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

A high-performance fiber, strength grade technology, used in high-performance fiber-reinforced concrete and its preparation, high-toughness and high-durability concrete, high-strength fields, can solve the problems of poor durability, easy cracking, high brittleness, etc., to improve mechanical properties. , the effect of increasing cohesion and inhibiting plastic shrinkage

Active Publication Date: 2017-12-26
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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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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  • High-performance fibrous concrete of C130 strength level and preparation method thereof
  • High-performance fibrous concrete of C130 strength level and preparation method thereof

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[0041] In the following, the present invention will be further described in detail by using examples in combination with specific embodiments, so as to make the advantages of the present invention easier to be understood by those skilled in the art, but it is not intended to limit the protection scope of the present invention.

[0042] The high-performance fiber concrete of the C130 strength grade of the present invention is prepared by the following method:

[0043] 1) Add 12-13 parts of water reducing agent and 27-29 parts of hydroxyl-modified carbon nanotube dispersion to 25% of the total water, which is recorded as aqueous solution 1; weigh 2.3-2.5 parts of defoamer Added to water with 25% total water content, recorded as aqueous solution 2;

[0044] 2) Add 720-750 parts of river sand, 1010-1050 parts of gravel, and 1.1-1.8 parts of cellulose fiber into the mixer according to the mass ratio, and stir evenly for 2-3 minutes;

[0045] 3) Then, add 450-470 parts of cement, 6...

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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...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B16/02C04B18/10C04B14/02
CPCC04B14/026C04B16/02C04B18/101C04B28/04C04B2201/50C04B22/002C04B14/02C04B14/068C04B18/08C04B18/146C04B2103/302C04B22/147C04B22/124C04B24/122C04B2103/50Y02W30/91
Inventor 郑山锁董立国董方园郑捷蔡永龙刘巍秦卿宋明辰王斌尚志刚阮升郑淏
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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