Rock-based mineral admixture and preparation method thereof

Abstract

The invention discloses a concrete rock-based mineral admixture by taking sandstone chips as a main raw material. The concrete rock-based mineral admixture comprises the following raw materials in parts by weight: 88-94 parts of sandstone chips, 5-9 parts of grade I fly ash, 1-3 parts of alum, 0.1-0.3 parts of a dispersant, and 0.1-0.3 parts of a grinding aid; and the sandstone chips comprise thefollowing main components: 65-85% of silica content, 5-10% of calcium oxide content, and 8-15% of alumina content. The concrete rock-based mineral admixture by taking sandstone chips as the main raw material is the novel concrete mineral admixture, the sandstone chips with an abundant local resource are taken as a main material source, the material source of the concrete admixture is widened, thearea unbalance problem of the concrete admixture resource can be better solved, the concrete rock-based mineral admixture can improve concrete working performance, reduces the heat of hydration, solves the environment pollution problem of the stone chips, and has good social benefit and economic benefit.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a concrete rock-based mineral admixture with sandstone chips as the main raw material and a preparation method thereof. Background technique [0002] In the process of continuous development of roads, railways, ports and urban construction, concrete has played a huge role as a basic building material, and mineral admixtures, as an important component of commercial concrete, have been continuously developed in recent years. Using mineral admixtures such as mineral powder and fly ash to partially replace cement in concrete can not only improve resource utilization and reduce concrete costs, but also improve many properties of concrete, such as reducing the heat of hydration, reducing concrete drying shrinkage, and improving concrete coagulation. time, enhanced durability, etc. Mineral admixtures have become an integral part of concrete. [0003] Traditional concrete mi...

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Problems solved by technology

[0003] Traditional concrete mineral admixtures, such as fly ash and slag, come from large industrial enterprises such as power plants and iron factories. Due to the imbalance of regional resources, they are scarce resources in certain areas, and their transportation costs are too high. Therefore, it is necessary to adapt measures to local conditions. Developed a new type of mineral admixture

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