Preparation method of high-performance concrete mineral admixture

Abstract

The invention provides a preparation method of a high-performance concrete mineral admixture. The method comprises the following steps: taking converter slag, processing the converter slag through a hot braising technology to make the granularity less than 5 mm in order to obtain hot-braised converter slag, and grinding the hot-braised converter slag to form powder with the Blaine specific surface area of 300-400 m<2> / kg in order to obtain hot-braised converter slag powder; taking granulated blast furnace slag powder, and grinding the granulated blast furnace slag powder to form powder with the Blaine specific surface area of 400-500 m<2> / kg in order to obtain granulated blast furnace slag powder; taking and grinding limestone to form powder in order to obtain limestone powder; and uniformly mixing 1-5 parts by weight of the hot-braised converter slag powder, 4-10 parts by weight of the granulated blast furnace slag powder and 0-1.6 parts by weight of the limestone powder to obtain the high-performance concrete mineral admixture. The method has the advantages of reuse of industrial wastes, resource saving, reduction of the making cost of concrete, simple process, simple operation, easiness in operation, and easiness in wide application.

Description

[0001] 【Technical field】 [0002] The invention belongs to the field of building materials, and in particular relates to a preparation method of a high-performance concrete mineral admixture. [0003] 【Background technique】 [0004] In the field of building materials, concrete mineral admixtures refer to active or inert materials mixed into concrete to improve concrete performance, reduce cement consumption and reduce hydration heat. [0005] Commonly used concrete mineral admixtures include fly ash, ground slag and other materials, which are indispensable and important components in contemporary concrete engineering. The admixture in concrete not only plays the role of dispersing and filling, but also improves the construction performance of concrete. What is more important is that the admixture also participates in the hydration of cement, which has a great influence on the strength development, compactness and impermeability of concrete. great contribution. However, the di...

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Problems solved by technology

However, the disadvantage is that the incorporation of slag leads to a strong early water solidification rate, which makes the concrete dry shrinkage in the later stage. The greater the fineness of the slag, the greater the impact on the dry shrinkage; the main function of fly ash is to improve the working performance of concrete and improve Workability, but its strength is not high

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