Novel early strength agent for concrete and method for preparing novel early strength agent

Abstract

The invention discloses a novel early strength agent for concrete and a method for preparing the novel early strength agent. The novel early strength agent comprises, by weight, 20-25 parts of CaO, 20-25 parts of Al2O3, 4-6 parts of Nb2O5, 3-7 parts of MgSO4, 15-20 parts of barite powder, 15-20 parts of zeolite powder, 0.3-0.7 part of Bi2O3, 1-3 parts of Li2CO3, 0.2-0.4 part of NaCl and 0.2-0.4 part of KCl. The method includes carrying out ball-milling on various components; calcining the various components at the temperatures of 850-900 DEG C; carrying out ball-milling on the various components and reagents such as calcium and aluminum hydrotalcite to obtain the novel early strength agent for the concrete. The novel early strength agent and the method have the advantages that excellent early strength effects can be realized by the novel early strength agent, the novel early strength agent is high in strength, has low calcination temperature and is a promising admixture for the concrete, and the like.

Description

technical field [0001] The invention relates to a novel concrete early strength agent and a preparation method thereof, belonging to the technical field of concrete admixtures. Background technique [0002] With the rapid development of the economy, the role of concrete in construction has become more and more important, which virtually puts forward higher and higher requirements for concrete. In order to improve the performance of concrete and meet the needs of concrete construction, those skilled in the art often use the method of adding concrete admixtures to concrete. Among them, the commonly used concrete admixtures include water reducing agent, retarder, early strength agent, waterproofing agent and so on. [0003] The early strength agent is an admixture that can accelerate the hydration rate of cement and increase the early strength of concrete without significantly affecting the later strength. According to the chemical composition, it is mainly divided into inorg...

AI Technical Summary

Problems solved by technology

Although it can achieve a certain early strength effect, it is still unsatisfactory in terms of concrete application, especially in terms of concrete strength.

In addition, its calcination temperature is relatively high at 1250-1400°C, which increases the production cost virtually and restricts the development of accelerators to a certain extent.

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