CN113667068A - Glue-reducing type polycarboxylate superplasticizer and preparation method thereof - Google Patents
Glue-reducing type polycarboxylate superplasticizer and preparation method thereof Download PDFInfo
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- CN113667068A CN113667068A CN202110900522.7A CN202110900522A CN113667068A CN 113667068 A CN113667068 A CN 113667068A CN 202110900522 A CN202110900522 A CN 202110900522A CN 113667068 A CN113667068 A CN 113667068A
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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
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2688—Copolymers containing at least three different monomers
- C04B24/2694—Copolymers containing at least three different monomers containing polyether side chains
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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
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a glue-reducing polycarboxylic acid water reducing agent and a preparation method thereof, wherein the glue-reducing polycarboxylic acid water reducing agent comprises the following components in parts by weight: 380 parts of prenyl alcohol polyoxyethylene ether macromonomer 340-1500 parts, 46-52 parts of acrylic acid, 3-9 parts of polyoxyethylene-polyoxypropylene segmented copolymer functional monomer, 2-5 parts of thioglycolic acid, 2-6 parts of hydrogen peroxide, 0.5-0.9 part of ascorbic acid and 1500 parts of deionized water 900-1500. The raw materials of the components are mixed according to certain conditions and steps to prepare the water reducing agent with the glue reducing performance, and the water reducing agent can be used as a concrete additive, so that the dosage of cement in the concrete can be greatly reduced on the basis of ensuring various performances of the cement concrete, and the dosage of single cement can be reduced by about 80kg compared with that of the conventional additive by taking C50 concrete as an example.
Description
Technical Field
The invention belongs to the technical field of building materials, relates to a concrete admixture, and particularly relates to a glue-reducing type polycarboxylate superplasticizer and a preparation method thereof.
Background
The current building field is developed rapidly, and the demand of cement concrete is huge. As is well known, the production of cement needs to exploit mineral resources such as limestone, sandstone and the like, is not beneficial to environmental protection, and has prominent contradiction between development and protection. On the premise of ensuring the development, the consumption of the cement concrete is reduced, and the method has great significance for environmental protection.
Disclosure of Invention
The invention aims to provide a concrete admixture, which reduces the using amount of single-component concrete cement on the basis of ensuring various performances of concrete and makes a contribution to solving the contradiction between the development of the current construction industry and the environmental protection.
The polycarboxylate superplasticizer is a common additive in concrete construction. According to the technical specification of concrete admixture application (GB 50119 and 2013), the conventional polycarboxylic acid high-performance water reducing agent is generally divided into a standard type, an early-strength type and a retarding type according to the performance. The polycarboxylic acid has the characteristic of molecular designability, and the characteristic endows the polycarboxylic acid with diversity and derivation of molecular structure, in other words, active large monomers and small monomers with different functions are synthesized according to a certain formula and a certain process, and then the polycarboxylic acid can be polymerized into a polycarboxylic acid product with a certain special function.
According to the characteristics of the polycarboxylic acid, the applicant synthesizes a polycarboxylic acid product with the gel reducing performance by adopting isopentenol polyoxyethylene ether, polyoxyethylene-polyoxypropylene block copolymer, acrylic acid, thioglycolic acid, hydrogen peroxide, ascorbic acid and sodium hydroxide as raw materials and adjusting the proportion and reaction conditions of the raw materials through repeated tests, and the technical scheme is as follows:
the glue-reducing type polycarboxylate superplasticizer is characterized by comprising the following components in parts by weight: 380 parts of prenyl alcohol polyoxyethylene ether macromonomer 340-1500 parts, 46-52 parts of acrylic acid, 3-9 parts of polyoxyethylene-polyoxypropylene segmented copolymer functional monomer, 2-5 parts of thioglycolic acid, 2-6 parts of hydrogen peroxide, 0.5-0.9 part of ascorbic acid and 1500 parts of deionized water 900-1500.
The preparation method of the glue-reducing type polycarboxylate superplasticizer comprises the following steps:
(1) preparing raw materials in parts by weight: 380 parts of isopentenol polyoxyethylene ether macromonomer 340; 46-52 parts of acrylic acid; 3-9 parts of polyoxyethylene-polyoxypropylene segmented copolymer functional monomer; 2-5 parts of thioglycollic acid; 2-6 parts of hydrogen peroxide; 0.5-0.9 part of ascorbic acid; 1500 portions of deionized water were added in 900 portions and divided into 3 equal portions.
(2) Preparing acrylic acid, polyoxyethylene-polyoxypropylene block copolymer and 1 equal part of deionized water into solution A;
(3) preparing mercaptoacetic acid, ascorbic acid and 1 equal part of deionized water into solution B;
(4) heating an isopentenol polyoxyethylene ether macromonomer and 1 equal part of deionized water in a reaction kettle at 40 ℃ until the macromonomer and the deionized water are completely dissolved to prepare solution C;
(5) adding hydrogen peroxide into the solution C, stirring for 5 minutes, and then simultaneously dropwise adding the solution A and the solution B for 3 hours;
(6) after the dropwise addition, the reaction is carried out for 1 hour at the temperature of 40 ℃;
(7) cooling to room temperature, and adding alkali to neutralize to pH 6-7.
The invention can greatly reduce the dosage of cementing materials (the sum of cement and mineral admixtures) in the cement concrete on the basis of ensuring various performances of the cement concrete, takes C50 concrete as an example, the dosage of single cement can be reduced by about 80kg, and the invention has important significance in reducing mineral exploitation and environmental protection.
Detailed Description
The invention provides a glue-reducing polycarboxylic acid water reducing agent which comprises the following components in parts by weight: 380 parts of prenyl alcohol polyoxyethylene ether macromonomer 340-1500 parts, 46-52 parts of acrylic acid, 3-9 parts of polyoxyethylene-polyoxypropylene segmented copolymer functional monomer, 2-5 parts of thioglycolic acid, 2-6 parts of hydrogen peroxide, 0.5-0.9 part of ascorbic acid and 1500 parts of deionized water 900-1500.
The preparation method of the glue-reducing polycarboxylic acid water reducer comprises the following steps:
example 1:
(1) preparing the following raw materials in parts by weight: 340 parts of prenyl alcohol polyoxyethylene ether TPEG2400 macromonomer, 46 parts of acrylic acid, 3 parts of polyoxyethylene-polyoxypropylene block copolymer AP7000 functional monomer, 2 parts of thioglycolic acid, 2 parts of hydrogen peroxide, 0.5 part of ascorbic acid and 900 parts of deionized water.
(2) Preparing a solution A from 46 parts of acrylic acid, 3 parts of a polyoxyethylene-polyoxypropylene block copolymer AP7000 functional monomer and 300 parts of deionized water;
(3) preparing 2 parts of thioglycolic acid, 0.5 part of ascorbic acid and 300 parts of deionized water into solution B;
(4) heating 340 parts of prenyl polyoxyethylene ether TPEG2400 macromonomer and 300 parts of deionized water in a reaction kettle at 40 ℃ until the prenyl polyoxyethylene ether TPEG is completely dissolved to prepare solution C;
(5) adding 2 parts of hydrogen peroxide into the solution C, stirring for 5 minutes, and then simultaneously dropwise adding the solution A and the solution B for 3 hours;
(6) after the dropwise addition, the reaction is carried out for 1 hour at the temperature of 40 ℃;
(7) cooling to room temperature, and adding alkali to neutralize to pH 6-7.
Example 2:
(1) preparing the following raw materials in parts by weight: 360 parts of prenyl alcohol polyoxyethylene ether TPEG2400 macromonomer, 49 parts of acrylic acid, 6 parts of polyoxyethylene-polyoxypropylene block copolymer AP7000 functional monomer, 3.5 parts of thioglycolic acid, 4 parts of hydrogen peroxide, 0.7 part of ascorbic acid and 1200 parts of deionized water.
(2) Preparing 49 parts of acrylic acid, 6 parts of polyoxyethylene-polyoxypropylene segmented copolymer AP7000 and 400 parts of deionized water into solution A;
(3) preparing solution B from 3.5 parts of thioglycolic acid, 0.7 part of ascorbic acid and 400 parts of deionized water;
(4) heating 360 parts of prenyl polyoxyethylene ether TPEG2400 macromonomer and 400 parts of deionized water in a reaction kettle at 40 ℃ until the monomers are completely dissolved to prepare solution C;
(5) adding 4 parts of hydrogen peroxide into the solution C, stirring for 5 minutes, and then simultaneously dropwise adding the solution A and the solution B for 3 hours;
(6) after the dropwise addition, the reaction is carried out for 1 hour at the temperature of 40 ℃;
(7) cooling to room temperature, and adding alkali to neutralize to pH 6-7.
Example 3:
(1) preparing the following raw materials in parts by weight: 380 parts of prenyl alcohol polyoxyethylene ether TPEG2400 macromonomer, 52 parts of acrylic acid, 9 parts of polyoxyethylene-polyoxypropylene block copolymer AP7000 functional monomer, 5 parts of thioglycolic acid, 6 parts of hydrogen peroxide, 0.9 part of ascorbic acid and 1500 parts of deionized water.
(2) Preparing 52 parts of acrylic acid, 9 parts of polyoxyethylene-polyoxypropylene segmented copolymer AP7000 and 500 parts of deionized water into solution A;
(3) preparing 5 parts of thioglycolic acid, 0.9 part of ascorbic acid and 500 parts of deionized water into solution B;
(4) heating 380 parts of prenyl polyoxyethylene ether TPEG2400 macromonomer and 500 parts of deionized water in a reaction kettle at 40 ℃ until the prenyl polyoxyethylene ether TPEG is completely dissolved to prepare solution C;
(5) adding 5 parts of hydrogen peroxide into the solution C, stirring for 5 minutes, and then simultaneously dropwise adding the solution A and the solution B for 3 hours;
(6) after the dropwise addition, the reaction is carried out for 1 hour at the temperature of 40 ℃;
(7) cooling to room temperature, and adding alkali to neutralize to pH 6-7.
The glue-reducing polycarboxylic acid water reducing agent prepared by the embodiment is used as a concrete admixture, taking C50 cement concrete as an example, and comprises the following components in parts by weight:
cement (p.o42.5), sand: the gravel with the particle size of 5-10mm, the gravel with the particle size of 10-20mm, water and the glue-reducing polycarboxylic acid water reducing agent are 400:826:438:657:128: 4.8.
The main performance indexes of the concrete are compared with the test results of the commonly used concrete admixture (Kejie) sold in the market at present
Table 1:
TABLE 1 concrete test results
It can be seen that the working performance of the C50 concrete mixture using the admixture and the mechanical property of the hardened concrete are superior to those of the conventional product (Kejie), and the 7-day compressive strength is 23.1-25.5 MPa higher than the Kejie. According to the conventional single cement dosage of C50 concrete 480Kg, the single cement dosage of the invention is 400Kg, and each side of C50 concrete can save cement 80 Kg.
Claims (5)
1. The glue-reducing type polycarboxylate superplasticizer is characterized by comprising the following components in parts by weight: 380 parts of prenyl alcohol polyoxyethylene ether macromonomer 340-1500 parts, 46-52 parts of acrylic acid, 3-9 parts of polyoxyethylene-polyoxypropylene segmented copolymer functional monomer, 2-5 parts of thioglycolic acid, 2-6 parts of hydrogen peroxide, 0.5-0.9 part of ascorbic acid and 1500 parts of deionized water 900-1500.
2. The glue-reducing type polycarboxylate superplasticizer according to claim 1, characterized by comprising the following components in parts by weight: 340 parts of prenyl alcohol polyoxyethylene ether macromonomer, 46 parts of acrylic acid, 3 parts of polyoxyethylene-polyoxypropylene segmented copolymer functional monomer, 2 parts of thioglycollic acid, 2 parts of hydrogen peroxide, 0.5 part of ascorbic acid and 900 parts of deionized water.
3. The glue-reducing type polycarboxylate superplasticizer according to claim 1, characterized by comprising the following components in parts by weight: 360 parts of prenyl alcohol polyoxyethylene ether macromonomer, 49 parts of acrylic acid, 6 parts of polyoxyethylene-polyoxypropylene segmented copolymer functional monomer, 3.5 parts of thioglycollic acid, 4 parts of hydrogen peroxide, 0.7 part of ascorbic acid and 1200 parts of deionized water.
4. The glue-reducing type polycarboxylate superplasticizer according to claim 1, characterized by comprising the following components in parts by weight: 380 parts of prenyl alcohol polyoxyethylene ether macromonomer, 52 parts of acrylic acid, 9 parts of polyoxyethylene-polyoxypropylene block copolymer functional monomer, 5 parts of thioglycollic acid, 6 parts of hydrogen peroxide, 0.9 part of ascorbic acid and 1500 parts of deionized water.
5. The preparation method of the glue-reducing type polycarboxylate superplasticizer according to claim 1 is characterized by comprising the following steps:
(1) preparing raw materials in parts by weight: 380 parts of isopentenol polyoxyethylene ether macromonomer 340; 46-52 parts of acrylic acid; 3-9 parts of polyoxyethylene-polyoxypropylene segmented copolymer functional monomer; 2-5 parts of thioglycollic acid; 2-6 parts of hydrogen peroxide; 0.5-0.9 part of ascorbic acid; 1500 portions of deionized water were added in 900 portions and divided into 3 equal portions.
(2) Preparing acrylic acid, polyoxyethylene-polyoxypropylene block copolymer and 1 equal part of deionized water into solution A;
(3) preparing mercaptoacetic acid, ascorbic acid and 1 equal part of deionized water into solution B;
(4) heating an isopentenol polyoxyethylene ether macromonomer and 1 equal part of deionized water in a reaction kettle at 40 ℃ until the macromonomer and the deionized water are completely dissolved to prepare solution C;
(5) adding hydrogen peroxide into the solution C, stirring for 5 minutes, and then simultaneously dropwise adding the solution A and the solution B for 3 hours;
(6) after the dropwise addition, the reaction is carried out for 1 hour at the temperature of 40 ℃;
(7) cooling to room temperature, and adding alkali to neutralize to pH 6-7.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114573766A (en) * | 2022-03-28 | 2022-06-03 | 湖南凝英新材料科技有限公司 | Preparation method of glue-reducing concrete water reducing agent and water reducing agent |
| CN116751017A (en) * | 2023-08-10 | 2023-09-15 | 中交路桥建设有限公司 | Glue-reducing water-reducing concrete and production system thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016614A (en) * | 2014-06-13 | 2014-09-03 | 石家庄市长安育才建材有限公司 | Polycarboxylate water reducer with defoaming function and preparation method of water reducer |
| CN104692699A (en) * | 2015-02-05 | 2015-06-10 | 石家庄市长安育才建材有限公司 | Early strength type ether polycarboxylate superplasticizer and preparation method thereof |
-
2021
- 2021-08-06 CN CN202110900522.7A patent/CN113667068A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016614A (en) * | 2014-06-13 | 2014-09-03 | 石家庄市长安育才建材有限公司 | Polycarboxylate water reducer with defoaming function and preparation method of water reducer |
| CN104692699A (en) * | 2015-02-05 | 2015-06-10 | 石家庄市长安育才建材有限公司 | Early strength type ether polycarboxylate superplasticizer and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114573766A (en) * | 2022-03-28 | 2022-06-03 | 湖南凝英新材料科技有限公司 | Preparation method of glue-reducing concrete water reducing agent and water reducing agent |
| CN116751017A (en) * | 2023-08-10 | 2023-09-15 | 中交路桥建设有限公司 | Glue-reducing water-reducing concrete and production system thereof |
| CN116751017B (en) * | 2023-08-10 | 2023-11-24 | 中交路桥建设有限公司 | Glue-reducing water-reducing concrete and production system thereof |
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