Rigid self-compacting waterproof concrete for underground engineering building construction and preparation method thereof

Abstract

The invention relates to rigid self-compacting waterproof concrete for underground engineering building construction and a preparation method of the rigid self-compacting waterproof concrete. The concrete is mainly prepared from water and the following components in parts by weight: 300-330 parts of Portland cement, 1050-1100 parts of coarse aggregate, 680-720 parts of fine aggregate, 80-90 partsof precoated sand, 18-20 parts of silica fume, 5.2-5.6 parts of an additive and 0-25 parts of an expanding agent, wherein the ratio of water to binder is 0.36 to 0.40; the precoated sand takes fine sand as a core, and the surface of the fine sand is coated with a siliceous film layer formed by an organic silicon material and a powder layer mainly formed by a waterproof admixture. The rigid self-compacting waterproof concrete mixture has the advantages of good workability, uniform and compact concrete structure, high mechanical strength and good impermeability and waterproofness; compared withcommon waterproof concrete, the rigid self-compacting waterproof concrete mixture is high in impermeability grade, good in durability, wide in raw material source and suitable for underground engineering building construction operation.

Description

technical field [0001] The invention belongs to the technical field of self-waterproof concrete, and in particular relates to a rigid self-compacting waterproof concrete for underground engineering construction and a preparation method thereof. Background technique [0002] With the development of the city and the extraordinary prosperity of the construction industry, in order to make full use of land resources, people are paying more and more attention to the design and utilization of underground workpieces, such as underground storage rooms in residential quarters or high-rise buildings, underground parking lots, commercial areas. Underground shopping malls, pedestrian passages, subway tunnels, subway stations, etc. Due to the influence of climate change, geological conditions, design and construction and other factors, water seepage and water leakage in underground projects emerge in endlessly; especially in recent years, the climate has warmed, rainwater has increased, t...

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Problems solved by technology

However, the waterproof and impermeability of concrete given by existing admixtures is limited, and the use of small amounts cannot play a role, and excessive use of admixtures tends to disperse unevenly, which will also cause a series of problems, such as concrete strength decline, early cracking, local alkalinity Too large, reduced durability, etc., cannot meet the waterproof and anti-seepage requirements of underground engineering construction

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