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Geomechanics and Engineering
  Volume 7, Number 6, December 2014 , pages 633-647

Geotechnical behavior of a beta-1,3/1,6-glucan biopolymer-treated residual soil
Ilhan Chang and Gye-Chun Cho

    Biopolymers, polymers produced by living organisms, are used in various fields (e.g., medical, food, cosmetic, medicine) due to their beneficial properties. Recently, biopolymers have been used for control of soil erosion, stabilization of aggregate, and to enhance drilling. However, the inter-particle behavior of such polymers on soil behavior are poorly understood. In this study, an artificial biopolymer (β-1,3/1,6-glucan) was used as an engineered soil additive for Korean residual soil (i.e., hwangtoh). The geotechnical behavior of the Korean residual soil, after treatment with β-1,3/1,6-glucan, were measured through a series of laboratory approaches and then analyzed. As the biopolymer content in soil increased, so did its compactibility, Atterberg limits, plasticity index, swelling index, and shear modulus. However, the treatment had no effect on the compressional stiffness of the residual soil, and the polymer induced bio-clogging of the soil
Key Words
    beta-1,3/1,6-glucan; biopolymer; Korean residual soil; geotechnical behavior; elastic wave
(1) Ilhan Chang:
SOC Research Institute, Korea Institute of Civil Engineering and Building Technology (KICT), 283 Goyangdae-ro, Ilsanseo-gu, Goyang 411-712, Republic of Korea;
(2) Gye-Chun Cho:
Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea.

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