Method for preparing C40 concrete by artificial rock ash and mineral waste

Abstract

The invention relates to a method for preparing C40 concrete by artificial rock ash and mineral waste. Main materials include cement, mineral powder, coal ash, natural river sands, stones and the artificial rock ash, the artificial rock ash and the natural river sands are blended into fine aggregates, the artificial rock ash is broken stone fragments, the nominal diameter of the artificial rock ash is smaller than 5mm, the artificial rock ash contains 10%-20% of stone powder, sulfonated melamine resin is compounded with modified tannin to serve as an additive, the cement is P.O 42.5 cement, and the prepared concrete comprises, by weight, 260 parts of cement, 80 parts of coal ash, 110 parts of mineral powder, 216 parts of artificial rock ash, 504 parts of river sands, 1071 parts of stones, 10 parts of additive and 165 parts of water. The waste such as the artificial rock ash, the mineral powder and the coal ash is maximally used on the premise of meeting usability and durability of the concrete, resources are saved, and environments are protected.

Description

technical field [0001] The invention relates to a method for preparing concrete, in particular to a method for preparing C40 concrete by using artificial sandstone powder and mineral waste. Background technique [0002] As the aggregate of concrete, sand and gravel account for more than 70% of the mass of the concrete mixture. With the development of the construction industry and the limited resources of natural river sand, the source of production has certain regional characteristics. Long-term large-scale excavation will inevitably cause environmental damage. Destruction, and the current natural river sand is already in short supply. In the process of limestone gravel production, a large amount of stone chips—artificial sand and gravel powder will be produced. If not utilized, it will not only cause a huge waste of resources, but also cause great damage to the environment over time. Therefore, using artificial sandstone powder as a substitute for natural river sand to pre...

AI Technical Summary

Problems solved by technology

[0003] In practical engineering applications, due to the lack of quality control standards for controlling artificial sand and gravel powder and the screening and grading of artificial sand and gravel powder, the market for artificial sand and gravel powder is chaotic, and the quality is uneven. Great waste and environmental pollution