Effect of Fly Ash on the Durability Properties of High Strength Concrete
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Abstract Utilization of fly ash as a supplementary cementitious material adds sustainability to concrete by reducing the CO2 emission of cement production. The positive effects of fly ash as a partial replacement of cement on the durability of concrete are recognized through numerous researches; however, the extent of improvement depends on the properties of fly ash. In this study, durability properties of high strength concrete utilizing high volume Class F fly ash sourced from Western Australia have been investigated. Concrete mixtures with fly ash as 30% and 40% of total binder were used to cast the test specimens. The compressive strength, drying shrinkage, sorptivity and rapid chloride permeability of the fly ash and control concrete specimens were determined. The 28-day compressive strength of the concrete mixtures varied from 65 to 85 MPa. The fly ash concrete samples showed less drying shrinkage than the control concrete samples when designed for the same 28-day compressive strength of the control concrete. Inclusion of fly ash reduced sorptivity and chloride ion permeation significantly at 28 days and reduced further at 6 months. In general, incorporation of fly ash as partial replacement of cement improved the durability properties of concrete.
Subfields: Civil and Structural Engineering, Mechanics of Materials
View Paper: https://www.semanticscholar.org/paper/c64d36e12193312b0bce611bac660ecfb1c8a1c0
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In Civil and Structural Engineering
In Mechanics of Materials
Citations in the corpus
- Cement Replacement Materials: Properties, Durability, Sustainability (2014, background): “In a recent study, durability properties of high strength concrete utilizing high volume Class F fly ash sourced from Western Australia have been investigated [180].”
- A comprehensive review on the applications of coal fly ash (2015, background): “Fly ash can improve the long-term durability properties of concrete by reducing the ingress of aggressive agents such a chloride ions (Nath and Sarker, 2011).”
- An overview on the influence of various factors on the properties of geopolymer concrete derived from industrial by-products (2015, background): “The aforementioned issues prompted various researches in an attempt to reduce the global carbon footprint ranging fromutilizing supplementary cementitious materials (SCMs) as partial cement replacement materials [6–10] to developing a whole new cementless binder, namely geopolymers [11–14].”