Review
Version 1
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Role of Fly Ash in Concrete Construction Industry
Version 1
: Received: 20 January 2023 / Approved: 24 January 2023 / Online: 24 January 2023 (10:25:08 CET)
How to cite: Akhnoukh, A. Role of Fly Ash in Concrete Construction Industry. Preprints 2023, 2023010429. https://doi.org/10.20944/preprints202301.0429.v1 Akhnoukh, A. Role of Fly Ash in Concrete Construction Industry. Preprints 2023, 2023010429. https://doi.org/10.20944/preprints202301.0429.v1
Abstract
This paper discusses the use of fly ash in concrete construction industry. Fly ash is incorporated as a supplementary cementitious material (SCM) in ordinary Portland cement (OPC) concrete in partial replacement of cement, and is recently used as a geopolymer cement in the development of geopolymer concrete (GPC) mixes. Class C and Class F fly ash high aluminosilicate content, and fine granular size contributes to concrete improved workability, lower permeability, and reduced heat of cement hydration. Due to its chemical properties, the use of fly ash in producing OPC and GPC results in increased compressive strength, higher tensile strength evaluated by measuring hardened concrete modulus of rupture (MOR), and higher modulus of elasticity (MOE). The fine size of fly ash particles increases the concrete mix packing order, and reduce the ingress of moisture, and mitigates the impact of aggressive environmental attacks through the reduction of sulfates and chlorides rate of concrete penetration. Thus, fly ash improves concrete resistivity to alkali-aggregate reactions (AAR), and reduces the corrosion of reinforcing steel, and prestressing strands. Fly ash as an economic byproduct of coal industry results in reduced material cost, increased durability, and a higher sustainability of concrete construction projects.
Keywords
supplementary cementitious materials; fly ash; pozzolan; binder; Portland cement; geopolymers; concrete; cement
Subject
Engineering, Architecture, Building and Construction
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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