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A kind of alkali-free liquid quick-setting agent and its preparation method and application

A technology of accelerator and liquid, which is applied in the field of non-alkali liquid accelerator and its preparation, can solve the problems of poor stability, large rebound of alkali-free liquid accelerator, high preparation cost, etc., and achieve low long-term stability, Good coagulation-accelerating effect and low preparation cost

Active Publication Date: 2021-09-21
WUHAN UNIV OF TECH
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Problems solved by technology

[0004] In view of this, the present invention aims to propose a non-alkali liquid quick-setting agent to solve the problems of the existing non-alkali liquid quick-setting agent such as large rebound, poor stability and high preparation cost

Method used

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  • A kind of alkali-free liquid quick-setting agent and its preparation method and application
  • A kind of alkali-free liquid quick-setting agent and its preparation method and application
  • A kind of alkali-free liquid quick-setting agent and its preparation method and application

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Embodiment Construction

[0021] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0022] The present invention will be described in detail below in conjunction with examples.

[0023] Table 1 shows the ratio of each component in the non-alkali liquid quick-setting agent of Examples 1 to 9 of the present invention. Table 2 shows the compositions of solubilizing components, fluorosilicates and early strength components in Examples 1 to 9 of the present invention. Table 3 shows the performance parameters of aluminum sulfate, nano-alumina and stabilizing components in Examples 1 to 9 of the present invention. Among them, the nano-alumina is derived from industrial alumina, and the content of nano-alumina in the industrial alumina is not less than 15.8%, and the nano-alumina is γ-type alumina; the stabilizing component is anionic polyacrylamide.

[0024] Table 1

[0025]

[0026] Table 2...

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Abstract

The invention provides a non-alkali liquid quick-setting agent and its preparation method and application. In terms of mass percentage, the raw materials of the non-alkali liquid quick-setting agent include the following components: aluminum sulfate: 45% to 55%, nano-alumina: 5%~10%, hydrofluoric acid: 5%~10%, solubilizing component: 3%~7%, fluorosilicate: 2%~6%, early strength component: 1%~4%, stable Components: 0.5-1%, water: 20-32%. The alkali-free liquid quick-setting agent of the present invention uses aluminum sulfate as the main raw material, and is equipped with nano-alumina, hydrofluoric acid, solubilizing components, fluorosilicates, early-strength components, and stabilizing components, so that it has good Accelerating effect, long-term stability and low rebound rate. At 7% dosage, all performances have reached the standard JC477-2005 "Accelerators for Shotcrete" for first-class accelerators Requirements, and the non-alkali liquid quick-setting agent of the present invention can greatly improve the early strength of concrete, and can make the later strength have a higher strength retention rate.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to an alkali-free liquid quick-setting agent and its preparation method and application. Background technique [0002] Since the beginning of the new century, infrastructure construction has been vigorously carried out. With the construction of railways, highways, urban rail transit and other transportation facilities, the demand for shotcrete in a large number of engineering constructions has gradually increased. As a special concrete construction method with special functions, shotcrete is widely used in tunnel construction and mine reinforcement. Therefore, higher requirements are put forward for the performance of shotcrete accelerator. As an important component that can accelerate the hydration of cement and reduce the rebound of shotcrete, the accelerator has an important influence on the construction of shotcrete. Adding alkali-free liquid quick-setting agent to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/26C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B14/303C04B22/126C04B24/122C04B24/126C04B24/2652C04B24/04
Inventor 谭洪波顾本庆邓秀峰张迅贺行洋苏英
Owner WUHAN UNIV OF TECH
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