چکیده مقاله
As pore fluid’s chemical properties in cohesive soils may have decisive effects on geotechnical characteristics of barriers, an investigation carried out to study bentonite contaminant interactions at various phosphorus ion concentrations Bentonite specimens were artificially contaminated by mixing the soil with di ammonium phosphate DAP in concentrations ranging from 0 01 to 0 1mole/l The conventional geotechnical experiments such as compaction, unconfined compressive strength, and direct shear box were performed Findings on phosphorus ion impact on the water content ω change, dry density, unconfined compressive strength, internal friction angle, and cohesion indicate that: Increasing phosphate ion concentration in soil electrolyte may lead to an increase in cohesion, and unconfined compressive strength of contaminated bentonite The obtained results showed that 57% and 29% improvement in cohesion and unconfined compressive strength, respectively may be achieved by maintaining a high DAP concentration of about 0 1 mol/l Our observations showed that a given value of 23% optimum water content with deionized water increased to 25% at the highest phosphorus ion concentration
کلیدواژهها
نویسندگان
B. Khoraminezhad
Postgraduate student
M. R. Alavi Moghaddam
Assistant professor
H. O. Bayat
Associate professor, Department of Civil and Environmental engineering, Amirkabir University of Technology, Tehran ۱۵۸۷۵ ۴۴۱۳, Iran
شیوه ارجاع
Khoraminezhad, B. and Alavi Moghaddam, M. R. and Bayat, H. O.,1388,Investigating Effects of Phosphorus Ions on Geotechnical Properties of Bentonite,8th International Congress on Civil Engineering,Shiraz
ارائهشده در
مجموعه مقالات هشتمین کنگره بین المللی مهندسی عمران21 اردیبهشت 1388 · شیراز