete aggregate conditioning agent provided in the comparative example 3 are shown in table 11, the preparation method is the same as that of the example 1, and the obtained finished product is as follows: a modulator c.
TABLE 11 raw material composition and compounding ratio of comparative example 3
| Raw materials | Dosage (kg) | Raw materials | Dosage (kg) |
| Triethanolamine | 170 | Zero water sodium metasilicate | 55 |
| Triisopropanolamine | 190 | Lithium silicate | 70 |
| Diethanolamine (DEA) | 170 | Rosin | 3.5 |
| Sodium thiocyanate | 55 | Water (W) | 350 |
| Lignin | 0 | Carbon black | 10 |
Performance detection
The concrete aggregate modifier raw materials provided in examples 1 to 8 and comparative examples 1 to 3 of the present application were used to prepare the same grade of concrete, and the composition and ratio of the raw materials for preparing the concrete corresponding to each modifier are shown in table 12.
TABLE 12 raw material composition and proportioning of corresponding prepared concrete of regulator
The prepared concrete was subjected to the following performance tests, and the test data are shown in table 13.
Table 13 table of performance testing data
The present invention is described in detail below with reference to the data provided in tables 12 and 13.
The data in table 12 were analyzed by comparison. As a result, the regulator is not added into the concrete 0, and the regulators are added into other groups of concrete, and the component analysis shows that the addition of the regulator reduces the cement consumption required in the production of the concrete, thereby reducing the waste of cement resources.
A comparison was made between examples 1 to 3 and comparative examples 1 to 2. As a result, it was found that the rosin air entraining agent has a minimal effect on the porosity of the concrete, minimizes the air content of the concrete, and it can improve the workability of plastic concrete and enhance the durability of hardened concrete.
Comparison is made by examples 4-6. As a result, the lignin is an anionic surface active substance and has the functions of adsorbing and dispersing cement, so that the water cement ratio can be reduced, the using amount of the cement can be reduced, the workability, the fluidity and the anti-permeability of concrete can be improved, and the strength and the compactness of the concrete can be improved.
A comparison was made between examples 1, 7 and 8 and comparative examples 2 to 3. The result shows that the carbon black is extremely fine powder which is dispersed in the concrete and has good lubricating effect, so that the components of the concrete are uniformly dispersed, and the compactness of the concrete is improved; meanwhile, after the lignin and the carbon black are mixed, the strength of the concrete can be obviously improved.
The present embodiment is only for explaining the present invention, and not for limiting the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as needed after reading the present specification, but all of which are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. A concrete aggregate regulator is characterized in that: the composition comprises the following components in parts by weight:
470 portions of alkanolamine compound and 530 portions of amine
45-55 parts of sodium thiocyanate
45-55 parts of zero-water sodium metasilicate
50-70 parts of lithium silicate
2.5 to 3.5 portions of air entraining agent
320 portions of water and 350 portions of water.
2. The concrete aggregate conditioner according to claim 1, wherein: the air entraining agent is rosin resin air entraining agent.
3. The concrete aggregate conditioner according to claim 1, wherein: the paint also comprises the following components in parts by weight: 10-20 parts of lignin.
4. A concrete aggregate modifier according to claim 3, wherein: the paint also comprises the following components in parts by weight: 6-10 parts of carbon black.
5. The concrete aggregate conditioner according to claim 1, wherein: the alcohol amine compound comprises one or more of triethanolamine, triisopropanolamine and diethanolamine.
6. The concrete aggregate conditioner according to claim 5, wherein: the alcohol amine compound is prepared from triethanolamine, triisopropanolamine and diethanolamine according to the weight part ratio of 8: 9: 8, and mixing.
7. The concrete aggregate conditioner according to claim 5, wherein: the composition comprises the following components in parts by weight: 160 parts of triethanolamine, 180 parts of triisopropanolamine, 160 parts of diethanolamine, 50 parts of sodium thiocyanate, 50 parts of anhydrous sodium metasilicate, 60 parts of lithium silicate, 3 parts of an air entraining agent and 337 parts of water.
8. The preparation process of the concrete aggregate conditioning agent according to claim 5, characterized in that: the method specifically comprises the following steps:
step 1, adding corresponding parts by weight of sodium metasilicate anhydrous and sodium thiocyanate into water according to the parts by weight of the formula, heating to 40-50 ℃, and stirring for 30-50min to obtain a mixture;
step 2, adding corresponding parts by weight of triethanolamine, triisopropanolamine, diethanolamine, lithium silicate and air entraining agent continuously in the step 1, and stirring for 15-25 min;
and 3, mixing the mixed solution obtained in the step 2 in a ratio of 1: and (11-13) diluting with water to obtain the finished product.
9. The preparation process of the concrete aggregate conditioning agent according to claim 8, characterized in that: and (3) adding lignin in corresponding parts by weight in the step 2.
10. The preparation process of the concrete aggregate conditioning agent according to claim 9, characterized in that: and (3) adding carbon black in corresponding weight parts in the step 2.
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|---|---|---|---|
| CN202010140277.XA CN111423149B (en) | 2020-03-03 | 2020-03-03 | Concrete aggregate regulator and preparation process thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103145368A (en) * | 2013-03-07 | 2013-06-12 | 北京新奥混凝土集团有限公司 | Early-strength water reducer for recycled aggregate concrete |
| CN104310843A (en) * | 2014-09-26 | 2015-01-28 | 北京建筑大学 | Clay-resistant concrete function additive and preparation method thereof |
| CN106007536A (en) * | 2016-05-27 | 2016-10-12 | 宜兴市太湖地基工程有限公司 | High-solidification concrete and preparation method thereof |
| US20170226012A1 (en) * | 2014-09-30 | 2017-08-10 | Nippon Shokubai Co., Ltd. | Shrinkage-reducing agent for hydraulic material |
| CN110759661A (en) * | 2019-11-01 | 2020-02-07 | 辽宁省交通高等专科学校 | Recycled aggregate concrete workability improving additive |
-
2020
- 2020-03-03 CN CN202010140277.XA patent/CN111423149B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103145368A (en) * | 2013-03-07 | 2013-06-12 | 北京新奥混凝土集团有限公司 | Early-strength water reducer for recycled aggregate concrete |
| CN104310843A (en) * | 2014-09-26 | 2015-01-28 | 北京建筑大学 | Clay-resistant concrete function additive and preparation method thereof |
| US20170226012A1 (en) * | 2014-09-30 | 2017-08-10 | Nippon Shokubai Co., Ltd. | Shrinkage-reducing agent for hydraulic material |
| CN106007536A (en) * | 2016-05-27 | 2016-10-12 | 宜兴市太湖地基工程有限公司 | High-solidification concrete and preparation method thereof |
| CN110759661A (en) * | 2019-11-01 | 2020-02-07 | 辽宁省交通高等专科学校 | Recycled aggregate concrete workability improving additive |
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