CN106279558B - concrete additive and preparation method thereof - Google Patents
concrete additive and preparation method thereof Download PDFInfo
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- CN106279558B CN106279558B CN201610583687.5A CN201610583687A CN106279558B CN 106279558 B CN106279558 B CN 106279558B CN 201610583687 A CN201610583687 A CN 201610583687A CN 106279558 B CN106279558 B CN 106279558B
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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
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to one kind for concrete additive and preparation method thereof；Purpose is to provide a kind of concrete additive and preparation method thereof with good water-reducing property and function of slump protection.A kind of concrete additive includes following components by weight percent：32-40 parts of B, 0.1-0.5 parts of monomer of A, 2.2-4 parts of monomer chain-transferring agents, 0.3-0.5 parts of hydrogen peroxide, 0.1-0.3 parts of VC, 45-65 parts of water；The monomer A is the polyethers that molecular weight is 2000-4000；Polyethers as refers to the end alkenyl alkylene polyoxyethylene ether with terminal double bond；The monomer B is acrylic acid；The chain-transferring agent is mercaptopropionic acid.Being added to slump retaining in concrete using concrete additive prepared by inventive formulation will not change over time and substantially reduce, and the carboxylic acid conversion ratio raising of additive is fairly obvious, additive molecule can release carboxylate radical gradually slowly to improve the slump retaining of concrete.
Description
Technical field
The present invention relates to additives of a kind of concrete construction and preparation method thereof, and in particular to a kind of polycarboxylic acids diminishing
Agent and preparation method thereof.
Background technique
Water-reducing agent is one kind under conditions of maintaining concrete slump constant, outside the concrete that can be reduced mixing water amount
Add agent, belongs to anionic surfactant mostly.Polycarboxylate water-reducer (Polycarboxylate Superplasticizer)
It is a kind of high-performance water reducing agent, is one of cement concrete utilization cement dispersants.But polycarboxylate water-reducer is in coagulation
In soil application, as the time increases, the mobility of concrete can reduce, so that therefore lose workability needs in construction usage
Compound the slump retaining agent for being able to maintain concrete flowability.
Summary of the invention
The purpose of the invention is to provide a kind of concrete additive with good water-reducing property and function of slump protection and
Preparation method.
To achieve the above object, the technical solution adopted by the present invention is that：A kind of concrete additive includes following weight group
Point：32-40 parts of B, 0.1-0.5 parts of monomer of A, 2.2-4 parts of monomer chain-transferring agents, 0.3-0.5 parts of hydrogen peroxide, 0.1-0.3 parts of VC,
45-65 parts of water；
The monomer A is the polyethers that molecular weight is 2000-4000；Polyethers as refers to the end alkenyl alkylene with terminal double bond
Polyoxyethylene ether；
The monomer B is acrylic acid；
The chain-transferring agent is mercaptopropionic acid.
VC, that is, vitamin C.
It is further preferred that the concrete additive includes following components by weight percent：32-40 parts A, 2.2-4 parts of monomer single
B, 0.1-0.5 parts of chain-transferring agents of body, 0.3-0.5 parts of hydrogen peroxide, 0.1-0.3 parts of VC, 45-65 parts of water.
It is further preferred that the concrete additive includes following components by weight percent：35 parts of monomer A, 3 parts of monomer B, 0.2
Part chain-transferring agent, 0.4 part of hydrogen peroxide, 0.1 part of VC, 61.3 parts of water.
Further, the polyethers is methyl alkenyl polyoxyethylene ether, isoamyl alcohol polyoxyethylene ether and methallyl alcohol
Mixture in polyoxyethylene ether, mass ratio 4：4：2.
The preparation method of above-mentioned concrete additive includes step：
A. monomer B is soluble in water, stir evenly monomer solution is stand-by；Chain-transferring agent and VC is soluble in water, stirring
It is uniform to obtain chain-transferring agent solution for later use；
B. by monomer A and hydrogen peroxide solution heating stirring 0.6-1.2h, remaining water is then added and is completely dissolved, temperature adds
After heat arrives 38-42 DEG C, then start that monomer solution and chain-transferring agent solution is at the uniform velocity added dropwise, 3-5h is dripped off；
C. continue insulation reaction 1.5-3h, liquid alkaline solution regulation system pH value is added after reaction between 6-8, discharges
Up to product.The liquid alkaline solution used can be sodium hydrate aqueous solution and be also possible to potassium hydroxide aqueous solution.
Further, temperature is heated to 40 DEG C in the step B.
Further, monomer A and hydrogen peroxide solution heating stirring 1h in the step B.
Further, monomer solution and chain-transferring agent solution time for adding are 3.5h in the step B.
Further, the insulation reaction time is 2h in the step C.
Further, water that monomer solution uses is prepared in the step A, prepares water and the step that chain-transferring agent uses
The mass ratio for the water being added in rapid B is 2：1：7.
Using inventive formulation prepare concrete additive be added to slump retaining in concrete will not change over time and
Substantially reduce, and additive carboxylic acid conversion ratio improve it is fairly obvious, additive molecule slowly can gradually release carboxylate radical from
And improve the slump retaining of concrete.
Specific embodiment
The present invention will be further described combined with specific embodiments below.The embodiment is only preferred implementation of the invention
Example, is not intended to restrict the invention, for those skilled in the art, the present invention can have various changes and change
Change.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention
Protection scope within.
Embodiment one
30g acrylic acid is dissolved in 122.6g deionized water, is stirred evenly, minor comonomer solution for later use is obtained；By 2g sulfydryl third
Acid and 1gVC are dissolved in 61.3g deionized water, are stirred evenly, are obtained chain-transferring agent solution for later use；It is by 140g average molecular weight
3000 methyl alkenyl polyoxyethylene ether, the isoamyl alcohol polyoxyethylene ether that 140g average molecular weight is 2400,70g mean molecule
Then 429.1g deionization is added in the methyl allyl alcohol polyoxyethylene ether and 4g hydrogen peroxide solution heating stirring 1.2h that amount is 2400
Water is completely dissolved after temperature reaches 40 DEG C, starts that minor comonomer solution and chain-transferring agent solution is at the uniform velocity added dropwise, and 3.5h is dripped off, then after
Liquid alkaline solution regulation system pH value is added to 6.8 in continuous insulation reaction 2h after reaction, and discharging obtains product.
Embodiment two
40g acrylic acid is dissolved in 130g deionized water, is stirred evenly, minor comonomer solution for later use is obtained；By 1g mercaptopropionic acid
It is dissolved in 65g deionized water, stirs evenly with 3gVC, obtain chain-transferring agent solution for later use；It is 3000 by 100g average molecular weight
Isoamyl alcohol polyoxyethylene ether that methyl alkenyl polyoxyethylene ether, 100g average molecular weight are 2400,120g average molecular weight are
Then it is completely molten that 455g deionized water is added in 2400 methyl allyl alcohol polyoxyethylene ether and 4g hydrogen peroxide solution heating stirring 1h
After solution temperature reaches 40 DEG C, start that minor comonomer solution and chain-transferring agent solution is at the uniform velocity added dropwise, 4h is dripped off, and then proceedes to insulation reaction
Liquid alkaline solution regulation system pH value is added to 7.8 in 3h after reaction, and discharging obtains product.
Embodiment three
22g acrylic acid is dissolved in 120g deionized water, is stirred evenly, minor comonomer solution for later use is obtained；By 5g mercaptopropionic acid
It is dissolved in 100g deionized water, stirs evenly with 1gVC, obtain chain-transferring agent solution for later use；It is 3000 by 160g average molecular weight
Isoamyl alcohol polyoxyethylene ether that methyl alkenyl polyoxyethylene ether, 160g average molecular weight are 2400,80g average molecular weight are
Then it is completely molten that 380g deionized water is added in 2400 methyl allyl alcohol polyoxyethylene ether and 3g hydrogen peroxide solution heating stirring 1h
After solution temperature reaches 40 DEG C, start that minor comonomer solution and chain-transferring agent solution is at the uniform velocity added dropwise, 4h is dripped off, and then proceedes to insulation reaction
Liquid alkaline solution regulation system pH value is added to 6.2 in 3h after reaction, and discharging obtains product.
Product made from embodiment is pressed with commercially available accelerator according to standard JG/T 223-2007《The high property of polycarboxylic-acid
It can water-reducing agent》Test is compared to indexs such as its slumps, the results are shown in Table 1：
1 contrast test result of table
Claims (8)
1. a kind of preparation method of concrete additive, it is characterised in that：Including step：
A. monomer B is soluble in water, stir evenly monomer solution is stand-by；Chain-transferring agent and VC is soluble in water, it stirs evenly
Obtain chain-transferring agent solution for later use；
B. by monomer A and hydrogen peroxide solution heating stirring 0.6-1.2h, remaining water is then added and is completely dissolved, temperature is heated to
After 38-42 DEG C, then start that monomer solution and chain-transferring agent solution is at the uniform velocity added dropwise, 3-5h is dripped off；
C. continue insulation reaction 1.5-3h, liquid alkaline solution regulation system pH value is added after reaction between 6-8, discharges to obtain the final product
Product；
Each group is divided into following parts by weight：32-40 parts of B, 0.1-0.5 parts of monomer of A, 2.2-4 parts of monomer chain-transferring agents, 0.3-0.5 parts
Hydrogen peroxide, 0.1-0.3 part VC, 45-65 part water；
The monomer A is the polyethers that molecular weight is 2000-4000；The polyethers is methyl alkenyl polyoxyethylene ether, prenol
Mixture in polyoxyethylene ether and methyl allyl alcohol polyoxyethylene ether, mass ratio 4：4：2；
The monomer B is acrylic acid；
The chain-transferring agent is mercaptopropionic acid.
2. the preparation method of concrete additive according to claim 1, it is characterised in that：Each group is divided into following weight
Part：35 parts of monomer A, 3 parts of monomer B, 0.2 part of chain-transferring agent, 0.4 part of hydrogen peroxide, 0.1 part of VC, 61.3 parts of water.
3. the preparation method of concrete additive according to claim 1, it is characterised in that：Temperature adds in the step B
Heat is to 40 DEG C.
4. the preparation method of concrete additive according to claim 1, it is characterised in that：In the step B monomer A and
Hydrogen peroxide solution heating stirring 1h.
5. the preparation method of concrete additive according to claim 1, it is characterised in that：Monomer is molten in the step B
Liquid and chain-transferring agent solution time for adding are 3.5h.
6. the preparation method of concrete additive according to claim 1, it is characterised in that：It is kept the temperature in the step C anti-
It is 2h between seasonable.
7. the preparation method of concrete additive according to claim 1, it is characterised in that：It is prepared in the step A single
Water that liquid solution uses, the mass ratio for preparing the water being added in the water and the step B that chain-transferring agent uses are 2：1：7.
8. a kind of concrete additive, it is characterised in that：It is added according to concrete described in any one of claim 1 to 7
The preparation method of agent is prepared.
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| CN201610583687.5A CN106279558B (en) | 2016-07-22 | 2016-07-22 | concrete additive and preparation method thereof |
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| CN201610583687.5A CN106279558B (en) | 2016-07-22 | 2016-07-22 | concrete additive and preparation method thereof |
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| CN106279558A CN106279558A (en) | 2017-01-04 |
| CN106279558B true CN106279558B (en) | 2018-11-30 |
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| CN108298858A (en) * | 2018-02-10 | 2018-07-20 | 四川双利新材料有限公司 | The anhydrous synthetic powder of 100% collapse protective poly-carboxylic acid water reducing agent of one kind and its preparation method |
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| CN103183788B (en) * | 2011-12-27 | 2015-11-18 | 山西黄腾化工有限公司 | The preparation method of polycarboxylic acid concrete slump retaining agent |
| CN102603996B (en) * | 2012-02-28 | 2013-12-25 | 武汉理工大学 | Ether type polycarboxylic acid slump retaining agent and preparation method thereof |
| CN104193915A (en) * | 2014-08-21 | 2014-12-10 | 广东瑞安科技实业有限公司 | Slow-release type polycarboxylic acid slump retaining agent and preparation method thereof |
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Address after: 400 700 Sansheng Town Street, Beibei District, Chongqing Patentee after: CHONGQING SANSHENG INDUSTRIAL CO.,LTD. Address before: 400 000 Sansheng Town Street, Beibei District, Chongqing Patentee before: Chongqing Sansheng Building Materials Co., Ltd. |