Alkali and chlorine-free liquid setting accelerator based on industrial polyaluminium sulfate and its preparation method

A technology of polyaluminum sulfate and accelerator, applied in the field of building material admixtures, can solve the problems of high alkali content of liquid accelerator, large loss of 28d strength, short stability period, etc. Good effect without loss of strength

Active Publication Date: 2014-02-05
CHINA BUILDING MATERIALS ACAD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to solve the problems of high alkali content, large dosage, short stable period, large strength loss in 28 days, high cost and poor adaptability of liquid acceler

Method used

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  • Alkali and chlorine-free liquid setting accelerator based on industrial polyaluminium sulfate and its preparation method
  • Alkali and chlorine-free liquid setting accelerator based on industrial polyaluminium sulfate and its preparation method
  • Alkali and chlorine-free liquid setting accelerator based on industrial polyaluminium sulfate and its preparation method

Examples

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Embodiment 1-5

[0056] Example 1-5, preparation of alkali-free and chlorine-free liquid quick-setting agent based on industrial polyaluminum sulfate

[0057] Embodiment 1-5 is based on the raw material formula of the non-alkali and chlorine-free liquid quick-setting agent of industrial polyaluminum sulfate and comparative example as shown in table 1:

[0058] Table 1 Example 1-5 The raw material formula of the alkali-free and chlorine-free liquid quick-setting agent based on industrial polyaluminum sulfate (the data listed in the table is the percentage of the total weight, and the total weight is 100kg)

[0059]

[0060]

[0061] Prepare the alkali-free and chlorine-free liquid quick-setting agent according to the aforementioned method according to the ingredients listed in Table 1.

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Abstract

The invention discloses an alkali and chlorine-free liquid setting accelerator based on industrial polyaluminium sulfate. The liquid setting accelerator comprises the following raw materials by weight: 35-55% of polyaluminium sulfate, 5-25% of magnesium sulfate, alcohol amine accounting for 15-30% of the polyaluminum sulfate, 0-5% of an inorganic acid, 0-5% of a stabilizer, and the balance water. The liquid setting accelerator provided by the invention can be used in the wet jetting industry of sprayed concrete, belongs to alkali and chlorine-free liquid setting accelerators, has a stable period of more than 6 months, a 28d compressive strength ratio of greater than 100%, and good adaptability to different cement. When the dosage is 4.5%, the technical requirements of the JC477-2005 ''setting accelerators for sprayed concrete'' can be satisfied. The liquid alkali-free setting accelerator has superior performance, and can be widely used in tunnels, bridges, first-aid repair and other projects.

Description

technical field [0001] The invention belongs to the technical field of building material admixtures, in particular to an alkali-free and chlorine-free liquid quick-setting agent for tunnel and roadway wet shotcrete construction and a preparation method thereof. Background technique [0002] Accelerator is an admixture that makes cement concrete harden quickly, and is mainly used in tunnel shotcrete construction and mortar repair construction. The earliest accelerator that was put into use was the powder accelerator developed by Sika in the 1930s and 1940s. my country began to develop accelerators in the 1870s, and has achieved a number of research results, including Hongxing Type I, Type 711, Yangquan Type I, Yaoshan Type, and Type 782. Although these powdery accelerators have good coagulation-accelerating effects and are cheap, they cause serious corrosion to the eyes and skin of construction workers due to their high alkali content, and cause a large loss of strength in t...

Claims

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Application Information

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IPC IPC(8): C04B24/12C04B22/14
Inventor 王玲甘杰忠田培赵霞陈拴发关博文
Owner CHINA BUILDING MATERIALS ACAD
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