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Pro129

WATER TRANSPORT IN POLYVINYL ALCOHOL FIBER REINFORCED GEOPOLYMER COMPOSITES



Author(s): Chen Shen, Xiaomei Wan, Tiejun Zhao and Yu Lu
Paper category: Proceedings
Book title: Proceedings of the 2nd International Conference on UHPC Materials and Structures (UHPC2018-China)
Editor(s): Caijun Shi and Baochun Chen
ISBN: 978-2-35158-219-0
e-ISBN: 978-2-35158-220-6
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 456-468
Total Pages: 13
Language : English


Abstract: The ordinary Portland cement-based concrete suffer from brittleness and potential of
cracking, which generally accompany with degradation of durability. Many studies have
shown that the water transport properties of concrete are related to its durability closely. In
this paper, the basic mechanical properties involving strengths, stress-strain diagrams and
other indexes during uniaxial tension, four-point bending and compression of Polyvinyl
Alcohol (PVA) fiber reinforced geopolymer composites were investigated, so does the water
transport in specimens before and after loading. It can be found that PVA fiber reinforced
geopolymer composites exhibit obvious characteristics of strain hardening. A lot of micro
cracks arise in specimen associated with increased tensile or bending deformation. These
micro cracks, whose width is less than 100 μm, can effectively prevent water from penetrating
too quickly as the results shown. And PVA fiber can improve the flexural response, toughness.
As the same time, the effects of different fiber content and different fly ash content on water
transport are compared. The research findings show that the permeability coefficient of PVA
fiber reinforced geopolymer composites decreases with the increase of fiber content. The
content of fly ash also has an important influence on the permeability coefficient of PVA fiber
reinforced geopolymer composites.


Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00


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