Regenerated glass fiber reinforced plastic-polyvinyl alcohol hybrid fiber high-toughness concrete

Abstract

The invention provides regenerated glass fiber reinforced plastic-polyvinyl alcohol hybrid fiber high-toughness concrete. The concrete is prepared from the following raw materials in parts by weight: 800 to 1000 parts of cement, 30 to 50 parts of silica fume, 1200 to 1350 parts of fine aggregate, 1600 to 2000 parts of coarse aggregate, 10 to 20 parts of large-size regenerated glass fiber reinforced plastic fiber, 20 to 30 parts of medium-size regenerated glass fiber reinforced plastic fiber, 5 to 10 parts of small-size regenerated glass fiber reinforced plastic fiber, 6.3 to 7.5 parts of polyvinyl alcohol fiber, 6.5 to 8.5 parts of water reducing agent, 5.6 to 7.1 parts of defoaming agent, 300 to 400 parts of oxidant solution, 0.2 to 0.5 part of dispersing agent and 400 to 450 parts of water. Toughness is improved by improving binding power of the regenerated glass fiber reinforced plastic fiber in concrete and improving dispersity of the PVA fiber, an oxidizing agent is adopted to conduct surface oxidation treatment on the regenerated glass fiber reinforced plastic fibers, etching is conducted on the fiber surfaces, mechanical meshing is formed on the contact surface of the fibers and the concrete, hydrophilic groups exist in molecular chains of a dispersing agent, when the fibers are soaked in a dispersing agent aqueous solution, wetting of the fibers by water is facilitated, and dispersion is improved. The hybrid fiber concrete prepared by the method is simple in preparation process and convenient to construct, and can be widely applied to the fields of civil engineering, traffic and the like.

Description

technical field [0001] The invention relates to a recycled fiberglass-polyvinyl alcohol mixed fiber high-toughness concrete, which belongs to the technical field of building materials. Background technique [0002] Fiber-reinforced concrete is a cement-based composite material made of concrete as the matrix material and mixed with other fibers. Since the incorporation of a single fiber cannot meet the various indicators of concrete materials, most of them currently use two or more fibers, mainly high modulus fibers and low modulus fibers. High modulus fibers increase the compressive strength of concrete materials. , low modulus fibers inhibit concrete cracking, because steel fibers have good tensile strength, shear resistance, etc. can significantly improve the mechanical properties of concrete, and are widely used in fiber reinforced concrete. For example, the Chinese patent application number 201811207141.5 discloses a hybrid fiber concrete and its preparation method and ...

AI Technical Summary

Problems solved by technology

However, the cost of steel fiber itself is 10,000 yuan per ton, which increases the cost of fiber concrete. At the same time, steel fibers are easily corroded, and durability risks need to be considered

In addition, the polyvinyl alcohol fiber introduced in this patent is directly added before adding the mixed solution. Since the fiber is bundled, it is not easy to disperse evenly in the concrete, which will affect the strength of the concrete.

Images