Composite mineral admixture for concrete

Abstract

The invention discloses a composite mineral admixture for concrete. The composite mineral admixture comprises the following components in percentage by weight: 15-20% of cement clinker, 30-40% of mineral powder, 8-15% of silica fume, 20-30% of limestone powder and 15-25% of fly ash, wherein the limestone powder is obtained by processing mining debris. According to the composite mineral admixture disclosed by the invention, the gel material is added at a proportion of 20-40%, so that the economic benefits are remarkable while the production needs of high-performance concrete and high-strength concrete are met, and the economic and social benefits are also very high; by adopting the composite mineral admixture, the use of cement is reduced; and by mass utilization of industrial wastes such as mineral powder, limestone powder, fly ash and relatively low-quality silica fume, the waste of resources is reduced, and the sustainable development of the concrete industry is promoted.

Description

Technical field: [0001] The invention relates to the technical field of composite mineral admixtures, in particular to a composite mineral admixture for concrete produced from waste resources such as fly ash, limestone powder (mining debris), and low-quality silica fume with low production cost. The composite mineral admixture for concrete provided by the invention can enhance the durability and crack resistance of concrete. Background technique: [0002] Cement is one of the pillars of my country's basic raw material industry. Cement is used in concrete. Steel bars and concrete are the main forms of my country's building structures. my country's concrete consumption accounts for about 60% of the world's total. During the mass production of cement, it will be discharged A large amount of carbon dioxide causes environmental pollution, and the mass production of cement needs to consume a large amount of coal, water, electricity and mine resources, etc., resulting in a shortage ...

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Problems solved by technology

[0002] Cement is one of the pillars of my country's basic raw material industry. Cement is used in concrete. Steel bars and concrete are the main forms of my country's building structures. my country's concrete consumption accounts for about 60% of the world's total. During the mass production of cement, it will be discharged A large amount of carbon dioxide causes environmental pollution, and the mass production of cement needs to consume a large amount of coal, water, electricity and mine resources, etc., resulting in a shortage of resources, resulting in the inability of the concrete industry to develop sustainably, and my country's main energy bases are supporting While the national economy is developing rapidly, a large amount of industrial fly ash, mining debris, silica fume and other solid wastes are produced, causing environmental pollution and idle resources

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