Concrete applicable to rear insertion cage and preparation method thereof

Abstract

The invention discloses concrete applicable to a rear insertion cage, and a preparation method thereof. The concrete is characterized in that the technical parameter of a raw material of the concrete and the weight mixing ratio of the concrete of each cubic meter are that the strength grade of the concrete is C15-C40, and the ratio of water to a binder is 0.62-0.33. Cement is P.O42.5 cement; the dosage of the cement is 178 kg to 311 kg; sand is medium sand with a fineness modulus of 2.5-2.9; a waste stone has continuous gradations of 5-25 mm; the dosage of the waste stone is 45%-80% of the total amount of a coarse aggregate; pulverized fuel ash is grade-II pulverized fuel ash; the mixing amount of the pulverized fuel ash is 15%-28% of the total amount of a binding material; mineral powder is grade-S95 mineral powder; the mixing amount of the mineral powder is 10%-25% of the total amount of the binding material; and a sand ratio is selected to be 51%-42% from a low one to a high one according to a strength grade. The concrete is favorable in workability and water-retaining property; the difficulty of implanting a reinforcing cage and phenomena of coarse aggregate subsidence, concrete disintegration, bleeding and the like generated in an implantation process are avoided; the construction time is reduced; the construction efficiency is improved; a mineral admixture and a mineral waste stone are used reasonably; the utilization of a high-pollution and high-energy-consumption resource is reduced; and the production cost is decreased.

Description

technical field [0001] The invention belongs to the field of concrete building materials, in particular to a concrete grout that can be directly applied to post-inserted concrete piles and a preparation method thereof. Background technique [0002] At present, in order to save costs, most construction units sign contracts with concrete companies for the supply of ordinary pile foundation concrete. The slump of this kind of concrete is generally between 180-220mm. Although the reinforcement cage can basically be implanted smoothly, if only Relying on the self-weight of the reinforcement cage, only a small part of the reinforcement cage can be implanted into the concrete, and most of the entire reinforcement cage can only be implanted into the concrete by applying external force vibration, and the work efficiency is relatively low. If the reinforcement cage is implanted for too long, or the concrete slump loss is too fast, it will cause the cage to fail or cause defects in the...

AI Technical Summary

Problems solved by technology

[0002] At present, in order to save costs, most construction units sign contracts with concrete companies for the supply of ordinary pile foundation concrete. The slump of this kind of concrete is generally between 180-220mm. Although the reinforcement cage can basically be implanted smoothly, if only Relying on the self-weight of the reinforcement cage, only a small part of the reinforcement cage can be implanted into the concrete. Most of the entire reinforcement cage can only be implanted into the concrete by applying external force vibration, and the work efficiency is relatively low.

If the reinforcement cage is implanted for too long, or the concrete slump loss is too fast, it will cause the cage to fail or cause defects in the concrete pile

At the same time, this kind of ordinary concrete has less mineral admixtures and mineral waste utilization, and the production cost is relatively high

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