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High-performance chlorine-free alkali-free liquid accelerating agent

A liquid quick-setting agent, high-performance technology, used in the field of concrete quick-setting agent, chlorine-free and alkali-free liquid quick-setting agent, can solve the problems of poor material compatibility, high production cost, strong corrosion, etc., to achieve long storage period , The effect of low production cost and low rebound rate

Active Publication Date: 2011-09-07
昆明合起工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now there are some products that claim to be non-alkali accelerators, which are basically neutralized by acid and alkali. The strong alkali products with a pH value above 13 are neutralized with acid to a pH value of about 7. The one-day strength and 28-day strength of the agent are low, and it is also extremely corrosive
There are also some products called alkali-free accelerators prepared by compounding methods such as aluminum salts, sodium salts, and lithium salts. This accelerator has the following defects: 1. Poor compatibility of materials; 2. Short shelf life Generally, it will agglomerate in 3-5 days; 3. The amount of mixing is large, often 10%; 4. The production cost is high, which can reach about 5,000 yuan per ton

Method used

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  • High-performance chlorine-free alkali-free liquid accelerating agent
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Examples

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Embodiment 1

[0022] Embodiment one: to produce 1000kg of high-performance chlorine-free and alkali-free liquid accelerator, 500kg of water, 150kg of magnesium aluminum fluoride, 300kg of aluminum sulfate, and 50kg of monoethanolamine are needed; production steps: 500kg of water is added to the mixing tank, and 150kg of fluorine is added Stir and dissolve magnesium and aluminum, add 50kg of monoethanolamine, and add 300kg of aluminum sulfate while stirring, and stir until dissolved to obtain the finished product.

Embodiment 2

[0023] Embodiment two: produce 500kg of high-performance chlorine-free and alkali-free liquid quick-setting agent, need water 285kg, magnesium aluminum fluoride 100kg, aluminum sulfate 100kg, diethanolamine 15kg; Production step is with embodiment one.

Embodiment 3

[0024] Embodiment three: produce 1000kg of high-performance chlorine-free and alkali-free liquid quick-setting agent, need water 440kg, magnesium aluminum fluoride 100kg, aluminum sulfate 400kg, diethanolamine 50kg, phosphoric acid 10kg; Production step: 440kg water is added in the mixing tank, Add 100kg of magnesium aluminum fluoride and stir to dissolve, add 50kg of diethanolamine, add 400kg of aluminum sulfate while stirring, stir until dissolved, and then add 10kg of phosphoric acid as a stabilizer to obtain the finished product.

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Abstract

The invention discloses a high-performance chlorine-free alkali-free liquid accelerating agent which is prepared from the following materials by weight percent: 6 to 15 percent of magnesium aluminum fluoride, 20 to 50 percent of aluminum sulfate, 2 to 6 percent of organic amines, 0 to 2 percent of stabilizer, and the balance of water. The production process comprises the following steps of: adding water at the given weight percent to a stirring drum, adding magnesium aluminum fluoride and stirring to dissolve, adding organic amines and stirring to dissolve, adding aluminum sulfate and stirring to dissolve, and making the final product. The high-performance chlorine-free alkali-free liquid accelerating agent is free of chlorine and alkali and non-corrosive to human beings and steel-bar-made machines, and has the advantages of long holding period, low addition amount, quick setting action, low rebound rate, high one-day strength, substantially no loss of long-term strength and good material compatibility. The production process is simple, pollution-free and noise-free, does not produce gas discharge or waste water, and is safe and environment-friendly. The materials are abundant, the production cost is low, and the social and economic benefits are extremely good.

Description

technical field [0001] The invention relates to a concrete accelerator, in particular to a chlorine-free and alkali-free liquid accelerator, which belongs to the technical field of building materials. Background technique [0002] Accelerator is a chemical admixture that makes cement set quickly, and can make cement set and harden in a short time. It is mainly used in shotcrete and shotcrete projects. Shotcrete has many advantages in construction and rock support, and has become a very important and necessary measure in modern underground engineering, especially the development of wet-mix shotcrete technology, which greatly expands the use of shotcrete in underground engineering scope. The main function of the liquid quick-setting agent for shotcrete is to accelerate the setting of the concrete mixture and improve the early strength, which can increase the thickness of the sprayed layer and shorten the time for spraying the next layer. With economic development and technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B22/14C04B22/12
CPCC04B40/0039
Inventor 王庄陈家荣
Owner 昆明合起工贸有限公司
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