Strength development of cement-treated sand using different cement types cured at different temperatures

¹ Geotechnical Engineering and Artificial Intelligence research group (GEOAI), University of Transport Technology, 54 Trieu Khuc, Thanh Xuan, Hanoi, Vietnam
² Hiroshima University, Department of Civil and Environmental Engineering, Graduate School of Engineering, 1-4-1, Kagamiyama, Higashi-Hiroshima, Hiroshima 739-527, Japan
³ Denka Co., Ltd., Cement & Special Cement Additives Research Dept., Omi Plant, 2209 Oaza Omi, Itoigawa, Niigata 949-0393, Japan

^* Corresponding author: nakarai@hiroshima-u.ac.jp

Abstract

This study aimed to investigate the strength development of cement-treated sand using different cement types: ordinary Portland cement (OPC), high early strength Portland cement (HPC), and moderate heat Portland cement (MPC) cured at different temperatures. The cementtreated sand specimens were prepared with 8% of cement content and cured under sealed conditions at 20οC and 40οC, and mortar specimens were also prepared for reference. The results showed that the compressive strength of cement-treated sand increased in order of MPC, OPC, and HPC under high curing temperatures. It was interesting that the compressive strength of the specimens using HPC was much larger than that of the specimen using OPC and MPC under 20οC due to the larger amount of chemically bound water. Additionally, it was revealed that under high curing temperatures, the pozzolanic reaction was accelerated in the cement-treated sand; this may be caused by the high proportions of sand in the mixtures.