Large-admixing-amount-fly-ash C40 self-compacting concrete

Abstract

The invention discloses large-admixing-amount-fly-ash C40 self-compacting concrete.The concrete comprises cementitious materials, aggregates, an admixture and water, the cementitious materials comprise cement and blending materials, the blending materials comprise fly ash and mineral powder, the aggregates include the coarse aggregates and the fine aggregates, and the admixture is a self-compacting special polycarboxylic-type water reducing agent.Per cubic meter of the concrete comprises 200 kg-280 kg of cement, 0 kg- 90 kg of mineral powder, 125 kg-200 kg of fly ash, 700 kg-1,000 kg of sand, 800 kg-950 kg of stone, 0.3 kg-10 kg of water reducing agent and 110 kg-170 kg of water.According to the large-admixing-amount-fly-ash C40 self-compacting concrete, as the fly ash and the mineral powder are combined and mixed, and the large amount of fly ash is admixed, the content of the cement is decreased, the production cost of the concrete is reduced, hydration heat of the cement can be further reduced, the workability of the concrete is improved, and the durability of the concrete is improved.

Description

technical field [0001] The invention relates to a self-compacting concrete, in particular to a large-volume fly ash C40 self-compacting concrete. Background technique [0002] Self-compacting concrete is a high-performance concrete that can be compacted without vibration (or light vibration) under its own gravity. Because of its excellent workability, no manual additional vibration is required during the pouring stage, and the mold can be densely filled by relying on its own weight, which can not only significantly reduce noise in concrete construction, save labor, improve production efficiency, but also solve problems in traditional concrete construction. Problems caused by human factors such as leakage and over-vibration, such as pockmarks, flooding, or difficulty in vibrating due to dense steel bars and complex structures, so as to improve the quality of concrete projects. However, the material composition of self-compacting concrete usually has two characteristics: (1) ...

AI Technical Summary

Problems solved by technology

Studies at home and abroad have shown that the application of high-volume fly ash concrete in building structures is feasible, but there is currently no C40 self-compacting concrete that combines fly ash and mineral powder and high-volume fly ash concrete Application in combination with C40 self-compacting concrete

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