Liquid accelerated agent for sprayed concrete and preparation method of liquid accelerated agent

A technology of sprayed concrete and quick-setting agent, which is applied in the field of concrete admixture and admixture, which can solve the problems of poor application effect and achieve the effects of improving early strength, improving cement adaptability and shortening setting time

Active Publication Date: 2017-05-10
JIANGSU SOBUTE NEW MATERIALS +1
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  • Claims
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Problems solved by technology

[0006] Aiming at the problem that the existing aluminate liquid quick-setting agent has poor application effect in ready-mixed concrete, the presen

Method used

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  • Liquid accelerated agent for sprayed concrete and preparation method of liquid accelerated agent
  • Liquid accelerated agent for sprayed concrete and preparation method of liquid accelerated agent
  • Liquid accelerated agent for sprayed concrete and preparation method of liquid accelerated agent

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preparation example Construction

[0023] Step 1. Preparation of sodium aluminate solution

[0024] Prepare sodium aluminate solution according to the raw materials and process parameters shown in the table below. The preparation method is as follows: first dissolve sodium hydroxide into water, then add aluminum hydroxide to the sodium hydroxide solution under heating conditions, and stir the reaction until hydrogen Aluminum oxide dissolves completely.

[0025] Table 1 Sodium aluminate solution

[0026] Numbering Alkali aluminum molar ratio Alumina concentration temperature reflex reaction time / h A-1 1.50 20.0％ 100℃ 3.0 A-2 1.37 26.5％ 95℃ 3.2 A-3 1.2 30.0％ 90℃ 5.0

[0027] Step 2. Preparation of Modifier Solution

[0028] The modifier solution was prepared according to the raw materials and process parameters shown in the table below. The preparation method is to firstly dissolve sodium hydroxide into water, then add sodium silicate under heating condition and sti...

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Abstract

The invention discloses a liquid accelerated agent for sprayed concrete and a preparation method of the liquid accelerated agent. The liquid accelerated agent for the sprayed concrete uses aluminate as a main component and is compounded with silicate, sulfate, amphoteric metal ions, polyatomic alcohol and alcohol amine. The preparation method of the liquid accelerated agent for the sprayed concrete comprises the following steps: firstly, preparing a sodium aluminate solution from aluminum hydroxide and a sodium hydroxide solution; secondly, dissolving sodium silicate into the sodium hydroxide solution, and adding zinc oxide, sodium thiosulfate and potassium chromate to obtain a modifier solution; finally, compounding the two solutions with the polyatomic alcohol and the alcohol amine to obtain the liquid accelerated agent. According to the liquid accelerated agent for the sprayed concrete, disclosed by the invention, the coagulation time of the sprayed concrete can be further shortened, and the adaptability of cement is improved; the liquid accelerated agent has a good coagulation accelerating effect on initially-hydrated premixed concrete, the coagulation time of the concrete can be remarkably shortened, and the early strength is improved.

Description

technical field [0001] The invention relates to an admixture for wet shotcrete construction, in particular to a liquid quick-setting agent for shotcrete and a preparation method thereof, belonging to the field of concrete admixtures. Background technique [0002] Shotcrete has many advantages in underground construction and rock support, and has become a very important and necessary measure in modern underground engineering. Accelerator is an important chemical admixture in shotcrete construction. Its important role is to accelerate the setting of concrete mixture, reduce the rebound of shotcrete and increase the thickness of the sprayed layer, and at the same time accelerate the early strength development of concrete and provide support for rock in time. protect. [0003] The existing research results show that the quick-setting agent mainly reacts with the sulfate in the liquid phase of the cement hydration stage to eliminate its retarding effect on the cement, and then q...

Claims

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Application Information

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IPC IPC(8): C04B24/12C04B103/12
CPCC04B40/0039C04B2103/12C04B22/0093C04B22/08C04B22/147C04B24/02C04B24/122C04B22/06C04B22/087
Inventor 张建纲冉千平杨勇王伟赵爽
Owner JIANGSU SOBUTE NEW MATERIALS
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