CN107759122B - Concrete glue reducing agent - Google Patents
Concrete glue reducing agent Download PDFInfo
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- CN107759122B CN107759122B CN201711110209.3A CN201711110209A CN107759122B CN 107759122 B CN107759122 B CN 107759122B CN 201711110209 A CN201711110209 A CN 201711110209A CN 107759122 B CN107759122 B CN 107759122B
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F228/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a bond to sulfur or by a heterocyclic ring containing sulfur
- C08F228/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a bond to sulfur or by a heterocyclic ring containing sulfur by a bond to sulfur
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
Abstract
The invention belongs to the technical field of building materials, and discloses a concrete gel reducing agent which is prepared from the following raw materials in parts by weight: 20-30 parts of vitamin C waste mother liquor, 0.01-0.05 part of coco glucoside, 5-8 parts of complexing agent, 30-40 parts of dispersing agent, 2-3 parts of reinforcing agent and 40-60 parts of water. The gel reducing agent of the invention can lead the gelled material particles to obtain better dispersion effect through the synergistic effect of the components, effectively promote the hydration reaction efficiency of the system, reduce the cement consumption in concrete by more than 10 percent, reduce the production cost of the concrete and reduce the concrete cracking caused by excessive gelled material.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a concrete gel reducing agent.
Technical Field
Commercial concrete has begun to replace on-site mixed concrete in a large scale for various constructions since the 90 s of the 20 th century. In order to meet the requirements of high workability and strength of concrete, the dosage of the cementing material in commercial concrete is generally higher, and is generally 350kg/m3The above. The high amount of cementitious material in the concrete makes the concrete more prone to cracking, which is especially the case with lower cement. In addition, the research data of the hydration degree of cement in concrete at home and abroad shows that about 20-30% of cement in concrete does not participate in hydration reaction under the conventional environment. The production process of cement needs consumed resources such as limestone and clay and energy resources such as electric power and coal, and a large amount of surplus cement in concrete can cause resource waste and has great influence on the environment.
Disclosure of Invention
Aiming at the problems, the invention provides the concrete gel reducing agent, and the cement dosage can be effectively reduced under the condition of ensuring the working performance and physical performance of concrete after the gel reducing agent is added. In order to achieve the purpose, the invention adopts the following technical scheme:
the concrete gel reducing agent is prepared from the following raw materials in parts by weight: 20-30 parts of vitamin C waste mother liquor, 0.01-0.05 part of coco glucoside, 5-8 parts of complexing agent, 30-40 parts of dispersing agent, 2-3 parts of reinforcing agent and 40-60 parts of water.
The waste vitamin C mother liquor is waste liquor generated in the process of producing crude Vc by crystallization, and contains gulonic acid, Vc, glucose, organic acid and other substances.
The complexing agent is one of tannic acid, fulvic acid, amino trimethylene phosphonic acid and diethylenetriamine pentamethylene phosphonic acid.
Preferably, the complexing agent is fulvic acid.
The dispersing agent contains alpha-olefin sodium sulfonate-methacrylic acid copolymer.
Preferably, the preparation method of the dispersant is as follows: adding raw materials of alpha-olefin sodium sulfonate, 2-acrylamide-2-methylpropanesulfonic acid and deionized water into a reactor, introducing nitrogen to remove oxygen for 10-20min, heating to 60-90 ℃, dropwise adding ammonium persulfate aqueous solution and methacrylic acid which are respectively placed within 3-6h, continuing to react for 1-2h, and cooling to room temperature to obtain the dispersing agent. Wherein the molar ratio of the methacrylic acid to the alpha-olefin sodium sulfonate is 1-3:1, the weight of the 2-acrylamide-2-methylpropanesulfonic acid is 1-3 percent of the total weight of the methacrylic acid and the alpha-olefin sodium sulfonate, the total weight of the sodium persulfate is 2-4 percent of the total weight of the methacrylic acid and the alpha-olefin sodium sulfonate, and the total weight of the deionized water in the reaction is 2-4 times of the total weight of reactants.
Optionally, the dispersant is polyethyleneimine with the polymerization degree of 60-80.
The reinforcing agent consists of ammonium thiosulfate, ammonium humate and diethanolisopropanolamine.
Preferably, the reinforcing agent consists of ammonium thiosulfate, ammonium humate and diethanolisopropanolamine in a weight ratio of 5-8:3-5: 1.
More preferably, the reinforcing agent consists of ammonium thiosulfate, ammonium humate and diethanolisopropanolamine in a weight ratio of 6:3: 1.
In the invention, the vitamin C waste mother liquor contains a large number of molecules with hydroxyl and carboxyl functional groups, has the functions of dispersing and reducing water, particularly has good synergistic effect with the polycarboxylic acid water reducing agent widely used at present, can effectively improve the water reducing rate of the water reducing agent, and can reduce the consumption of water and cement under the condition of ensuring the same working performance of concrete; the complexing agent can reduce the adsorption of metal ions in the sandstone aggregate and the cementing material to the water reducing agent and improve the performance of the water reducing agent through complexing and ion exchange. The reinforcing component in the invention can fully activate the mineral admixture with potential activity, thereby improving the hydration degree of the cementing material and the strength of concrete.
Due to the progress of the grinding process, the particles of the cementing materials such as mineral powder and cement used in the existing concrete are finer, when the cementing materials meet mixing water, the cementing material particles are easy to attract each other to form a three-dimensional flocculent structure, including partial mixing water, so that the fluidity of the concrete is reduced, and the water reducing agent in the existing market cannot effectively disperse the flocculent structure of ultrafine particles. The dispersing agent can effectively disperse the flocculation structures, so that the gelled material particles are more fully contacted with water, on one hand, the dispersing agent can help release water wrapped in the flocculation structures and improve the fluidity of concrete, and on the other hand, the gelled material is more fully contacted with water and the reaction activity is improved. It is worth to say that the dispersant of the invention is prepared by polymerization reaction, the conversion rate can not reach one hundred percent, and the final product is composed of unreacted monomers such as alpha-olefin sodium sulfonate and the like and the generated polymer, and does not need to be separated. The alpha-olefin sodium sulfonate has a certain air entraining function, and can introduce a large amount of stable micro bubbles under the combined action of the alpha-olefin sodium sulfonate and the coco glucoside, so that the fluidity of concrete can be increased, the workability of the concrete can be improved, and the freeze-thaw resistance of the concrete can be improved.
The invention has the advantages of
Through the synergistic effect among the components, the cementing material particles obtain a better dispersion effect, the hydration reaction efficiency of a system is effectively promoted, the cement consumption in concrete can be reduced by more than 10%, the production cost of the concrete is reduced, and the concrete cracking caused by excessive cementing materials can be reduced.
Detailed Description
The present invention will be further described in detail with reference to the following specific examples, which are not intended to limit the invention in any manner.
Example 1
The concrete gel reducing agent is prepared from the following raw materials in parts by weight: 20 parts of waste vitamin C mother liquor, 0.05 part of coco glucoside, 5 parts of complexing agent, 40 parts of dispersing agent, 2 parts of reinforcing agent and 60 parts of water. The waste vitamin C mother liquor is waste liquor generated in the process of producing crude Vc by crystallization, and contains gulonic acid, Vc, glucose, organic acid and other substances.
The complexing agent is tannic acid.
The dispersing agent contains alpha-olefin sodium sulfonate-methacrylic acid copolymer.
The reinforcing agent consists of ammonium thiosulfate, ammonium humate and diethanolisopropanolamine.
Example 2
The concrete gel reducing agent is prepared from the following raw materials in parts by weight: 30 parts of vitamin C waste mother liquor, 0.01 part of coco glucoside, 8 parts of complexing agent, 30 parts of dispersing agent, 3 parts of reinforcing agent and 40 parts of water. The waste vitamin C mother liquor is waste liquor generated in the process of producing crude Vc by crystallization, and contains gulonic acid, Vc, glucose, organic acid and other substances.
The complexing agent is amino trimethylene phosphonic acid.
The preparation method of the dispersant comprises the following steps: adding raw materials of alpha-olefin sodium sulfonate, 2-acrylamide-2-methylpropanesulfonic acid and deionized water into a reactor, introducing nitrogen to remove oxygen for 10min, heating to 90 ℃, dropwise adding ammonium persulfate aqueous solution and methacrylic acid which are respectively placed within 3h, continuously reacting for 2h, and cooling to room temperature to obtain the dispersing agent. Wherein the molar ratio of the methacrylic acid to the alpha-olefin sodium sulfonate is 1:1, the weight of the 2-acrylamide-2-methylpropanesulfonic acid is 3 percent of the total weight of the methacrylic acid and the alpha-olefin sodium sulfonate, the total weight of the sodium persulfate is 2 percent of the total weight of the methacrylic acid and the alpha-olefin sodium sulfonate, and the total weight of the deionized water in the reaction is 4 times of the total weight of reactants.
The reinforcing agent consists of ammonium thiosulfate, ammonium humate and diethanolisopropanolamine in a weight ratio of 5:5: 1.
Example 3
The concrete gel reducing agent is prepared from the following raw materials in parts by weight: 25 parts of waste vitamin C mother liquor, 0.04 part of coco glucoside, 7 parts of complexing agent, 36 parts of dispersing agent, 2.4 parts of reinforcing agent and 45 parts of water.
The complexing agent is diethylenetriamine pentamethylene phosphonic acid.
The dispersant contains alpha-olefin sodium sulfonate-methacrylic acid copolymer, and the preparation method comprises the following steps: adding raw materials of alpha-olefin sodium sulfonate, 2-acrylamide-2-methylpropanesulfonic acid and deionized water into a reactor, introducing nitrogen to remove oxygen for 20min, heating to 60 ℃, dropwise adding ammonium persulfate aqueous solution and methacrylic acid which are respectively placed within 6h, continuing to react for 1h, and cooling to room temperature to obtain the dispersing agent. Wherein the molar ratio of the methacrylic acid to the alpha-olefin sodium sulfonate is 3:1, the weight of the 2-acrylamide-2-methylpropanesulfonic acid is 1 percent of the total weight of the methacrylic acid and the alpha-olefin sodium sulfonate, the total weight of the sodium persulfate is 4 percent of the total weight of the methacrylic acid and the alpha-olefin sodium sulfonate, and the total weight of the deionized water in the reaction is 2 times of the total weight of reactants.
The reinforcing agent consists of ammonium thiosulfate, ammonium humate and diethanolisopropanolamine in a weight ratio of 8:3: 1.
Example 4
The concrete gel reducing agent is prepared from the following raw materials in parts by weight: 27 parts of waste vitamin C mother liquor, 0.02 part of coco glucoside, 6 parts of complexing agent, 35 parts of dispersing agent, 2.1 parts of reinforcing agent and 51 parts of water. The waste vitamin C mother liquor is waste liquor generated in the process of producing crude Vc by crystallization, and contains gulonic acid, Vc, glucose, organic acid and other substances.
The complexing agent is fulvic acid.
The preparation method of the dispersant comprises the following steps: adding raw materials of alpha-olefin sodium sulfonate, 2-acrylamide-2-methylpropanesulfonic acid and deionized water into a reactor, introducing nitrogen to remove oxygen for 16min, heating to 74 ℃, dropwise adding ammonium persulfate aqueous solution and methacrylic acid which are respectively placed within 4h, continuously reacting for 1.5h, and cooling to room temperature to obtain the dispersing agent. Wherein the molar ratio of the methacrylic acid to the alpha-olefin sodium sulfonate is 2:1, the weight of the 2-acrylamide-2-methylpropanesulfonic acid is 2.5 percent of the total weight of the methacrylic acid and the alpha-olefin sodium sulfonate, the total weight of the sodium persulfate is 3 percent of the total weight of the methacrylic acid and the alpha-olefin sodium sulfonate, and the total weight of the deionized water in the reaction is 2.8 times of the total weight of reactants.
The reinforcing agent consists of ammonium thiosulfate, ammonium humate and diethanolisopropanolamine in a weight ratio of 6:3: 1.
Example 5
The concrete gel reducing agent is prepared from the following raw materials in parts by weight: 28 parts of waste vitamin C mother liquor, 0.04 part of coco glucoside, 8 parts of complexing agent, 34 parts of dispersing agent, 2.8 parts of reinforcing agent and 56 parts of water.
The complexing agent is fulvic acid.
The dispersing agent is polyethyleneimine with the polymerization degree of 60-80.
The reinforcing agent consists of ammonium thiosulfate, ammonium humate and diethanolisopropanolamine.
Example 6
The concrete gel reducing agent is prepared from the following raw materials in parts by weight: 23 parts of vitamin C waste mother liquor, 0.035 part of coco glucoside, 6.5 parts of complexing agent, 36 parts of dispersing agent, 2.2 parts of reinforcing agent and 48 parts of water.
Comparative example 1
The concrete gel reducing agent is prepared from the following raw materials in parts by weight: 0.02 part of coco glucoside, 6 parts of complexing agent, 35 parts of dispersing agent, 2.1 parts of reinforcing agent and 51 parts of water.
The complexing agent is fulvic acid.
The preparation method of the dispersant comprises the following steps: adding raw materials of alpha-olefin sodium sulfonate, 2-acrylamide-2-methylpropanesulfonic acid and deionized water into a reactor, introducing nitrogen to remove oxygen for 16min, heating to 74 ℃, dropwise adding ammonium persulfate aqueous solution and methacrylic acid which are respectively placed within 4h, continuously reacting for 1.5h, and cooling to room temperature to obtain the dispersing agent. Wherein the molar ratio of the methacrylic acid to the alpha-olefin sodium sulfonate is 2:1, the weight of the 2-acrylamide-2-methylpropanesulfonic acid is 2.5 percent of the total weight of the methacrylic acid and the alpha-olefin sodium sulfonate, the total weight of the sodium persulfate is 3 percent of the total weight of the methacrylic acid and the alpha-olefin sodium sulfonate, and the total weight of the deionized water in the reaction is 2.8 times of the total weight of reactants.
The reinforcing agent consists of ammonium thiosulfate, ammonium humate and diethanolisopropanolamine in a weight ratio of 6:3: 1.
Comparative example 2
The concrete gel reducing agent is prepared from the following raw materials in parts by weight: 27 parts of waste vitamin C mother liquor, 0.02 part of coco glucoside, 35 parts of a dispersing agent, 2.1 parts of an enhancer and 51 parts of water.
The waste vitamin C mother liquor is waste liquor generated in the process of producing crude Vc by crystallization, and contains gulonic acid, Vc, glucose, organic acid and other substances.
The preparation method of the dispersant comprises the following steps: adding raw materials of alpha-olefin sodium sulfonate, 2-acrylamide-2-methylpropanesulfonic acid and deionized water into a reactor, introducing nitrogen to remove oxygen for 16min, heating to 74 ℃, dropwise adding ammonium persulfate aqueous solution and methacrylic acid which are respectively placed within 4h, continuously reacting for 1.5h, and cooling to room temperature to obtain the dispersing agent. Wherein the molar ratio of the methacrylic acid to the alpha-olefin sodium sulfonate is 2:1, the weight of the 2-acrylamide-2-methylpropanesulfonic acid is 2.5 percent of the total weight of the methacrylic acid and the alpha-olefin sodium sulfonate, the total weight of the sodium persulfate is 3 percent of the total weight of the methacrylic acid and the alpha-olefin sodium sulfonate, and the total weight of the deionized water in the reaction is 2.8 times of the total weight of reactants.
The reinforcing agent consists of ammonium thiosulfate, ammonium humate and diethanolisopropanolamine in a weight ratio of 6:3: 1.
Comparative example 3
The concrete gel reducing agent is prepared from the following raw materials in parts by weight: 27 parts of waste vitamin C mother liquor, 0.02 part of coco glucoside, 6 parts of complexing agent, 2.1 parts of reinforcing agent and 51 parts of water.
The waste vitamin C mother liquor is waste liquor generated in the process of producing crude Vc by crystallization, and contains gulonic acid, Vc, glucose, organic acid and other substances.
The complexing agent is fulvic acid.
The reinforcing agent consists of ammonium thiosulfate, ammonium humate and diethanolisopropanolamine in a weight ratio of 6:3: 1.
Performance testing
The concrete gel reducing agent prepared in the examples 1 to 6 and the comparative examples 1 to 3 of the invention is applied to concrete, and compared with a blank sample without adding or reducing the gel agent, the cement uses common Portland cement with the label of 42.5, sand is river sand, and stones are 2-25mm continuous graded broken stones. The mixing amount of the gel reducing agent is 0.5 percent of the total gelled material. The performance of the concrete mixture is tested according to GB/T50080 Standard test method for the Performance of common concrete mixtures; the concrete strength is tested according to GB/T50081 Standard test method for mechanical Properties of ordinary concrete. The concrete mix proportions are shown in Table 1, and the performance results are shown in Table 2.
TABLE 1 concrete mix proportion
TABLE 2 Performance results
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The concrete gel reducing agent is prepared from the following raw materials in parts by weight: 20-30 parts of vitamin C waste mother liquor, 0.01-0.05 part of coco glucoside, 5-8 parts of complexing agent, 30-40 parts of dispersing agent, 2-3 parts of reinforcing agent and 40-60 parts of water; the dispersing agent contains alpha-olefin sodium sulfonate-methacrylic acid copolymer; the reinforcing agent consists of ammonium thiosulfate, ammonium humate and diethanolisopropanolamine; the preparation method of the dispersant comprises the following steps: adding raw materials of alpha-olefin sodium sulfonate, 2-acrylamide-2-methylpropanesulfonic acid and deionized water into a reactor, introducing nitrogen to remove oxygen for 10-20min, heating to 60-90 ℃, dropwise adding sodium persulfate aqueous solution and methacrylic acid which are respectively placed within 3-6h, continuing to react for 1-2h, and cooling to room temperature to obtain the dispersing agent; the complexing agent is fulvic acid; the waste vitamin C mother liquor is waste liquor produced in the process of producing crude Vc by crystallization, and comprises gulonic acid, Vc, glucose and organic acid.
2. The concrete gel reducer according to claim 1, wherein in the preparation process of the dispersant, the molar ratio of methacrylic acid to sodium alpha-olefin sulfonate is 1-3:1, 2-acrylamido-2-methylpropanesulfonic acid is 1% -3% of the total weight of methacrylic acid and sodium alpha-olefin sulfonate, the total weight of sodium persulfate is 2% -4% of the total weight of methacrylic acid and sodium alpha-olefin sulfonate, and the total weight of deionized water in the reaction is 2-4 times of the total weight of reactants.
3. The concrete gel reducing agent according to claim 1, wherein the reinforcing agent consists of ammonium thiosulfate, ammonium humate and diethanolisopropanolamine in a weight ratio of 5-8:3-5: 1.
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| CN201711110209.3A CN107759122B (en) | 2017-11-12 | 2017-11-12 | Concrete glue reducing agent |
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| CN110386773A (en) * | 2019-06-28 | 2019-10-29 | 浙江老虎山建材有限公司 | A kind of concrete subtracts the preparation method of jelly |
| CN112979210B (en) * | 2021-01-29 | 2022-07-01 | 西安同成建筑科技有限责任公司 | Anti-adsorption concrete glue reducing agent and application thereof |
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| JPH089495B2 (en) * | 1988-04-27 | 1996-01-31 | 住友大阪セメント株式会社 | Cement composition temperature rise suppressing agent and temperature rise suppressing method |
| CN103450412B (en) * | 2013-09-16 | 2016-01-20 | 科之杰新材料集团有限公司 | A kind of preparation method of ester class Early-strength polycarboxylate superplasticizer |
| CN104693840B (en) * | 2013-12-06 | 2016-10-05 | 上海华明高技术（集团）有限公司 | Environment-friendly type nano coloring material aqueous dispersions and preparation method thereof |
| CN104030595B (en) * | 2014-04-30 | 2017-01-25 | 岳阳跃坤环保建材科技有限公司 | Compound concrete admixture with early strength and water reduction functions, and preparation method and application thereof |
| CN104119018A (en) * | 2014-07-10 | 2014-10-29 | 同济大学 | High-collapse-protection type polycarboxylic water reducer prepared by complex formulation of VC (vitamin C) waste mother liquor |
| CN105217990B (en) * | 2015-10-26 | 2017-05-10 | 房立国 | Concrete reinforcing agent and preparation method thereof |
| CN105541163A (en) * | 2015-12-08 | 2016-05-04 | 同济大学 | Cement retarder with tartaric acid by-product and VC waste mother liquor as main materials and use method thereof |
| CN105693131A (en) * | 2016-01-19 | 2016-06-22 | 王金奎 | Addition agent having synergistic effect on cement and preparing method |
| CN106867147A (en) * | 2017-03-12 | 2017-06-20 | 广西丰达三维科技有限公司 | A kind of foamed material and its application |
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