A kind of concrete hydration temperature rise inhibitor and preparation method thereof

Abstract

The invention provides a concrete hydration temperature rise inhibitor, which belongs to the technical field of concrete admixtures. It is prepared by grinding, sieving and drying the following components by mass: 5-10 parts of modified waste concrete hydration product, 20-45 parts of modified metakaolin, 2-10 parts of sodium metasilicate, sulfuric acid 5-10 parts of salt, 30-50 parts of fly ash. The invention also provides a preparation method of the concrete hydration temperature rise inhibitor. The raw material of the hydration temperature rise inhibitor of the present invention includes discarded concrete cement stone, which has the advantages of resource utilization of solid waste, reduces environmental pollution, and conforms to the trend of energy saving and environmental protection; the modified waste concrete hydration product and modified metakaolin have the advantages of being used in concrete water The function of slow gradual release during the hydration process ensures arbitrary adjustment within the control range to meet the control of hydration progress; the preparation process of the concrete hydration temperature rise inhibitor of the present invention is simple, only involving calcination, grinding and dispersion, and product quality control It has low requirements, high production efficiency and great potential for economic benefits.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to a concrete hydration temperature rise inhibitor and a preparation method thereof. Background technique [0002] With the rapid development of my country's infrastructure construction, there are more and more large-scale modern technical facilities and high-rise buildings, and mass structural concrete, as an important part of its main body, has emerged in recent years. Due to the large construction volume of mass concrete, the internal heat of hydration in the concrete is not easy to be exported in a short period of time, resulting in high internal temperature of mass concrete and large temperature difference between inside and outside, which may easily cause cracks in mass concrete and affect the quality of the project. [0003] At present, the temperature and cracks of mass concrete structures are generally controlled from two aspects of material design and construct...

AI Technical Summary

Problems solved by technology

In terms of concrete admixtures, it is common to use dextrin-based concrete hydration heat control materials to control the cement hydration rate by controlling its solubility in water, but the effect of reducing the hydration rate is limited and cannot be reduced. The total amount of heat of hydration as a whole is difficult to reduce the temperature peak because the internal heat of large-volume concrete is not easy to dissipate; in addition, the phase change energy storage material is used to absorb the heat of cement hydration to reduce the highest temperature peak, but there is a large amount Large, inconvenient use and other defects, and there are uncertainties in the impact on other properties of concrete, which limits its application to a certain extent

Images