Effect of Non-Class Fly Ash on Strength Properties of Concrete

Developing of green construction and reducing CO۲emissions in the environment is a priority for industry in the coming years. Recycling fly ash in the concrete industry is a well-known way to reduce environmental impact. Aside from this benefit, there are numerous other positive effects of incorporating fly ash into concrete; however, in this research, the objective is to replace cement with a different percentage of non-class fly ash with high CaO, more than ۴۲%. The analyzed variables are non-class fly ash properties, the effect of fly ash presence on the main properties of concrete and examining the optimum of non-class fly ash in ordinary concrete C-۲۵/۳۰ and high-performance concrete C-۵۰/۶۰. All investigations took place in the laboratory by producing ۲۴ different mix designs and more than ۱۰۰۰ specimens to examine: consistency, setting time, shrinkage, and compressive strength in the short and long terms of curing. Recycling industrial waste in new construction, especially fly ash because of its non-uniform properties, still has some obstacles and is not a practical issue, but the future must be environmentally friendly, and this research proves that the objective of producing sustainable ordinary and high-performance concrete was achieved by replacing ۴۰% of cement with non-class high CaO content fly ash. Doi: ۱۰.۲۸۹۹۱/CEJ-۲۰۲۴-۰۱۰-۰۳-۰۲ Full Text: PDF

Keywords:

Non-Class Fly Ash , Compressive Strength , Shrinkage , CO۲ Emission.