Slope self-compacting concrete and pouring construction method thereof

Abstract

The invention provides a slope self-compacting concrete. The slope self-compacting concrete is prepared from the following components in parts by weight: 60 to 70 parts of Portland cement, 60 to 100 parts of coarse aggregate, 48 to 78 parts of fine aggregate, 15 to 30 parts of mineral admixture and 0.6 to 2.1 parts of an additive, wherein the water-binder ratio is 0.26 to 0.35; the coarse aggregate is granite stone; the fine aggregate is river sand; the mineral admixture is a mixture of steel slag, fly ash and silicon powder according to a mass ratio of 1: 1: 0.5; the additive is a water reducing agent; and the steel slag is steel slag micro-powder subjected to surface modification by nano silicon dioxide. The steel slag micro-powder is subjected to surface silicon dioxide modification, the volcanic ash activity of the steel slag micro-powder is improved, the steel slag micro-powder can replace a part of a conventional admixture, meanwhile, the early strength of the doped concrete is improved, the application range of the steel slag concrete is expanded, and the production cost is also reduced.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a slope self-compacting concrete and a pouring construction method thereof. Background technique [0002] Concrete vibrating and compacting on sloped roofs has always been a difficult construction problem. In order to control the pouring thickness of the slab, thickness control points should be evenly arranged on the slab surface at a scale of 1000mm×1000mm. According to experience, for the vibration of beams, special attention should be paid to the uniform vibration of the plug-in vibrator in each section. If the vibration time is too long, it will easily cause local coarse aggregate concentration and separation of mortar and coarse aggregate. For slab concrete, too much vibrating concrete is easy to flow, which makes it difficult to control the flatness of the slab surface. Using vibration-free self-compacting concrete with large fluidity is an effective way to facilitate the ...

AI Technical Summary

Problems solved by technology

Steel slag is ironmaking tailings, and its mineral composition is mainly composed of tricalcium silicate, followed by dicalcium silicate, RO phase, dicalcium ferrite, free calcium oxide, and iron oxide. After the steel slag has been pre-treated and ground The obtained steel slag powder has certain activity, and has the potential to be used as concrete mineral admixture and cement mixture. The performance of the material is not high, requiring extremely high grinding fineness and high dosage, and the high dosage of steel slag is not good for the growth of the early strength of concrete, and the steel slag is limited by its low admixture activity. Applications in dense concrete

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