Article Per Year (5 Year)
p-Index From 2021 - 2026
0
P-Index
This Author published in this journals
All Journal Lowland Technology International
H. M. Abuel-Naga
Unknown Affiliation
Civil Engineering, Building, Construction & Architecture Engineering Transportation

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
THERMAL CONSOLIDATION OF SOFT BANGKOK CLAY H. M. Abuel-Naga; D. T. Bergado; S. Soralump; P. Rujivipat
Lowland Technology International Vol 7 No 1, June (2005)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Understanding the thermo-mechanical behavior of saturated fine grained soils has become a very important topic whenever the geotechnical problems involve thermal effects. Previous research works in literature show that by subjecting the saturated fine-grained soils to temperature less than water boiling point volumetric and shear strength changes are induced. The thermally induced changes have been attributed to the physico-chemical change at the microscopic level. The aim of this research is to study the thermo-mechanical behavior of natural soft Bangkok clay, with temperature up to 90OC. Intensive laboratory tests using modified oedometer apparatus were conducted to investigate this behavior. The testing program was directed to study the effect of heat on the thermally induced volume change at different temperature and stress conditions, the thermal evolution of the preconsolidation pressure, the induced overconsolidation behavior after heating/cooling cycle, and the effect of temperature on the hydraulic conductivity. The experiments carried out on soft Bangkok clay provided some additional useful data on the thermo-mechanical behavior of the soft deposits. The results of this research work have been compared with those in literature with different clay types to generalize the thermo-mechanical behavior of the saturated clays.
NOVEL THERMO-PVD CONSOLIDATION TECHNIQUE FOR SOFT SOILS C. Pothiraksanon; D. T. Bergado; H. M. Abuel-Naga; S. Hayashi; Y. J. Du
Lowland Technology International Vol 9 No 2, Dec (2007)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Previous research efforts on investigating the thermo-hydro-mechanical behaviour of fine grained soils as well as recent extensive experiments conducted on soft Bangkok clay have demonstrated that saturated fine-grained soils subjected to temperature less than boiling point of water (100OC) undergo volumetric and shear strength changes depending on the stress history. These features encouraged employing the thermal load only, up to 90OC, or in combination with mechanical loading as ground improvement technique. This paper addressed the applicability of this technique through a series of large oedometer tests conducted on soft Bangkok clay. Heating was achieved using flexible wire heater attached to the PVD point or using separate line heat source. The clay has been subjected to either thermal load or thermo-mechanical load. The test results show that a combination of the thermal and mechanical load gives promising results and is a viable technique since it accelerates the rate of consolidation and increases the amount of total settlement. This behavior can be attributed to the increase in the soil hydraulic conductivity as the soil temperature increases. Therefore, raising the soil temperature during the preloading period can enhance the performance of the PVD, particularly, by reducing the drainage retardation effects due to the smear zone around PVD.
Co-Authors C. Pothiraksanon D. T. Bergado P. Rujivipat S. Hayashi S. Soralump Y. J. Du