Fiber concrete and preparation method thereof

Abstract

The invention relates to the technical field of concrete, in particular to a preparation method of fiber concrete. The preparation method comprises the following steps: 1, performing strong acid soaking treatment on plant fibers, then performing strong alkali soaking treatment, and performing shearing and drying to obtain pretreated fibers; 2, the pretreated fibers are weighed and soaked in a water-retaining agent, stirring is conducted for 1-1.5 h, then an antioxidant is added, uniform mixing, heating and stirring are conducted, and modified plant fibers are obtained; 3, the recycled aggregate, the water reducing agent, the inorganic filler, the defoaming agent, the cement, the water, the corrosion inhibitor and the surfactant are weighed and evenly mixed with the modified plant fibers, stirring is conducted for 40-80 min, fiber concrete slurry is obtained, the fiber concrete slurry is poured into a mold to be fixed and formed, and the fiber concrete is obtained and has the good anti-cracking effect.

Description

technical field [0001] The present application relates to the technical field of concrete, and more particularly, to a fiber concrete and a preparation method thereof. Background technique [0002] Fiber reinforced concrete is a cement-based composite material composed of cement slurry, mortar or concrete as the base material and fiber as the reinforcing material. Due to the high tensile strength and elongation of fibers, the tensile, flexural, impact strength, elongation and toughness of concrete can be improved. [0003] At present, the fiber filling used in concrete mainly includes natural fibers, glass fibers, polypropylene fibers and steel fibers. Among them, the cost of steel fibers is high and the construction difficulty is relatively large. Compared with natural fibers, glass fibers and polypropylene fibers are more difficult to fill. The price is high, so natural fibers are used, but natural fibers are light in weight and are not easy to be filled, so that the natu...

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Problems solved by technology

[0003] At present, the fiber filling used in concrete mainly includes natural fiber, glass fiber, polypropylene fiber and steel fiber, etc. Among them, the cost of steel fiber is high and the construction difficulty is relatively large; glass fiber and polypropylene fiber are compared with natural fiber. The price is high, so natural fibers are used, but natural fibers are light and not easy to fill, which makes the filling of natural fibers uneven and reduces the strength of concrete. At the same time, after long-term exposure of concrete, the temperature of concrete increases and water loss , thereby accelerating the aging of natural fibers, reducing the toughening effect of natural fibers, and causing concrete to crack easily

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