Hydrated crystal nucleus concrete coagulation accelerating early strength agent and preparation method thereof

A technology of accelerating early strength and concrete, which is applied in the field of concrete additives, can solve the problems of slow cement hydration rate, insufficient super early strength performance and accelerating effect, and crystal nucleus agglomeration, so as to promote cement hydration and shorten the mold Turnover period, effect of improving early strength
CN112694280AActive Publication Date: 2021-04-23GUANGDONG REDWALL NEW MATERIALS +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGDONG REDWALL NEW MATERIALS
Publication Date
2021-04-23

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Abstract

The invention relates to preparation and application of a hydrated crystal nucleus concrete coagulation accelerating early strength agent, which takes a water-soluble polymer dispersant as a template and ground Portland cement clinker as a nucleating substance to prepare a hydrated crystal nucleus suspension. Through the synergistic effect of different functional groups of the polymer dispersing agent and the special design of the molecular structure, the polymer dispersing agent can be quickly adsorbed to the surface of the instantly generated C-S-H crystal nucleus and has a stable dispersing effect, meanwhile, the C-S-H crystal nucleus is prevented from further growing and becoming larger, the size (30-120 nm) of the crystal nucleus is effectively controlled, and coagulation of crystal nucleus suspension liquid is avoided. The crystal nucleus suspension can significantly promote the hydration of cement, quickly improve the early strength of concrete, effectively shorten the initial and final setting time of concrete, meet the form removal strength requirements of prefabricated parts within 6-8 hours under natural conditions, and greatly shorten the mold turnover period.
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Description

technical field

[0001] The invention relates to the field of concrete additives, in particular to a hydration crystal nucleus concrete coagulation accelerator and early strength agent and a preparation method thereof. Background technique

[0002] With the continuous development of modern concrete technology, the requirements for the early strength of concrete are getting higher and higher, and the demand for concrete prefabricated components is increasing sharply. One of the most important indicators for the production of prefabricated components is the development of early concrete strength, that is, rapid Reach the mold removal strength (≥15MPa), in order to facilitate the rapid turnover of molds, shorten the turnover period of molds, and save production costs.

[0003] At present, the use of steam curing technology is a common method to improve the early strength of precast concrete components, but improper steam curing operation will cause quality defects in steam cured...

Claims

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