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Combined influence of nano‐CaCO 3 and polyvinyl alcohol fibers on fresh and mechanical performance of concrete incorporating fly ash
Author(s) -
Zhang Peng,
Zheng Yuanxun,
Wang Kejin,
Zhang Kaixuan
Publication year - 2020
Publication title -
structural concrete
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.912
H-Index - 34
eISSN - 1751-7648
pISSN - 1464-4177
DOI - 10.1002/suco.201900134
Subject(s) - flexural strength , polyvinyl alcohol , materials science , compressive strength , composite material , slump , fiber , elastic modulus , properties of concrete , flexural modulus , portland cement , nano , cement
In this investigation, the combined influence of polyvinyl alcohol (PVA) fibers and nano‐CaCO 3 particles on fresh and mechanical performance of concrete containing fly ash was assessed. In the concrete, Portland cement was replaced with 1, 2, 3, and 4% (by weight) of nano‐CaCO 3 . PVA fibers were added to the concrete at a dosage of 0.05, 0.10, 0.15, and 0.2% (by volume). The flowability of the fresh concrete was assessed using slump and slump flow measurements. The mechanical properties of the concrete evaluated included compressive and flexural strength as well as elastic modulus under both compression and flexure conditions. Our results showed that the workability of the concrete decreased with increases in nano‐CaCO 3 and PVA fiber content. When the dosage of nano‐CaCO 3 was no more than 3%, the flexural and compressive elastic modulus, flexural, and compressive strength of the concrete increased with nano‐CaCO 3 content. However, these mechanical property values decreased when the dosage of nano‐CaCO 3 increased from 3 to 4%. When the fiber content was less than 0.15%, the compressive and flexural strength and elastic modulus of the concrete increased with fiber content. However, these values began to decrease as the PVA fiber dosage increased from 0.15 to 0.2%.