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Additive for preparing powdery polycarboxylate superplasticizer and application method thereof

An additive, polycarboxylic acid technology, applied in the field of building materials, can solve the problems of complex manufacturing process, difficult control of reaction heat, poor effect of water reducing agent, etc.

Inactive Publication Date: 2017-01-11
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reaction heat is not easy to control during bulk polymerization, and the molecular diffusion is affected to a certain extent, so the effect of the synthesized water reducer is not good.
[0008] In short, the existing powder polycarboxylate superplasticizer has complex manufacturing process, high energy consumption, and fewer manufacturers with production capacity, resulting in higher product prices

Method used

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  • Additive for preparing powdery polycarboxylate superplasticizer and application method thereof
  • Additive for preparing powdery polycarboxylate superplasticizer and application method thereof
  • Additive for preparing powdery polycarboxylate superplasticizer and application method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: Additive formula 1 and its use method and effect

[0019] 1. Formula 1:

[0020] This additive is composed of A component and B component, A component: 10 parts of calcium oxide, 10 parts of magnesium oxide, 20 parts of calcium aluminate, 10 parts of magnesium chloride; B component: 5 parts of sodium bicarbonate, 50 parts of calcium sulfate , 5 parts of aluminum sulfate.

[0021] 2. How to use:

[0022] a. The polycarboxylate superplasticizer aqueous solution (the esterification product of polyethylene glycol monomethyl ether (MPEG) and maleic anhydride) with a solid content of 40% by mass is a macromonomer, and acrylic acid is a small monomer. The weight average molecular weight is about 12600) (raw material 1) 350 parts into the container, then add 100 parts of the A component of the additive, and stir for 20 minutes, the aqueous solution of polycarboxylate superplasticizer gradually becomes viscous and stable the slurry;

[0023] b. Add 30 parts of ...

Embodiment 2

[0029] Embodiment 2: Additive formula 2 and its use method and effect

[0030] 1. Recipe 2

[0031] This additive is composed of A component and B component, A component: 50 parts of calcium oxide, 40 parts of magnesium oxide, 50 parts of calcium aluminate, 30 parts of magnesium chloride; B component: 15 parts of sodium bicarbonate, 85 parts of calcium sulfate , 15 parts of aluminum sulfate.

[0032] 2. How to use:

[0033] a. Polycarboxylate superplasticizer aqueous solution (methallyl polyether (TPEG) is a large monomer, methacrylic acid and maleic anhydride are small monomers) copolymerized with a solid content of 60% by mass, and the weight average Add 300 parts of molecular weight to about 17200) (raw material 2) into the container, then add 90 parts of component A of the additive, and stir for 60 minutes, the aqueous solution of polycarboxylate superplasticizer gradually becomes a viscous, stable slurry body;

[0034] b. Add 10 parts of component B of the additive to...

Embodiment 3

[0040] Embodiment 3: Additive formula 3 and its use method and effect

[0041] 1. Recipe 3

[0042] This additive is composed of A component and B component, A component: 20 parts of calcium oxide, 30 parts of magnesium oxide, 40 parts of calcium aluminate, 20 parts of magnesium chloride; B component: 10 parts of sodium bicarbonate, 70 parts of calcium sulfate , 10 parts of aluminum sulfate.

[0043] 2. How to use:

[0044] a. Polycarboxylate superplasticizer aqueous solution with a solid content of 50% by mass (allyl polyether (APEG) is a large monomer, acrylic acid is a small monomer, and the weight average molecular weight is about 14800) (raw material 3) Add 320 parts into the container, then add 95 parts of component A of the additive, and stir for 40 minutes, the aqueous solution of the polycarboxylate superplasticizer gradually becomes a viscous, stable slurry;

[0045] b. Add 20 parts of component B of the additive to the slurry, and stir for 35 minutes to dehydrate...

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Abstract

The invention discloses an additive for preparing a powdery polycarboxylate superplasticizer and an application method thereof. The additive is composed of a component A and a component B, wherein the component A comprises 10 to 50 parts of calcium oxide from, 10 to 40 parts of magnesium oxide, 20 to 50 parts of calcium aluminate and 10 to 30 parts of magnesium chloride, and the component B comprises 5 to 15 parts of sodium bicarbonate, 50 to 85 parts of calcium sulfate and 5 to 15 parts of aluminum sulfate. In use, the component A is added into an aqueous solution of a polycarboxylate superplasticizer for curing, and then the component B is added for curing again, so the powdery polycarboxylate superplasticizer is obtained. The additive provided by the invention enables the aqueous solution of the polycarboxylate superplasticizer to be rapidly cured to form powder, and improves the use performance of the powdery polycarboxylate superplasticizer, and has the advantages of simple operation and low cost.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an additive for preparing a powder polycarboxylate water reducer and a method for using the additive. Background technique [0002] Concrete water reducer is a concrete additive added during concrete mixing to improve the workability of freshly mixed concrete, increase the strength and durability of concrete. Concrete water reducers can be divided into lignosulfonates, polycyclic aromatic sulfonates, water-soluble resin sulfonates, polycarboxylic acids, etc. according to their chemical composition. Among them, polycarboxylate water-reducing agent has small dosage, high water-reducing rate, and good cement adaptability. There are no alkali, chlorine, sulfur, formaldehyde, urea and other harmful substances in the product. The production process is mild and there is no three wastes. In recent years, construction has been widely applied. Since the production of polycarboxylate sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/14C04B24/24C04B103/30
Inventor 罗永会高振国韩玉芳
Owner SHIJIAZHUANG TIEDAO UNIV
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