Please use this identifier to cite or link to this item: https://scholarhub.balamand.edu.lb/handle/uob/7453
Title: Mechanical and durability properties of polymer fiber reinforced one-part foam geopolymer concrete: A sustainable strategy for the recycling of waste steel slag aggregate and fly ash
Authors: Ahıskalı, Adem
Ahıskalı, Mehtiali
Bayraktar, Oğuzhan Yavuz
Kaplan, Gökhan
Assaad, Joseph 
Affiliations: Department of Civil and Environmental Engineering 
Keywords: Durability
Foam concrete
Polymer fibers
Recycling
Sustainability
Waste slag aggregate
Issue Date: 2024-08-23
Publisher: Elsevier
Part of: Construction and Building Materials
Volume: 440
Abstract: 
This paper assesses the feasibility of geopolymers (GPs) for use as lightweight foamed concrete, a crucial step towards reducing the carbon footprint and conserving natural resources. A powder activator (i.e., sodium metasilicate) less harmful to the environment was used to activate the fly ash-based GPs, while the limestone aggregates were gradually replaced by up to 100 % waste slag materials to conserve natural resources. Polypropylene fibers were incorporated at high dosage rates of 1 % or 2 %, by volume, to reduce the concrete density and improve its durability properties. Tested properties include flow, density, water absorption, porosity, thermal conductivity, mechanical strengths, drying shrinkage, and resistance to sulfate attack, freeze/thaw cycles, and elevated temperature. Results showed that the concrete mechanical properties improved when the limestone aggregate was replaced by slag materials, but the density and thermal conductivity were slightly curtailed at higher addition rates. The use of polypropylene fibers proved efficient to improve the resistance to freeze/thaw cycles, drying shrinkage, and expansion due to sulphate attack. Such data can help sustain the green building industry development by reducing the carbon footprint and conserving natural resources in foamed concrete applications.
URI: https://scholarhub.balamand.edu.lb/handle/uob/7453
ISSN: 09500618
DOI: 10.1016/j.conbuildmat.2024.137492
Ezproxy URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Civil and Environmental Engineering

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