Tên bài báo:
Effect Of Cement Types On Strength Development Of Cement-Treated Soils- Tác giả:
- Hồ Sĩ Lành
- Tham gia cùng:
- Tạp chí:
- Seventh International Conference on Geotechnique, Construction Materials and Environment
- Năm xuất bản:
- 2017
- Trang:
- Từ trang 212 đến trang 217
- Lĩnh vực:
- Kỹ thuật xây dựng công trình giao thông
- Phạm vi:
- Quốc tế
Tóm tắt:
High early strength Portland cement (HPC) generates more hydrated cement products than ordinary Portland cement (OPC) in early age. It suggests that we can utilize the pozzolanic reaction between clay particles and hydrated cement products by using HPC in order to achieve high compressive strength of cement-treated soils in early age. Therefore, the objective of this study is to investigate strength development of cement-treated soils using two types of cement (OPC) and HPC). Two soil specimen types (i.e. sand and sand loam mixtures) were cured under sealed condition at 20 C and 40 C and then unconfined uniaxial compressive test and thermal analysis were conducted. The results showed that the compressive strength of specimen using HPC under 20 C was 50% and 24% higher than that of specimen using OPC for the sand and sand loam mixtures, respectively. However, the results by thermal analysis did not provide clear evidence for explaining this unique behavior of HPC. In addition, for the specimen using OPC, the compressi ve strength under 40 C was 6% and 10% higher than that under 20 C for the sand and sand loam mixture, respectively; but, for the specimen using HPC, the compressive strength under 40 C was 15% and 48% lower than that under 20 C for the sand and sand loam, respectively. The further investigations on microstructure and mineralogy are needed to clarify the strength development mechanism of cement-treated soils using several types of cement under various curing temperature.
