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Low-resilience and low-alkaline liquid accelerator for sprayed concrete and preparation method thereof

A technology of sprayed concrete and quick-setting agent, which is applied in the preparation of said liquid quick-setting agent, concrete admixture, and the field of low-resilience and low-alkali liquid quick-setting agent for shotcrete, and can solve the problems such as no guidance scheme is given, Achieve the effects of short setting time, low alkalinity and strong adaptability

Active Publication Date: 2014-12-10
刘翠芬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above technologies have not given specific guidance on how to make the liquid quick-setting agent and cement have strong adaptability and effectively reduce the amount of rebound and dust in shotcrete construction.

Method used

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  • Low-resilience and low-alkaline liquid accelerator for sprayed concrete and preparation method thereof

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Embodiment 1

[0019]Embodiment 1: (low rebound and low alkali for shotcrete) liquid quick-setting agent of the present invention is made by the raw material of following component and mass ratio: aluminate mother liquor, modifier, alcohol amine, stabilizer agent. Wherein, the mass ratio of modifier and aluminate mother liquor is 1:2.5, the mass fraction of aluminate mother liquor is 100 parts in the present embodiment, the mass fraction of modifier is 40 parts, the mass fraction of alkanolamine The number of parts is 2.8 parts, and the number of parts by mass of the stabilizer is 2.1 parts. The dosage of alcohol amine is 2.0% of the sum of the mass of the modifier and the aluminate mother liquor, and the dosage of the stabilizer is 1.5% of the sum of the mass of the modifier and the aluminate mother liquor. The alcohol amine is triethanolamine, and the stabilizer is Wenlun rubber.

[0020] The preparation method of the low-resilience and low-alkali liquid quick-setting agent for shotcrete...

Embodiment 2

[0021] Embodiment 2: (low rebound and low alkali for shotcrete) liquid quick-setting agent of the present invention is made by the raw material of following component and mass ratio: aluminate mother liquor, modifier, alcohol amine, stabilizer agent. Wherein, the mass ratio of the modifier to the aluminate mother liquor is 1:4.5, the mass fraction of the aluminate mother liquor in this embodiment is 100 parts, the mass fraction of the modifier is 22.2 parts, and the mass fraction of the alkanolamine The number of parts is 1.22 parts, and the parts by mass of the stabilizer is 0.61 parts. The dosage of alcohol amine is 1.0% of the sum of the mass of the modifier and the aluminate mother liquor, and the dosage of the stabilizer is 0.5% of the sum of the mass of the modifier and the aluminate mother liquor. The alcohol amine is triethanolamine, and the stabilizer is EDTA.

[0022] The preparation method of the low-resilience and low-alkali liquid quick-setting agent for shotcre...

Embodiment 3

[0023] Embodiment 3: (low rebound and low alkali for shotcrete) liquid quick-setting agent of the present invention is made by the raw material of following component and mass ratio: aluminate mother liquor, modifier, alcohol amine, stabilizer agent. Wherein, the mass ratio of modifier to aluminate mother liquor is 1:3.0, the mass fraction of aluminate mother liquor in this embodiment is 100 parts, the mass fraction of modifier is 33.3 parts, the mass fraction of alcohol amine The number of parts is 2.0 parts, and the parts by mass of the stabilizer is 1.33 parts. The dosage of alcohol amine is 1.5% of the sum of the mass of the modifier and the aluminate mother liquor, and the dosage of the stabilizer is 1.0% of the sum of the mass of the modifier and the aluminate mother liquor. The alcohol amine is diethanolamine, and the stabilizer is xanthan gum (or Wenlun gum).

[0024] The preparation method of the low-resilience and low-alkali liquid quick-setting agent for shotcrete...

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Abstract

The invention relates to a low-resilience and low-alkaline liquid accelerator for sprayed concrete and a preparation method thereof. The accelerator is prepared from the following raw materials: an aluminate mother liquid, a modifier, hydramine and a stabilizer, wherein the mass ratio of the modifier and the aluminate mother liquid is 1: (1-5), the dosage of hydramine is 0.5-2.5% of the sum of the modifier and the aluminate mother liquid in mass, the dosage of the stabilizer is 0.3-2% of the sum of the modifier and the aluminate mother liquid in mass; the stabilizer is one of vinylon glue, EDTA (Ethylene Diamine Tetraacetic Acid) and xanthan gum. The preparation method comprises the following steps: preparing the aluminate mother liquid; preparing the modifier; and preparing the low-alkaline liquid accelerator. The adulterate amount of the accelerator provided by the invention is 3-6% mass of cement, the initial setting time is 3 minutes and the final setting time is 8 minutes, and the requirements of JC477-2005 accelerator for sprayed concrete are satisfied. The accelerator is uniform and stable and strong in adaptability with cement, can be used for effectively reducing resilience and dust amount in construction of prayed concrete, and is short in setting time and less in loss of long-term strength.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to a low-alkali liquid quick-setting agent for wet-sprayed concrete, belonging to the technical field of building materials, in particular to a low-resilience and low-alkali liquid quick-setting agent for sprayed concrete. The invention also relates to a preparation method of the liquid quick-setting agent. Background technique [0002] Accelerator is an admixture that makes cement set and harden quickly, and is mainly used in shotcrete construction. In the construction of tunnels, underground mines and other projects; shotcrete construction has incomparable advantages over ordinary concrete, and has become a necessary measure for such projects. The role of accelerator is to accelerate the setting and hardening of shotcrete and improve its early strength, thus laying the foundation for rapid construction. [0003] Traditional accelerators are mostly powder accelerators with high alkalinity,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B103/12
Inventor 王锦宇王进春康静沈太林杨晓锋刘翠芬
Owner 刘翠芬
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