TY - JOUR
T1 - Experimental study on the effect of chitosan biopolymer on sandy soil stabilization
AU - Shariatmadari, Nader
AU - Reza, Mohammad
AU - Tasuji, Amiri
AU - Ghadir, Pooria
AU - Javadi, A. Akbar
N1 - Funding Information: The project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 778120.
Publisher Copyright: © The Authors, published by EDP Sciences 2020.
PY - 2020/10/16
Y1 - 2020/10/16
N2 - Due to the environmental impacts of conventional soil stabilization materials, such as cement, ongoing efforts have been carried out by different researchers to find alternative economical materials for substitution. Biopolymers are environmentally friendly materials that are widely used in different geoenvironmental applications such as removal of heavy metals from contaminated soils, reduction of soil hydraulic conductivity, erosion control, and soil improvement. In this research the feasibility of using chitosan biopolymer for sandy soil stabilization has been studied. The effects of biopolymer content, curing time, and curing conditions have investigated using unconfined compression tests. The results indicated that incorporation of chitosan has the potential to increase the interparticle cohesion between the particles and considerable improvement of sandy soil mechanical properties. After initial strengthening of the soil, some strength reduction over time was observed due to the degradation characteristics of the chitosan. With regards to the curing condition, better performances at dry condition compare to the wet and saturated environment were achieved. In addition to soil mechanical properties, the pore plugging effect of chitosan biopolymer on highly permeable sandy soil has been studied in this study.
AB - Due to the environmental impacts of conventional soil stabilization materials, such as cement, ongoing efforts have been carried out by different researchers to find alternative economical materials for substitution. Biopolymers are environmentally friendly materials that are widely used in different geoenvironmental applications such as removal of heavy metals from contaminated soils, reduction of soil hydraulic conductivity, erosion control, and soil improvement. In this research the feasibility of using chitosan biopolymer for sandy soil stabilization has been studied. The effects of biopolymer content, curing time, and curing conditions have investigated using unconfined compression tests. The results indicated that incorporation of chitosan has the potential to increase the interparticle cohesion between the particles and considerable improvement of sandy soil mechanical properties. After initial strengthening of the soil, some strength reduction over time was observed due to the degradation characteristics of the chitosan. With regards to the curing condition, better performances at dry condition compare to the wet and saturated environment were achieved. In addition to soil mechanical properties, the pore plugging effect of chitosan biopolymer on highly permeable sandy soil has been studied in this study.
KW - chitosan biopolymer
KW - experimental study
KW - sandy soil stabilization
KW - soil stabilization materials
KW - contaminated soils
KW - curing time
KW - curing conditions
KW - sandy soil mechanical properties
KW - compression testing
KW - heavy metals
KW - soil cement
KW - soil testing
UR - http://www.scopus.com/inward/record.url?scp=85097141192&partnerID=8YFLogxK
U2 - 10.1051/e3sconf/202019506007
DO - 10.1051/e3sconf/202019506007
M3 - Conference article
AN - SCOPUS:85097141192
SN - 2555-0403
VL - 195
JO - E3S Web of Conferences
JF - E3S Web of Conferences
M1 - 06007
T2 - 4th European Conference on Unsaturated Soils, E-UNSAT 2020
Y2 - 19 October 2020 through 21 October 2020
ER -