Alkali-free liquid quick-setting agent, preparation method and applications thereof

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

Active Publication Date: 2019-09-20
WUHAN UNIV OF TECH
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  • Abstract
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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

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  • Alkali-free liquid quick-setting agent, preparation method and applications thereof
  • Alkali-free liquid quick-setting agent, preparation method and applications thereof
  • Alkali-free liquid quick-setting agent, preparation method and applications thereof

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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 an alkali-free liquid quick-setting agent, a preparation method and applications thereof, wherein the raw materials comprise, by mass, 45-55% of aluminum sulfate, 5-10% of nanometer alumina, 5-10% of hydrofluoric acid, 3-7% of a solubilizing component, 2-6% of fluorosilicate, 1-4% of an early strength component, 0.5-1% of a stabilizer, and 20-32% of water. According to the present invention, the aluminum sulfate is used as the main raw material, and is matched with the nanometer alumina, the hydrofluoric acid, the solubilizing component, the fluorosilicate, the early strong component and the stabilizer, such that the obtained alkali-free liquid quick-setting agent has characteristics of good setting acceleration effect, long-term stability and low rebound rate, can substantially improve the earth strength of concrete, and can have high strength retention rate in late strength, wherein various performance indexes can meet the requirements on the first-class quick-setting agent in standard JC477-2005 Flash setting admixtures for shotcrete at a dosage of 7%.

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 Applications(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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