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High performance water reducing agent in new type comb shaped molecular structure

A technology of molecular structure and water reducing agent, applied in the field of building materials, can solve problems such as high cost and complex process, and achieve the effects of easy control, good production reproducibility and easy structure

Active Publication Date: 2007-10-10
CCCC WUHAN HARBOR ENG DESIGN & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the complex process and high cost require people to design larger other types of comb-shaped superplasticizers

Method used

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  • High performance water reducing agent in new type comb shaped molecular structure
  • High performance water reducing agent in new type comb shaped molecular structure
  • High performance water reducing agent in new type comb shaped molecular structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: 11.00mol of water was added to the reactor, 0.44mol of phenol, 0.75mol of sodium p-aminobenzenesulfonate, modified polyether [HO-C 6 h 4 -(OCH 2 CH 2 )10-OH] 0.56mol, the temperature was raised to 80°C, and 0.80mol of 37% formaldehyde was slowly added dropwise in 2 hours. Then the temperature was raised to 95 degrees, and the reaction was carried out for 6 hours. Cool down, adjust the pH value of the solution, adjust the solid content to 27%, filter and pack to obtain the liquid water reducing agent.

[0038] test:

[0039] Concrete test: Refer to GBJ8076-97 "Test Method for Ordinary Concrete Mixture". After adding a certain water reducing agent, reduce the corresponding water consumption, and keep the slump of the concrete mixed with the water reducing agent and the blank concrete the same (80±10mm), calculate the corresponding water reducing rate and test the workability of the concrete; Refer to GBJ107-87 "Concrete Strength Inspection and Evaluation ...

Embodiment 2

[0042] Example 2: Add 11.00mol of water, 0.32mol of phenol, 1.43mol of sodium p-aminobenzenesulfonate, modified polyether [HN-C 6 h 4 -(OCH 2 CH 2 )15-OH] 0.86mol, warming up to 95 degrees, slowly dripping 37% formaldehyde 0.86mol in 1.5 hours, and then keeping warm for 5 hours, cooling to normal temperature, adjusting the pH value, adjusting the solid content to 27%, and filtering and packaging. Can. Test: same as embodiment one

[0043]

Embodiment 3

[0044] Example 3: Add 44.44mol of water and 1.00mol of p-aminobenzenesulfonic acid into the reaction kettle, then add sodium hydroxide to adjust the pH value to 7-8, add 1.04mol of phenol, modify the polyether [HN-C 6 h 4 -(OCH 2 CH 2 ) 20 -OH] 0.88mol, heat up to 75°C, slowly add 37% formaldehyde 4.94mol dropwise within 2 hours, and keep warm for 8 hours. Cool, adjust the solid content to 27%, filter and pack.

[0045] Test: same as embodiment one

[0046] make up

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Abstract

This invention relates to a method for preparing high-performance aminosulfonic acid-series water reducer with polyether-grafted comb-like molecular structure for cement. The high-performance aminosulfonic acid-series water reducer is prepared from: p-aminobenzenesulfonic acid 100 parts, NaOH 115-140 parts, phenol 10-100 parts, modified polyether 0-90 parts, formaldehyde 300-600 parts, and water 3000-10000 parts. The method comprises: dissolving p-aminobenzenesulfonic acid, NaOH, phenol and modified polyether in water at 5-50 deg.C, heating to 50-120 deg.C, dropping formaldehyde, and keeping the temperature for 1-9 h. The high-performance aminosulfonic acid-series water reducer can effectively inhibit the collapse loss of concrete. The high-performance aminosulfonic acid-series water reducer has high workability, and water cannot infiltrate into concrete containing it.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a novel comb-shaped (or comb-shaped) molecular structure sulfamate high-performance water reducer for construction and a preparation method thereof. Background technique [0002] High-performance water reducer, also known as superplasticizer, is used in concrete mixtures and mainly plays three different roles: ① To improve the pouring performance of concrete, improve the workability of concrete without changing the concrete components . ② Under the condition of given workability, reduce the water-cement ratio of mixing water and concrete, and improve the strength and durability of concrete. ③ Under the condition of ensuring the performance and strength of concrete pouring, reduce the amount of water and cement, and reduce the factors of initial defects of concrete caused by creep, dry shrinkage, heat of hydration of cement, etc. [0003] Common cement dis...

Claims

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Application Information

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IPC IPC(8): C04B24/16C04B103/30
CPCC04B40/0039
Inventor 奚强朱本伟邝生鲁王冲赵红梅张宏桥
Owner CCCC WUHAN HARBOR ENG DESIGN & RES
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