Basalt and polypropylene hybrid fiber reinforced concrete and preparing method

Abstract

The invention provides basalt and polypropylene hybrid fiber reinforced concrete and a preparing method. Basalt fibers accounting for 0.1-0.5 part of the weight of a concrete matrix and polypropylene fibers accounting for 0.01-0.08 part of the weight of the concrete matrix are doped into the concrete matrix. (1) at the normal temperature, sand and stone are put into a blender to be blended for 60 s; (2) cement is put into the blender to be blended for 60 s; (3) water is added into the blender to be blended for 90 s to 120 s, and a concrete matrix is obtained; and (4) two kinds of fibers including the basalt fibers and the polypropylene fibers are mixed, and are scattered into the concrete matrix obtained in the step (3) to be blended for 120 s after the two kinds of fibers are highly scattered, and then the basalt and polypropylene hybrid fiber reinforced concrete is obtained. Compared with traditional concrete, the basalt and polypropylene hybrid fiber reinforced concrete can better adapt to complex environments such as high temperature, high heat, corrosion and the like, can be widely applied to roads, bridges, buildings, undergrounds and oceanographic engineering, and the concrete application scope is greatly expanded.

Description

technical field [0001] The invention relates to a modified concrete, and also relates to a preparation method of the modified concrete. Specifically, it is a fiber-modified concrete and a preparation method thereof. Background technique [0002] Concrete has the advantages of strong plasticity, good integrity, good fire resistance, low price, and low energy consumption. Sand, stone and other constituent materials are easy to obtain locally, and industrial waste such as slag and fly ash can be used as mineral additives to replace part of cement. Conducive to protecting the ecological environment. However, concrete is a quasi-brittle material with very low tensile strength, and its composition also determines its own shortcomings such as heavy weight and poor ductility. Moreover, with the passage of time, material aging and structural performance deterioration occur inside the concrete structure. This irreversible process will lead to a decrease in the structural bearing cap...

AI Technical Summary

Problems solved by technology

The incorporation of fibers has significantly improved the toughness, failure mode, erosion resistance, wear resistance and other aspects of concrete, but there are great limitations in durability and project cost.

[0004] In the technical solution disclosed in the patent document with the publication number CN1686906A and the name "High Performance Hybrid Fiber Reinforced Concrete", the fibers used are carbon fibers and steel fibers, among which the use of carbon fibers to increase strength is not only expensive but also difficult to adapt to large-scale use in engineering , steel fiber not only has the fatal problem of easy corrosion, but also indirectly increases the cost of the project when it is used in a large amount, and it is difficult to promote it in large quantities; the patent document with the publication number CN102584137A and the name "A Preparation Method for Multi-component Low Elastic Modulus Hybrid Fiber Reinforced Recycled Concrete" In the disclosed technical solution, the main purpose is waste utilization, and the improvement of the performance of concrete itself is small. The low elastic modulus fiber used can only play a crack-resistant effect in the early stage of concrete hardening, and the contribution of strength is small, and the durability is limited. performance is not mentioned

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