Green self-compacting concrete and its preparation method

Abstract

The invention discloses a green self-compacting concrete and a preparation method thereof. The preparation method comprises the following steps that: according to a solid particle accumulation way and a compressible accumulation model, calculating the accumulation compactness of a binding material system, an aggregate system and a mixed material system; obtaining a pre-selected binding material combination, an optimal sand ratio and a volume ratio of a pre-selected material system to the aggregate system; according to the compressive strength requirement of the green self-compacting concrete and the accumulation compactness of the binding material system, determining a mass ratio of water to the binding material system, and calculating the specific mixing amounts of the binding material system, the aggregate system and the water; according to the specific mixing amount of the binding material system, determining the mixing amount of water reducing agent; and evenly stirring and mixing to obtain the green self-compacting concrete. By use of the green self-compacting concrete, from the perspective of solid particle accumulation, the property of raw materials which are practically selected is considered, the compressible accumulation model is combined to optimize the accumulation compactness, and the use amount of the binding material is obviously lowered.

Description

technical field [0001] The invention relates to the field of concrete, in particular to green self-compacting concrete and a preparation method thereof. Background technique [0002] Self-compacting concrete relies on its own weight without additional manual or mechanical vibration. It has excellent working properties such as large fluidity, homogeneity and segregation resistance in pouring construction, and has good mechanical and durable properties after hardening. concrete. However, in the mix design of self-compacting concrete, the content of cementitious materials is usually large, resulting in high heat of hydration, large shrinkage and creep after hardening, and the CO produced in the concrete production process 2 Larger emissions will aggravate environmental pollution, while CO 2 The main source of emissions is cement, which accounts for about 2 74%-81% of the emission, followed by coarse aggregate, accounting for about 13%-20%. Therefore, the development of gree...

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a method for preparing green self-compacting concrete, which aims to solve the technical problems of high cost and heavy pollution caused by the large amount of cementitious materials in existing concrete

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