Properties of self-compacting-concrete containing fly ash subjected to elevated temperatures

This paper aimed to study the properties of Self-Compacting-Concrete (SCC) such as compressive strength, splitting tensile strength, rapid chloride permeability, porosity, and mass loss when exposed to elevated temperatures. In this research, mixes were prepared with three percentages of class F fly ash ranging from 30% to 50% and for comparison; one controlled mixture without fly ash was also produced. The variables included were the temperature effects (20 °C, 100 °C, 200 °C, and 300 °C) using Ordinary Portland Cement. SCC mixes developed 28 days compressive strength ranging from 21.43 to 40.68 MPa and splitting tensile strength ranging from 1.35 to 3.60 MPa. Test results clearly show that there is little improvement in compressive strength within temperature range of 200–300 °C as compared to 20–200 °C but there is little reduction in splitting tensile strength ranging from 20 to 300 °C and with the increase in percentage of fly ash.

► Development of self-compacting concrete using high volume fly ash. ► Investigation of strength, permeability properties at elevated temperatures. ► Fly ash affects positively at elevated temperatures. ► Incorporation of fly ash improved the rapid chloride permeability at later age.