A liquid alkali-free quick-setting agent widely suitable for various types of cement

A technology of accelerator and cement, which is applied in the field of engineering construction, can solve the problems of poor adaptability of alkali-free accelerator to cement, achieve good storage stability, good construction environment, and improve applicability
CN109206040BActive Publication Date: 2021-01-15RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
Publication Date
2021-01-15

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Abstract

The invention provides a liquid alkali-free setting accelerator widely applicable to various types of cement, wherein the liquid alkali-free setting accelerator includes 35-60 parts by weight of water, 40-50 parts by weight of polyaluminum sulfate or aluminum sulfate, 0-5 parts by weight of iron sulfate, 0-3 parts by weight of a complexing agent, 2-5 parts by weight of organic amine, 2-5 parts byweight of an early strength agent, 0-2 parts by weight of a pH regulator, 0.5-1 part by weight of a slag activator, 0.1-0.3 part by weight of a defoamer, and 2-8 part by weight of aluminum fluoride. The invention also provides a preparation and application of the liquid alkali-free setting accelerator. The liquid alkali-free setting accelerator provided by the invention is especially suitable forshotcrete, has wide adaptability to various kinds of cement, can improve the applicability of the alkali-free setting accelerator to cement, improves the strength of the shotcrete, and is more widelyapplied in various projects.
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Description

technical field

[0001] The invention belongs to the field of engineering construction, and in particular relates to a coagulant used in concrete construction. Background technique

[0002] Accelerator is a chemical admixture that can make cement paste, mortar or concrete set and harden quickly without unduly affecting its long-term strength. Since the accelerator started to be produced and used, it has become one of the important components of shotcrete due to its remarkable characteristics in quick-setting and early strength. The type and quality of accelerators directly affect the quality of shotcrete. Therefore, the research on shotcrete at home and abroad puts accelerators in a very important position.

[0003] At present, alkaline liquid quick-setting agents are mostly used in our country, which are usually made of sodium aluminate or sodium silicate as the main component, and then mixed with alcohol amine, tackifier and other components dissolved in water. Its effect...

Claims

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