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Method for improving dynamic characteristics of concrete by applying multi-scale fiber structure body

A technology of dynamic characteristics and structure, applied in the field of concrete processing, can solve the problems of poor interface performance of carbon fiber surface, and achieve the effect of good dispersion, improved concrete strength and dynamic strength.

Inactive Publication Date: 2020-12-22
AIR FORCE UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method of using multi-scale fiber structure to improve the dynamic properties of concrete, which effectively solves the problem of poor performance of carbon fiber surface interface and improves the quality of concrete

Method used

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  • Method for improving dynamic characteristics of concrete by applying multi-scale fiber structure body
  • Method for improving dynamic characteristics of concrete by applying multi-scale fiber structure body
  • Method for improving dynamic characteristics of concrete by applying multi-scale fiber structure body

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A method of using a multi-scale fiber structure to improve the dynamic properties of concrete, comprising the steps of:

[0031] (1) Weighing of raw materials:

[0032] Take the following raw materials by corresponding parts by weight for subsequent use:

[0033] Cement 364.00kg, silica fume 25.20kg, fly ash 125.00kg, sand 691.00kg, gravel 1032.00kg, water 175.00kg, water reducing agent 5.10kg, multi-scale fiber structure 2.95kg;

[0034] (2) Preparation of multi-scale fiber structure water dispersion solution:

[0035] Mix the water weighed in step (1) with the water reducer, then add the multi-scale fiber structure, and then add sodium lauryl sulfate, and ultrasonically disperse for 15 minutes. After 15 minutes, the multi-scale fiber structure water dispersion solution is ready for use; The add-on of described sodium lauryl sulfate is 1% of water gross mass;

[0036] (3) Preparation of multi-scale fiber structure cement mortar:

[0037] Mix and stir the cement, si...

Embodiment 2

[0051] A method of using a multi-scale fiber structure to improve the dynamic properties of concrete, comprising the steps of:

[0052] (1) Weighing of raw materials:

[0053] Take the following raw materials by corresponding parts by weight for subsequent use:

[0054] Cement 370.00kg, silica fume 27.50kg, fly ash 129.00kg, sand 705.00kg, gravel 1045.00kg, water 178.00kg, water reducing agent 5.20kg, multi-scale fiber structure 3.31kg;

[0055] (2) Preparation of multi-scale fiber structure water dispersion solution:

[0056] Mix the water weighed in step (1) with the water reducer, then add the multi-scale fiber structure, and then add sodium lauryl sulfate, and ultrasonically disperse for 15 minutes. After 15 minutes, the multi-scale fiber structure water dispersion solution is ready for use; The add-on of described sodium lauryl sulfate is 1.3% of water gross mass;

[0057] (3) Preparation of multi-scale fiber structure cement mortar:

[0058] Mix and stir the cement, ...

Embodiment 3

[0072] A method of using a multi-scale fiber structure to improve the dynamic properties of concrete, comprising the steps of:

[0073] (1) Weighing of raw materials:

[0074] Take the following raw materials by corresponding parts by weight for subsequent use:

[0075] Cement 375.00kg, silica fume 28.50kg, fly ash 134.00kg, sand 712.00kg, gravel 1058.00kg, water 180.00kg, water reducing agent 5.40kg, multi-scale fiber structure 3.68kg;

[0076] (2) Preparation of multi-scale fiber structure water dispersion solution:

[0077] Mix the water weighed in step (1) with the water reducer, then add the multi-scale fiber structure, and then add sodium lauryl sulfate, and ultrasonically disperse for 15 minutes. After 15 minutes, the multi-scale fiber structure water dispersion solution is ready for use; The add-on of described sodium lauryl sulfate is 1.5% of water gross mass;

[0078] (3) Preparation of multi-scale fiber structure cement mortar:

[0079] Mix and stir the cement, ...

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Abstract

The invention discloses a method for improving dynamic characteristics of concrete by applying a multi-scale fiber structure body, and belongs to the technical field of concrete processing. The methodcomprises the following steps: (1) weighing raw materials; (2) preparing a multi-scale fiber structure body aqueous dispersion solution; (3) preparing multi-scale fiber structure body cement mortar;(4) preparing a multi-scale fiber structure body concrete mixture; and (5) preparing multi-scale fiber structure body reinforced concrete. After nano-scale carbon nanotubes are grafted to the surfacesof micro-scale carbon fibers, a multi-level multi-scale fiber reinforcement is formed and can be well bonded with concrete in a concrete matrix, so that the development of concrete cracks is reduced,the strength of the concrete is improved, the dynamic strength of the prepared concrete is obviously improved, the maximum dynamic growth factor of the concrete reaches 1.95, and the strength of theconcrete is equivalently increased by one time.

Description

technical field [0001] The invention belongs to the technical field of concrete processing, and in particular relates to a method for improving the dynamic characteristics of concrete by using a multi-scale fiber structure. Background technique [0002] In recent years, with the rapid growth of my country's economic strength, more and more large-scale infrastructure projects have been launched one after another. On October 23, 2018, the Hong Kong-Zhuhai-Macao Bridge was officially opened to traffic, with a total length of 55 kilometers. After 13 years of demonstration, design, and construction, the total investment amount was about 120 billion; my country's high-speed rail industry is also developing rapidly. According to relevant reports, in 2019 the high-speed rail The total mileage has exceeded 30,000 kilometers. The development of these large-scale infrastructure projects is inseparable from the progress of concrete material science. Due to the sensitivity of the strain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/38C04B14/02
CPCC04B14/026C04B14/386C04B28/04C04B2201/50C04B18/146C04B18/08C04B14/06C04B18/12C04B22/002C04B2103/302C04B24/16
Inventor 陆松白二雷许金余杜纯杜宇航黄河夏伟
Owner AIR FORCE UNIV PLA
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