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High-strength fiber-reinforced cement-based composite material as well as preparation method and application thereof

A high-strength fiber and cement-reinforced technology, which is applied in the field of building materials, can solve problems such as increased risk of bridge deck system cracking, poor synergistic workability, and poor high-temperature resistance, and achieve good synergistic workability, fast setting speed, and good Effects of Composite Adaptability

Inactive Publication Date: 2020-05-08
CHINA JINGYE ENG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the continuous popularization and application of ECC, the shortcomings of large material shrinkage and poor high temperature resistance have gradually become prominent, and cracks even occur before the structure bears the load.
Although the crack width is controlled after cracking, the cracking risk of the bridge deck system is increased, and the interoperability with other materials is significantly worse

Method used

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  • High-strength fiber-reinforced cement-based composite material as well as preparation method and application thereof
  • High-strength fiber-reinforced cement-based composite material as well as preparation method and application thereof
  • High-strength fiber-reinforced cement-based composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A high-strength fiber-reinforced cement-based composite material, which is made of cement, fly ash, silica fume, slag, water reducer, fine sand, fiber and water, wherein cement, fly ash, silica fume, slag, The total mass percentage of water reducer, fine sand and fiber is 90.4%, and the total mass percentage of water is 9.6%.

[0032] The cement is rapid-hardening sulfoaluminate cement with a strength grade of 42.5; the fly ash is the first-class low-calcium fly ash; the silica fume is the micro-silica fume produced by Gansu Sanyuan Silicon Material Co., Ltd.; the slag is S95 granulated blast furnace Slag; superplasticizer is polycarboxylate high-efficiency superplasticizer; fine sand is 100-200 mesh quartz sand; polyvinyl alcohol fiber is produced by Japan Kuraray Company, with a length of 12mm, a diameter of 39μm, a tensile strength of 2750MPa, and an elastic modulus 210GPa; the steel fiber is produced by Anshan Iron and Steel Plant, with a length of 13mm, a diameter ...

Embodiment 2

[0039] A high-strength fiber-reinforced cement-based composite material, which is made of cement, fly ash, silica fume, slag, water reducer, fine sand, fiber and water, wherein cement, fly ash, silica fume, slag, The total mass percentage of water reducer, fine sand and fiber is 93.0%, and the mass percentage of water is 7.0%.

[0040] The cement is rapid-hardening sulfoaluminate cement with a strength grade of 42.5; the fly ash is the first-class low-calcium fly ash; the silica fume is the micro-silica fume produced by Gansu Sanyuan Silicon Material Co., Ltd.; the slag is S95 granulated blast furnace Slag; superplasticizer is polycarboxylate high-efficiency superplasticizer; fine sand is 100-200 mesh quartz sand; polyvinyl alcohol fiber is produced by Japan Kuraray Company, with a length of 12mm, a diameter of 39μm, a tensile strength of 2750MPa, and an elastic modulus 210GPa; the steel fiber is produced by Anshan Iron and Steel Plant, with a length of 13mm, a diameter of 0.2...

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Abstract

The invention belongs to the technical field of building materials, and discloses a high-strength fiber-reinforced cement-based composite material as well as a preparation method and application thereof. The composite material is formed by mixing, by mass, 85%-92% of a dry material and 8%-15% of water and is applied to steel bridge deck pavement, and the dry material comprises cement, fly ash, silicon powder, slag, a water reducing agent, fine sand and fibers. The material provided by the invention has the performance characteristics of high setting speed, high strength, high ductility, low shrinkage and high temperature resistance, and has good cooperative workability with steel.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-strength fiber-reinforced cement-based composite material and its preparation method and application. Background technique [0002] Concrete is a quasi-brittle material with heavy weight, low tensile strength, easy cracking and high brittleness. When the material is subjected to excessive tensile stress, the strain gradually softens, and usually only a small number of cracks with large spacing can be formed in components or structures. , the deformation is concentrated at the crack, and the width of the crack can reach more than 1.0mm, especially in the pavement, bridge deck and other components, especially under the combined action of load and environmental factors. [0003] In order to improve the brittleness of concrete, Professor Victor Li used mesoscopic mechanics to design concrete materials and developed a fiber-reinforced cementitious composite material,...

Claims

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Application Information

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IPC IPC(8): C04B28/06
CPCC04B28/06C04B2201/50C04B18/08C04B18/146C04B18/141C04B2103/302C04B14/06C04B16/0641C04B14/48
Inventor 韩宇栋王庆丁小平宋涛文
Owner CHINA JINGYE ENG
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