Evaluating the use of eggshell waste ash in high strength concrete

Abstract EN

This study aims to determine the effect of incorporating eggshell waste as partialcompensation from Portland cement material on high-strength concrete mixtures'performance.

The properties studied are workability, compressive and flexuralstrengths, water orption, dry density, and thermal conductivity.

In the sametrend, the environmental impact of the replacement mentioned above isevaluated.

Four different weight percentages (0% , 5% , 10% , 15% , and 20% ) of thecement were replaced with eggshells ash.

The results indicate that theincorporation of eggshell powder improves the compressive strength and flexuralstrength by about 14.7% and 6.5% , respectively, at 28days age over controlconcrete mixes at 15% replacement.

The optimum replacement ratio was foundto be 15% based on the strength.

Furthermore, the results showed a reduction inwater orption and thermal conductivity as 15% of eggshell ash was used as areplacement by cement weight with 10.7% and 10.65 respectively, besides thereduction in the amount of cement used in the mixture.

These results arepositively reflected in supporting natural resources' sustainability and depletingthe ozone layer by reducing the emitted gases.