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Effects of Repeated Wet-Dry Cycles on Compressive Strength of Fly-Ash Based Recycled Aggregate Geopolymer Concrete (RAGC)

Geopolymer concrete (GC) is a sustainable construction material and a great
alternative to regular concrete. GC is a zero-cement material made from a combination of
aluminate, silicate and an activator to produce a binder-like substance.
This investigation focused on the effects of wet and dry cycles on the strength and
durability of fly ash-based recycled aggregate geopolymer concrete (RAGC). The wet-dry
cycles were performed approximately according to ASTM D559 standards.
RAGC specimens with nearly 70% recycled materials (recycled aggregate and fly
ash) achieved a compressive strength of approximately 3600 psi, after 7 days of heat curing
at 60ºC. Although the recycled aggregate is prone to high water absorption, the
compressive strength decreased by only 4% after exposure to 21 wet-dry cycles, compared
to control specimens that were not exposed to the same conditions. Accordingly, the RAGC
material developed in this study can be considered as a promising environmentally friendly
alternative to cement-based regular concrete. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2018. / FAU Electronic Theses and Dissertations Collection

Identiferoai:union.ndltd.org:fau.edu/oai:fau.digital.flvc.org:fau_40832
ContributorsMendelson, Monica (author), Sobhan, Khaled (Thesis advisor), Florida Atlantic University (Degree grantor), College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
PublisherFlorida Atlantic University
Source SetsFlorida Atlantic University
LanguageEnglish
Detected LanguageEnglish
TypeElectronic Thesis or Dissertation, Text
Format114 p., application/pdf
RightsCopyright © is held by the author, with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder., http://rightsstatements.org/vocab/InC/1.0/

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