Super-slowly coagulant adaptive to variaty concrete water reducers and prepn. thereof

A technology of super retarder and ethylene polyamine alkyl phosphonic acid, which is applied in the field of concrete super retarder, can solve problems such as incompatibility, and achieve the effects of reducing slump loss, small dosage and good adaptability
CN1834053AInactive Publication Date: 2006-09-20TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
TONGJI UNIV
Publication Date
2006-09-20
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

This invention relates to the field of concrete super-retarding reagents that are compatible with all kinds of concrete water reducers. The super-retarding reagent in this invention has a mass-fraction composition as follows: 6~35% ethylene polyamine alkyl phosphonic acid or its salt, 5~15% phosphonobutane tricarboxylic acid and 50~90% water. The super-retarding reagent is compatible with different kinds of water reducers and cement, and can greatly reduce the loss of concrete mixture slump. The super-retarding reagent performs extraordinary retarding activities, and concrete solidification time can be adjusted to 3~150 hours by modulating product composition and dosage according to actual engineering demand.
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Description

technical field

[0001] The invention relates to the field of a super retarder for concrete which can be adapted to various types of concrete water reducing agents. Background technique

[0002] Concrete super retarder technology is a new development direction of today's concrete technology, and is widely used in the construction of large-volume concrete projects such as underground and dams. Compared with ordinary concrete retarder, it is an admixture that can adjust the setting time of concrete arbitrarily for a long time without destroying the performance of concrete and not affecting the later strength of concrete. At present, the concrete retarders used at home and abroad are divided into two categories, inorganic and organic. The inorganic type mainly includes borax, zinc oxide, phosphate and metaphosphate, etc. The organic type mainly includes lignosulfonate, hydroxycarboxylic acid (salt), sugars and carbohydrates, polyols and their derivatives, etc. However, these r...

Claims

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