Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering No. 214, pp.127-132 (2001)

The Influence of Fly Ash and Cinder Ash as Mineral Additive on Mechanical Properties of Massive Concrete

Hassan Khaled*,Hattori Kunio**,OGATA Hidehiko**,SATO Shushi*

*The United Graduate School of Agriculture Science,Tottori University, 4-101 Minami Koyama-cho,Tottori 680-8553,Japan
**Faculty of Agriculture, Tottori University, 4-101 Minami Koyama-cho,Tottori 680-8553,Japan

Abstract

　In this research, the mechanical properties of massive concrete specimen replaced the ordinary Portland cement with fly ash and fine aggregate with cinder ash respectively were evaluated. The replacement percentage of fly ash were 10%, 20%, 30% while that of cinder ash were constant, 10%. From the result of slump test, the addition of cinder ash made the workability of fresh concrete lower because the cinder ash absorbed much water. Higher percentage of fly ash replacement decreased the internal temperature rise of massive concrete specimen during the early age as confirmed with the measured temperature. Results of pulse velocity method showed that the massive concrete specimen replaced with higher percentage of fly ash were enhanced its strength development than the specimen with lower percentage of fly ash. Moreover, higher dosage of fly ash promoted the constant strength development of whole massive concrete specimen. Test results of extracted cores, the 30% dosage of fly ash improved significantly the mechanical properties of massive concrete specimen.