Dr. Sangchul Hwang received a PhD in Environmental Protection Agency, National Risk Management Research Laboratory (Ada, OK). Dr. Hwang is a full professor in the Department of Civil Engineering at the University of Puerto Rico at Mayagüez. He conducts environmental research on water sustainability and waste management. He teaches Water/Wastewater Treatment and Solid Waste Management. Dr. Hwang is a member of AWWA, ACS and WEF.
Presentation Title
Delayed Role of Fly ash and Alkali Activation in the Development of Compressive Strength of Geopolymer Paste cured at Ambient Temperature
Abstract
The current study investigated the production of high volume fly ash geopolymer paste in a2 admixture was found to reduce the spread percentage of the fresh paste and had the least effect on the compressive strength of the hardened paste. More importantly, 28-day optimum mix did not require any nanoSiO2 additions, which signified possibility of economical production of high-volume fly ash geopolymer.