Crystal nucleus concrete early strength agent and preparation method thereof

Abstract

The invention discloses a crystal nucleus concrete early strength agent and a preparation method thereof. 1,000 parts of crystal nucleus concrete early strength agent are prepared from the following raw materials in parts by weight: 100-150 parts of a polymer, 20-50 parts of sodium metasilicate pentahydrate, 60-90 parts of calcium nitrate tetrahydrate and the balance of deionized water. The preparation method comprises the steps of firstly adding the polymer to a three-neck flask, adding the deionized water to form a base solution, putting the flask into a hot water bath, controlling the temperature and stirring; taking the sodium metasilicate pentahydrate, and adding the deionized water to prepare a solution A; taking the calcium nitrate tetrahydrate and adding the deionized water to prepare a solution B; dropwise adding the solution A and the solution B to the base solution at the same rate, carrying out heat preservation on the product, stirring and reacting; and finally quickly cooling a product to a room temperature to obtain the final product, namely the crystal nucleus concrete early strength agent. The crystal nucleus concrete early strength agent is good in performance, is capable of making concrete solidified quickly, is short in demolding time and not easy to collapse and has a certain water reducing effect, and the later strength loss of the concrete is small.

Description

technical field [0001] The invention relates to a concrete early-strength agent, in particular to a crystal nucleus type concrete early-strength agent, and belongs to the technical field of building material admixtures. The invention also relates to a preparation method of the crystal nucleus type concrete accelerator. Background technique [0002] With the acceleration of my country's urbanization process and the rapid development of transportation network construction, especially the construction of high-speed railways and subways, prefabricated concrete structures have become an important development direction of my country's concrete industry. Higher requirements. At the same time, with the establishment, implementation and deepening of my country's sustainable development strategy, higher requirements have been put forward for the service life of concrete. The current chloride-based early-strength agents and sulfate-based inorganic early-strength agents contain chloride...

AI Technical Summary

Problems solved by technology

[0004] The above technologies have not given specific guidance on how to make the concrete early strength agent so that the concrete can solidify quickly, the demoulding time is short, the mold is not easy to collapse, and it has a certain water reducing effect, and the strength loss of concrete is small in the later stage.

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