Polycarboxylate superplasticizer and preparation method thereof

A technology of water reducer and polycarboxylic acid, applied in the field of polycarboxylate water reducer and its preparation, to achieve the effect of reducing slump loss

Pending Publication Date: 2022-04-05
HUZHOU GREEN BUILDING MATERIALS DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although this invention has the advantages of reducing energy consumption and greatly saving production costs; but this invention also has the disadvantage that the viscosity of the concrete added to the concrete will affect the working conditions of the concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046]1. Synthetic raw materials: main reagent, main reagent includes acrylic acid, hydroxyethyl acrylate, methallyl polyoxyethylene ether, vitamin C, hydrogen peroxide, and mercaptopropionic acid; retarder, retarder includes phenol, carboxymethyl Chitosan-based; viscosity reducer, viscosity reducer including sodium hexaphosphate.

[0047] 2. Test raw materials: Huaxin cement PO42.5, machine-made sand with a modulus of 2.8, S95 grade slag, continuous grade crushed stone with a particle size of 10~30mm.

[0048] 3. Experimental equipment: HH-1 digital display constant temperature water bath, peristaltic pump of Changzhou Putian Instrument Manufacturing Co., Ltd., YZ15 type, Baoding Ref Fluid Technology Co., Ltd.; electric stirrer, H2010G type, Shanghai Meiyingpu Instrument Manufacturing Co., Ltd. company.

[0049] 4. Synthesis process: Add methallyl polyoxyethylene ether, hydroxyethyl acrylate and distilled water in proportion to the four-neck flask, dissolve completely at 60°...

Embodiment 2

[0052] 1. Synthetic raw materials: main reagent, main reagent includes acrylic acid, hydroxyethyl acrylate, methallyl polyoxyethylene ether, vitamin C, hydrogen peroxide, and mercaptopropionic acid; retarder, retarder includes phenol, carboxymethyl Chitosan-based; viscosity reducer, viscosity reducer including sodium hexaphosphate.

[0053] 2. Test raw materials: Huaxin cement PO42.5, machine-made sand with a modulus of 2.8, S95 grade slag, continuous grade crushed stone with a particle size of 10~30mm.

[0054] 3. Experimental equipment: HH-1 digital display constant temperature water bath, peristaltic pump of Changzhou Putian Instrument Manufacturing Co., Ltd., YZ15 type, Baoding Ref Fluid Technology Co., Ltd.; electric stirrer, H2010G type, Shanghai Meiyingpu Instrument Manufacturing Co., Ltd. company.

[0055] 4. Synthesis process: Add methallyl polyoxyethylene ether, hydroxyethyl acrylate and distilled water in proportion to the four-neck flask, dissolve completely at 60...

Embodiment 3

[0058] 1. Synthetic raw materials: main reagent, main reagent includes acrylic acid, hydroxyethyl acrylate, methallyl polyoxyethylene ether, vitamin C, hydrogen peroxide, and mercaptopropionic acid; retarder, retarder includes phenol, carboxymethyl Chitosan-based; viscosity reducer, viscosity reducer including sodium hexaphosphate.

[0059] 2. Test raw materials: Huaxin cement PO42.5, machine-made sand with a modulus of 2.8, S95 grade slag, continuous grade crushed stone with a particle size of 10~30mm.

[0060] 3. Experimental equipment: HH-1 digital display constant temperature water bath, peristaltic pump of Changzhou Putian Instrument Manufacturing Co., Ltd., YZ15 type, Baoding Ref Fluid Technology Co., Ltd.; electric stirrer, H2010G type, Shanghai Meiyingpu Instrument Manufacturing Co., Ltd. company.

[0061] 4. Synthesis process: Add methallyl polyoxyethylene ether, hydroxyethyl acrylate and distilled water in proportion to the four-neck flask, dissolve completely at 60...

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Abstract

The invention belongs to the technical field of water reducing agents, and particularly relates to a polycarboxylic acid water reducing agent and a preparation method thereof. Through the main body reagent, the retarder used for reducing the setting speed of concrete and the viscosity reducer used for improving the fluidity of the concrete, the technical effect of reducing the water demand and the viscosity of the concrete after the main body reagent, the retarder used for reducing the setting speed of the concrete and the viscosity reducer used for improving the fluidity of the concrete are added is achieved; when a high amount of water reducing agent is added into the concrete, the phenomena of bleeding, segregation and bottom grabbing cannot occur; ca < 2 + > cannot be quickly converted into a coagulation state through hydroxyl and carboxyl, so that the effect of delaying the coagulation time is achieved; phosphorus groups are introduced into the phosphorus compound, so that the electrostatic repulsion between the water reducing agents is enhanced, and the viscosity of the concrete is macroscopically reduced; and phosphate in the phosphorus-containing compound hinders the formation process of calcium hydroxide, hydrated calcium silicate and hydrated calcium aluminosilicate, so that the interference on the setting and hardening process of the concrete is realized, and the retarding effect is also realized.

Description

technical field [0001] The invention belongs to the technical field of water reducers, in particular to a polycarboxylate water reducer and a preparation method thereof. Background technique [0002] Water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete basically unchanged. Most of them belong to anionic surfactants, among which polycarboxylate superplasticizer is a high-performance water reducer and a concrete dispersant in concrete application. It is widely used in highways, bridges, high-rise buildings and other projects, but the higher the strength The greater the viscosity of the concrete, the poorer the fluidity of the concrete, and it is not easy to pump, which will cause more adverse effects on the construction and strength of the concrete. Therefore, a polycarboxylate superplasticizer that can effectively reduce the viscosity of concrete is urgently needed in the market. [0003] The Chinese inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B28/04C04B103/22C04B103/30
Inventor 朱士荣朱丽婷王晓明崔元超吴应福
Owner HUZHOU GREEN BUILDING MATERIALS DEV
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