Abstract
This paper is to investigate experimentally the effect of the use of waste refined cooking oil(ERCO) on the engineering properties of the high volume admixture concrete. Fly ash and blast furnace slag were replaced by cement by as much as 30% and 60%, respectively. Fresh properties, strength development, accelerated carbonation and porosity by mercury intrusion penetration methods were tested under various dosages of ERCO. It showed that an increase of ERCO resulted in reduction of slump and air contents, and compressive strength also showed declining tendency. Test results also indicated that the incorporation of ERCO led to enhance the carbonation resistance of the high volume admixture concrete due to saponification reaction between fat acid in ERCO and $Ca(OH)_2$. Based on MIP observation, the use of ERCO can fill the capillary pore, which contributes to reduce the amount of total pore volume.
