High-performance fiber concrete with C110 strength grade and preparation method thereof

Abstract

The invention discloses high-performance fiber concrete with a C110 strength grade and a preparation method thereof. The concrete is prepared from the following components in parts by mass: 425 to 450 parts of cement, 120 to 130 parts of water, 710 to 730 parts of river sand, 1000 to 1030 parts of crushed stones, 60 to 90 parts of fly ash, 40 to 60 parts of rich husk ash, 40 to 60 parts of silicon ash, 9 to 10 parts of a water reducing agent, 13 to 14 parts of an exciting agent, 1.1 to 1.8 parts of cellulose fibers, 20 to 23 parts of a hydroxyl-modified carbon nanotube dispersion solution and 2.2 to 2.4 parts of a de-foaming agent. The concrete prepared by the preparation method has relatively high toughness and excellent durability and has relatively high bonding strength with section steel. The high-performance fiber concrete is used in a section steel concrete composite structure and can effectively express cooperative work performance between the section steel and the concrete; the disadvantages that the bonding performance of the section steel and the concrete is poor and respective mechanical properties of the section steel and the concrete cannot be sufficiently expressed are overcome.

Description

Technical field [0001] The invention belongs to the field of new building materials. It 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-toughness C110 strength grade high Performance fiber concrete and its preparation method. Background technique [0002] Ordinary concrete and cement-based materials have low tensile strength and poor toughness. A large number of micro-cracks will occur during the hardening process or under external loads, which will seriously affect the durability of the concrete or cement-based composite structure and reduce the service life of the structure. 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, which have a toughening effect, are used in concrete with longer fibers. The large...

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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 C110 intensity level and preparation method thereof, 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 C110 strength level, overcoming It overcomes the shortcomings of ordinary concrete, such as high brittleness, easy cracking, and poor durability.

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