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

A quick-setting agent and liquid technology, which is applied in the field of building material admixtures, can solve the problems of large fluctuations in product quality, high viscosity of the quick-setting agent, and poor stability, and achieve reduced transportation and use costs, low dosage, and good stability Effect

Active Publication Date: 2022-03-18
JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to improve the technical deficiencies of the existing products and develop a liquid alkali-free quick-setting agent and its preparation method, which is used to solve the problem of high viscosity, poor stability, easy delamination and large fluctuations in product quality of the existing suspension system quick-setting agent. And other issues

Method used

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

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Effect test

Embodiment 1

[0033] The preparation steps are as follows:

[0034] (1) First, 43.7wt% water and 5wt% triethanolamine are added to the reaction kettle at a constant temperature of 50°C for stirring;

[0035] (2) Add 0.2wt% modified suspending agent (magnesium aluminum silicate), and keep stirring for 2 hours until completely dispersed;

[0036] (3) Add 45wt% aluminum sulfate and 5wt% magnesium sulfate successively, and keep stirring for 3h until completely dispersed;

[0037] (4) Add 0.1wt% polyaspartic acid and stir for 30min;

[0038] (5) Finally, add 1wt% formic acid and stir for 12 minutes to obtain the low-viscosity, high-performance liquid alkali-free accelerator.

Embodiment 2

[0040] The preparation steps are as follows:

[0041] (1) firstly add 34.5wt% water and 8wt% diethanolamine into the reactor and stir at a constant temperature of 50°C;

[0042] (2) Add 0.4wt% modified suspending agent (attapulgite), and keep stirring for 1h until completely dispersed;

[0043] (3) Add 50wt% aluminum sulfate and 5wt% magnesium sulfate successively, and keep stirring for 3h until completely dispersed;

[0044] (4) Add 0.1wt% polyaspartic acid and stir for 30min;

[0045] (5) Finally, add 2wt% nitric acid and stir for 12 minutes to obtain the low-viscosity, high-performance liquid alkali-free accelerator.

Embodiment 3

[0047] The preparation steps are as follows:

[0048] (1) Add 32.4wt% water and 5wt% diethylenetriamine into the reaction kettle at a constant temperature of 55°C for stirring;

[0049] (2) Add 0.4wt% modified suspending agent (montmorillonite powder), and keep stirring for 3h;

[0050] (3) Add 55wt% aluminum sulfate and 5wt% magnesium sulfate in turn, and continue stirring for 3h until completely dispersed;

[0051] (4) Add 0.2wt% polyaspartic acid and stir for 30min;

[0052] (5) Finally, 2wt% formic acid was added and stirred for 18 minutes to obtain a liquid alkali-free quick-setting agent.

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Abstract

The invention discloses a liquid alkali-free quick-setting agent and a preparation method thereof. The raw material mass percentage of the quick-setting agent is composed as follows: aluminum sulfate (45-70wt%), magnesium sulfate (2-10wt%), organic amine (5-70wt%) 10wt%), modified suspending agent (0.2-0.6wt%), pH regulator (1-3wt%), viscosity reducer (0.1-0.5wt%), and the rest is water. The alkali-free quick-setting agent prepared by the invention can be used in wet shotcrete construction, and has the advantages of short setting time, high early strength, low liquid viscosity and the like. When the dosage is 4%, it can meet the technical requirements, and can be widely used in the support and repair of tunnels, highways, railways, subways, etc.

Description

technical field [0001] The invention belongs to the technical field of building material admixtures, and relates to an accelerator for shotcrete, in particular to a low-viscosity suspension type liquid alkali-free accelerator and a preparation method thereof. Background technique [0002] Concrete constructed by spraying method becomes shotcrete. Shotcrete has many advantages that cannot be compared with ordinary formwork concrete, especially in the anchor shotcrete support of various underground projects, and has become a very important and necessary in modern underground projects. measure. Mainly used in tunnels, shafts, slope protection and other engineering anchor shotcrete support, plugging and emergency repair process. [0003] Accelerator is an admixture that adjusts the setting and hardening rate of concrete (or mortar). It can accelerate the hydration of cement and significantly shorten the setting time. It is used for shotcrete construction. The main function of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/28C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B22/142C04B24/122C04B22/08C04B24/28C04B24/04C04B22/082C04B22/085
Inventor 王靖淳钱珊珊甘杰忠赵旭彭荩影姜海东郑春扬
Owner JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD
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