Ecological self-compact concrete

Abstract

The invention discloses ecological self-compact concrete. The ecological self-compact concrete is prepared from the following components: a volume fraction of coarse aggregates is 0.35 to 0.38, a volume fraction of fine aggregates is 0.34 to 0.43, a volume fraction of micro aggregates is 0.01 to 0.10, the consumption of cement is 180 to 380 kg / m<3>, the consumption of mineral admixtures is 120 to300 kg / m<3>, the consumption of a water reduction agent is 0.5 to 2.0 percent of the consumption of gel materials, a doping amount of macromolecular rheology modifier is 0.001 to 0.05 percent of the weight of the gel materials, and the doping amount of the mineral rheology modifier is 1 to 5 percent of the weight of the gel materials. The fine and micro aggregates are adopted to compensate a grading gap between the gel material and the fine aggregate, the inclusion force of slurry for the aggregates can be increased by virtue of the macromolecular rheology modifier or the mineral rheology modifier, and the high mobility and separation resistance of the concrete can be maintained under the condition of little slurry. Due to the excellent workability of the self-compact concrete, the cost ofthe ecological self-compact concrete provided by the invention is significantly decreased, and a valuable way for promoting the self-compact popularization and application can be provided.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an ecological self-compacting concrete. Background technique [0002] With the change of economy and society, our country's concrete construction technicians and skilled operators are increasingly scarce, and the quality of concrete projects is closely related to the construction level of skilled workers. Due to its self-compacting ability, self-compacting concrete basically does not rely on manual vibration, basically eliminates the internal defects of concrete and has a beautiful texture, less noise and vibration pollution in the construction process, saving labor costs and avoiding the impact of project quality on skilled workers Dependency etc. However, the realization of conventional self-compacting concrete requires a large amount of slurry components, so that the amount of cementitious material in the concrete is too large, and the volume fraction of coarse agg...

AI Technical Summary

Problems solved by technology

However, the realization of conventional self-compacting concrete requires a large amount of slurry components, so that the amount of cementitious material in the concrete is too large, and the volume fraction of coarse aggregate is between 28-35%, and the concrete is prone to aggregate settlement after pouring. Excessive stress of concrete on formwork

The most critical thing is that the material cost of self-compacting concrete is significantly increased due to the excessive amount of cementitious material, and it is the high material cost that has become one of the bottlenecks restricting its promotion and application. At present, the application of self-compacting concrete is limited to key projects and Engineering special parts

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