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Quick-setting high-strength alkali-free liquid accelerator

A kind of quick-setting agent and strong technology, which is applied in the field of cement-based building materials admixtures to achieve the effects of increasing stability, improving cohesion and cohesion, and good permeability.

Active Publication Date: 2020-09-11
CNBM ZHONGYAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The non-alkali liquid quick-setting agent is developing rapidly, and its quick-setting mechanism is roughly the same. With the continuous application of engineering construction, there are still non-alkali liquid quick-setting agents with low early strength in the prior art and both fast-setting and high-strength types. The agent is widely demanded, and the development of a new fast-setting high-strength alkali-free liquid accelerator has high economic value and social benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Alkali-free liquid quick-setting agent, the raw materials are composed of 45 parts of aluminum sulfate, 21 parts of hydrofluoric acid, 5 parts of aluminum hydroxide, 3 parts of pre-dispersion strengthening components, 5 parts of calcium fluorosilicate, 3 parts of monoisopropanolamine, 4 parts of diethanolamine, 3 parts of oxalic acid, 11 parts of water, initial setting time 1:25, final setting time 2:45, 1d compressive strength 17.6MPa.

Embodiment 2

[0026] Alkali-free liquid quick-setting agent, the raw material composition is 40 parts of aluminum sulfate, 25 parts of hydrofluoric acid, 6 parts of aluminum hydroxide, 5 parts of pre-dispersion strengthening components, 7 parts of magnesium fluorosilicate, 4 parts of triethanolamine, 4 parts of diethanolamine parts, 4 parts of oxalic acid, 5 parts of water, initial setting time 1:10, final setting time 2:40, 1d compressive strength 18.6MPa.

Embodiment 3

[0028] Alkali-free liquid quick-setting agent, the raw materials are composed of 35 parts of aluminum sulfate, 30 parts of hydrofluoric acid, 7 parts of aluminum hydroxide, 5 parts of pre-dispersed reinforcing components, 7 parts of hydroxyethyl methylcellulose, 4 parts of triethanolamine, Diethanolamine 4 parts, oxalic acid 3 parts, water 2 parts, initial setting time 2:24, final setting time 4:22, 1d compressive strength 16.3MPa.

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PUM

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Abstract

The invention relates to a quick-setting high-strength alkali-free liquid accelerator. Raw materials comprise aluminum sulfate, hydrofluoric acid, aluminum hydroxide, a pre-dispersion reinforcing component, a suspension component, a complexing component, organic acid and water. The accelerator has great adaptability on cement-based materials and dual technical effects of quick setting and high strength are achieved, and the sprayed concrete applying the cement-based material is high in setting speed, high in early strength, low in rebound rate, small in dust amount, good in bonding effect, environmentally friendly and free of corrosion.

Description

technical field [0001] The invention relates to the technical field of cement-based building material admixtures, in particular to a fast-setting high-strength alkali-free liquid accelerator and a preparation method thereof, which are suitable for fast-setting repair materials, shotcrete and other cement-based materials. Background technique [0002] With the continuous advancement of my country's infrastructure construction and urban construction projects, quick-setting concrete materials such as fast-setting repair materials and shotcrete play an increasingly important role in engineering, especially for shotcrete, high-speed railways and highways. There are more and more tunnel projects involved in the construction process, and the application of shotcrete to support the lining due to its incomparable superiority is constantly increasing, so higher requirements are put forward for the mechanical properties and durability of shotcrete . [0003] Shotcrete is divided into dr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/40C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B22/122C04B22/126C04B22/06C04B24/122C04B24/04C04B24/16C04B24/124C04B24/02C04B24/06C04B24/003C04B24/405
Inventor 李晓宁闫超强郝利国李婷陈梦龙武斌马加营仲从春马强
Owner CNBM ZHONGYAN TECH
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