High-performance fibrous concrete of C130 strength level and preparation method thereof

Abstract

The invention discloses high-performance fibrous concrete of a C130 strength level and a preparation method thereof. The concrete comprises the following components in parts by mass: 450-470 parts of cement, 100-110 parts of water, 720-750 parts of river sand, 1010-1050 parts of gravel, 60-95 parts of fly ash, 50-70 parts of rice hull ash, 50-70 parts of silica fume, 12-13 parts of water reducing agent, 14-15 parts of activator, 1.1-1.8 parts of cellulose fiber, 27-29 parts of hydroxyl modified carbon nanotube dispersion liquid and 2.3-2.5 parts of defoamer. The prepared concrete has high toughness and excellent durability, and has high binding strength with section steel. When the concrete is used in a steel reinforced concrete composite structure, the cooperative work performance between the section steel and the concrete can be effectively achieved, thereby compensating for defects that the binding performance between the section steel and the concrete is poor and the mechanical properties of each of the both can not be fully displayed.

Description

technical field [0001] The invention belongs to the field of new building materials, and is a high-strength, high-toughness and high-durability concrete mixed with rice husk ash, cellulose fibers and modified carbon nanotubes, and specifically relates to a high-strength C130 strength grade concrete with high toughness. Performance fiber concrete and method for its preparation. Background technique [0002] Ordinary concrete and cement-based materials have low tensile strength and poor toughness, and a large number of micro-cracks will occur during hardening or under external loads, which seriously affect the durability of concrete or cement-based composite structures and reduce the service life of structures. In order to overcome the brittleness of ordinary concrete and high-performance concrete, asbestos fibers, steel fibers, carbon fibers, polyvinyl alcohol fibers, polypropylene fibers, and basalt fibers with toughening effects are used in concrete. The use of a large num...

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of high-performance fiber concrete of C130 intensity grade and preparation method thereof, and the present invention uses cellulose fiber, rice husk ash, modified carbon nanotube, cement, fly ash, river sand, crushed stone for the first time , chemical admixtures (including water reducer, activator, defoamer), and water prepared a fiber high performance concrete with high volume stability, high toughness, high durability, and ultra-high strength C130 strength level, overcoming It overcomes the shortcomings of ordinary concrete, such as high brittleness, easy cracking, and poor durability.

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