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Alkali-free liquid accelerator and preparation method thereof

A technology of quick-setting agent and liquid, applied in the field of alkali-free liquid quick-setting agent and its preparation, can solve problems such as damage to human health, corrosion of construction equipment, etc., so as to reduce pollution, avoid corrosion, and shorten the time of initial setting and final setting. Effect

Inactive Publication Date: 2018-01-19
PANZHIHUA CITY JIYUAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkaline quick-setting agent is extremely corrosive, which not only corrodes construction machinery and tools during production and construction, but also seriously damages human health

Method used

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  • Alkali-free liquid accelerator and preparation method thereof

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preparation example Construction

[0019] The present invention proposes a kind of preparation method of non-alkali liquid quick-setting agent, comprises the following steps:

[0020] Mix 35-45 parts by weight of water with 0.5-0.8 parts by weight of precipitated hydrated magnesium silicate, stir at 40°C for 15-20 minutes, then add 5-10 parts by weight of ferrous sulfate and 2.5-3 parts by weight Mix and stir the sodium fluoride for 8-15 minutes, then add 40-50 parts by weight of aluminum sulfate, heat to 75°C-85°C, react for 1 hour, add 1-1.8 parts by weight of magnesium fluorosilicate, stir for 20-40 minutes, and finally Add 2.5-3.5 parts by weight of diethanolamine and stir for 18-25 minutes to prepare the alkali-free liquid quick-setting agent.

[0021] First add precipitated hydrated magnesium silicate in the water, the purpose is to make the precipitated hydrated magnesium silicate can be well dispersed in water, if the precipitated hydrated magnesium silicate is added later, the dispersion will not be go...

Embodiment 1

[0025] A preparation method of an alkali-free liquid quick-setting agent, comprising the following steps:

[0026] Mix 35g of water with 0.5g of precipitated hydrated magnesium silicate, stir at 40°C for 15min, then add 5g of ferrous sulfate and 2.5g of sodium fluoride, mix and stir for 8min, then add 40g of octadecanohydrate sulfuric acid aluminum, heated to 75°C, reacted for 1 hour, then added 1 g of magnesium fluorosilicate, stirred for 20 minutes, and finally added 2.5 g of diethanolamine and stirred for 18 minutes to obtain an alkali-free liquid quick-setting agent.

Embodiment 2

[0028] A preparation method of an alkali-free liquid quick-setting agent, comprising the following steps:

[0029] Mix 45g of water with 0.8g of precipitated hydrated magnesium silicate, stir at 40°C for 20min, then add 10g of ferrous sulfate and 3g of sodium fluoride, mix and stir for 15min, then add 50g of octadecahydrate aluminum sulfate , heated to 85°C, reacted for 1 hour, added 1.8g of magnesium fluorosilicate, stirred for 40 minutes, and finally added 3.5g of diethanolamine and stirred for 25 minutes to obtain an alkali-free liquid quick-setting agent.

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Abstract

The invention provides an alkali-free liquid accelerator and a preparation method thereof and belongs to the technical field of concrete admixtures. The alkali-free liquid accelerator is prepared fromthe following raw materials: aluminum sulfate, ferrous sulfate, sodium fluoride, magnesium fluosilicate, precipitated hydrated magnesium silicate, diethanol amine and water. The alkali-free liquid accelerator has a good rapid hardening effect, can effectively shorten the coagulating and final setting time of concrete, and effectively improves the early strength and the later strength of concrete.The preparation method of the alkali-free liquid accelerator comprises the following steps: stirring water and precipitated hydrated magnesium silicate for 15-20 min at 40 DEG C; then adding ferroussulfate and sodium fluoride, and performing mixing and stirring for 8-15 min; after that, adding aluminum sulfate; performing heating up to 75-85 DEG C; after a reaction for 1 h, adding magnesium fluosilicate, and performing stirring for 20-40 min; and at last, adding diethanol amine, performing stirring for 18-25 min to prepare the alkali-free liquid accelerator. The preparation method is simple,the reaction is safe, and the prepared accelerator has good dispersibility.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, and in particular relates to an alkali-free liquid quick-setting agent and a preparation method thereof. Background technique [0002] Since the concrete wet spraying process is characterized by high productivity, there is basically no dust during construction, the water-cement ratio is easy to control when concrete is mixed, the homogeneity is high, and the spraying effect is good. Liquid accelerator is mainly used in: high-speed rail, high-speed, subway tunnel construction, for sprayed concrete. Adding accelerator to sprayed cement slurry, cement mortar, and concrete can not only accelerate the setting and hardening speed of cement, improve the early strength, but have little effect on the later strength, or even not decrease, and greatly improve the cohesion of concrete and mortar And bonding strength, reduce the rebound rate, effectively reduce the material loss caused by the reb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/14C04B103/12
Inventor 何晓君何中建
Owner PANZHIHUA CITY JIYUAN TECH
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