|Table of Contents|

Effect of Fiber Content on Fluidity and Mechanical Properties of Recycled Brick Powder ECC(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2021年05期
Page:
74-82
Research Field:
Publishing date:

Info

Title:
Effect of Fiber Content on Fluidity and Mechanical Properties of Recycled Brick Powder ECC
Author(s):
YUAN Cheng-fang;  WANG Di;  LI Hao-fei;  ZHANG Zhe
(School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China)
Keywords:
recycled brick powder;  ECC;  PVA fiber;  fluidity;  mechanical property
PACS:
TU528
DOI:
10.19815/j.jace.2021.03080
Abstract:
In order to better grasp the working performance and mechanical properties of recycled brick powder engineered cementitious composites(ECC), and provide basis and reference for the research and promotion of recycled brick powder ECC, the effect of polyvinyl alcohol(PVA)fiber content on the flow properties and mechanical properties of recycled brick powder ECC was analyzed through experimental research. The results show that the replacement of quartz sand by recycled brick powder weakens the mechanical properties of ECC to a certain extent. In the range of 1.25%-2.0%, as the volume of fiber content increases, the fluidity of the recycled brick powder ECC mixture decreases. The flexural strength increases firstly and then decreases, and when the fiber content is 1.75%, the flexural strength is the largest. The compressive strength decreases with the increase of fiber content, and the decrease is the most obvious in the range of 1.5%-1.75%. The squeeze ratio keeps decreasing and the material flexibility increases. The bending strength, bending cracking deflection and ultimate deflection increase with the increase of fiber content, showing better toughness and ductility.The tensile cracking strain and ultimate strain continue increasing with the increase of fiber content, and the tensile strain hardening characteristics are obvious. There is a good linear correlation between the ultimate mid-span deflection in four point bending test and the ultimate strain in uniaxial tensile test of recycled brick powder ECC.

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Last Update: 2021-09-01