Frost resistance and microstructure of Engineered Cementitious Composites: Influence of fly ash and micro poly-vinyl-alcohol fiber

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dc.authoridLi, Victor/0000-0002-8678-3493
dc.contributor.authorSahmaran, Mustafa
dc.contributor.authorOzbay, Erdogan
dc.contributor.authorYucel, Hasan E.
dc.contributor.authorLachemi, Mohamed
dc.contributor.authorLi, Victor C.
dc.date.accessioned2024-09-18T20:16:55Z
dc.date.available2024-09-18T20:16:55Z
dc.date.issued2012
dc.departmentHatay Mustafa Kemal Üniversitesien_US
dc.description.abstractOne of the most damaging environmental conditions to concrete structure is cyclic freezing and thawing. This paper discusses the influence of the high volumes of fly ash (FA) and micro poly-vinyl-alcohol (PVA) fibers on the cyclic freeze-thaw resistance and microstructure of the Engineered Cementitious Composites (ECC). ECC mixtures with two different FA-cement (FA/C) ratios (1.2 and 2.2 by weight), and at constant water-cementitious materials (fly ash and cement) ratio of 0.27 are prepared. To compare the behavior of ECC with ECC matrix, all of the preceding properties are also investigated for ECC matrix mixtures of same composition without PVA fiber. For frost resistance, mixtures are exposed to the freeze and thaw cycles up to 300 cycles in accordance with ASTM C666, Procedure A. Experimental tests consist of measuring the residual mechanical properties (flexural strength, mid-span beam deflection and flexural stress - deflection curve), ultrasonic pulse velocity and mass loss. The roles of PVA fibers and FA are discussed through the analysis of microstructure and fiber-matrix interactions as function of frost exposure. The microstructural characterization by measuring pore size distributions is examined before and after exposure to frost deterioration by using mercury intrusion porosimetry (MIP). The air-void characteristics of mixtures are also studied using linear transverse method. Test results confirm that both ECC mixtures with high volumes of FA remain durable, and show a tensile strain capacity of more than 2% even after 300 freezing and thawing cycles. On the other hand, before completing 300 freezing and thawing cycles, matrix (ECC without fiber) specimens have severely deteriorated, requiring removal from the freezethaw machine. Therefore, results indicate that the addition of micro PVA fiber to the ECC matrix substantially improved the frost resistance. The results of freeze-thaw tests also indicated that the reduction of residual physical and mechanical properties with increasing number of freeze-thaw cycles is relatively more for ECC mixture with FA/C ratio of 2.2 than for ECC mixture with FA/C ratio of 1.2. (C) 2011 Elsevier Ltd. All rights reserved.en_US
dc.description.sponsorshipScientific and Technical Research Council (TUBITAK) of Turkey [MAG-108M495]; Gaziantep University Scientific Research Centre [MF.10.09]; Higher Education Council of Turkey (YOK)en_US
dc.description.sponsorshipThe authors gratefully acknowledge the financial assistance of the Scientific and Technical Research Council (TUBITAK) of Turkey provided under Project: MAG-108M495, Gaziantep University Scientific Research Centre provided under Project: MF.10.09 and Higher Education Council of Turkey (YOK).en_US
dc.identifier.doi10.1016/j.cemconcomp.2011.10.002
dc.identifier.endpage165en_US
dc.identifier.issn0958-9465
dc.identifier.issn1873-393X
dc.identifier.issue2en_US
dc.identifier.scopus2-s2.0-84655162723en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage156en_US
dc.identifier.urihttps://doi.org/10.1016/j.cemconcomp.2011.10.002
dc.identifier.urihttps://hdl.handle.net/20.500.12483/9807
dc.identifier.volume34en_US
dc.identifier.wosWOS:000300545500005en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofCement & Concrete Compositesen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectEngineered Cementitious Composites (ECC)en_US
dc.subjectFrost resistanceen_US
dc.subjectFly ashen_US
dc.subjectPVA fibersen_US
dc.subjectMicrostructureen_US
dc.titleFrost resistance and microstructure of Engineered Cementitious Composites: Influence of fly ash and micro poly-vinyl-alcohol fiberen_US
dc.typeArticleen_US

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