Pervious straw fiber concrete and production method thereof

Abstract

The invention provides a pervious straw fiber concrete and a production method thereof. The method comprises the following steps: unwinding plant straws into dispersed straw fibers, carrying out alkali liquor steam curing on the straw fibers and silica micro-powder to form silica micro-powder coated modified straw fibers, and uniformly mixing the silica micro-powder coated modified straw fibers with high-calcium fly ash, fine aggregates, a water reducer and water to obtain the pervious straw fiber concrete. Steam oxygen of gaseous oxidation aggregated silica micro-powder makes the gel coated straw fibers have good dispersibility, permeability and thickening property, and the modified fibers formed by the coated straw fibers have a thickening property, so a formed straw fiber network has good water permeability, the adhesion force between a cement mortar and the fine aggregates and between the cement mortar and the straw fibers is enhanced, and the strength of the concrete is greatly improved; and the method effectively recovers agriculture and forestry straws, and realizes the high-value comprehensive utilization of solid wastes.

Description

technical field [0001] The invention relates to the field of building materials, in particular to the preparation of pervious concrete, in particular to a straw fiber permeable concrete and a preparation method thereof. Background technique [0002] In the design and construction of urban facilities such as traditional urban roads, sidewalks, squares, etc., it has always been emphasized that it should be dense and impervious. This material, especially when used on the ground, will bring a lot of harm to the urban environment, such as poor drainage, increasing the burden on drainage facilities, impermeable road surface is difficult to exchange heat and moisture with the air, lack of control of urban surface temperature and humidity The ability to regulate, resulting in the "heat island phenomenon" and so on. In order to overcome the shortcomings of traditional concrete, people have researched and developed permeable concrete. [0003] Permeable concrete, also known as porou...

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Problems solved by technology

[0010] Aiming at the shortcomings of permeable concrete, which is widely used at present, such as low strength, inability to withstand high-strength loads, high requirements for roadbeds, difficult construction, easy blocking of cement paste and fine aggregates to reduce water seepage capacity, and easy to cause freezing damage, etc., this paper The invention proposes a straw fiber permeable concrete and its preparation method, thereby effectively improving the strength of the permeable concrete, ensuring the convenience of construction, and effectively realizing the high-value comprehensive utilization of solid waste

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