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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2014, Vol. 15 Issue (5): 364-373    DOI: 10.1631/jzus.A1300358
Civil Engineering     
A new triaxial apparatus for testing soil water retention curves of unsaturated soils under different temperatures
Guo-qing Cai, Cheng-gang Zhao, Jian Li, Yan Liu
Department of Geotechnical and Geoenvironmental Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
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Abstract  This paper presents a new triaxial apparatus for testing soil water retention curves (SWRCs) under different temperatures. The components of this modified apparatus, as well as the special features of each component, were described. The key part of this innovative apparatus was the temperature control system, which was cooperated with a loading system and a suction control system. Different methods of heating were compared and a more effective method, which used a heating element around the pressure chamber, was consequently adopted. Under different temperatures (25, 40, and 60 °C) and different net mean stresses (40, 100, and 200 kPa), typical results from the SWRCs tests for unsaturated silty clay were presented and analyzed. The experimental results show that the volumetric water content reduces with the increasing temperature at constant suction.

Key words： Unsaturated soils      Temperature controlled      Triaxial apparatus      Volume change      Soil-water characteristic curve     
Received: 04 November 2013      Published: 04 May 2014
CLC:  TU411.4  
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Guo-qing Cai, Cheng-gang Zhao, Jian Li, Yan Liu. A new triaxial apparatus for testing soil water retention curves of unsaturated soils under different temperatures. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2014, 15(5): 364-373.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A1300358     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2014/V15/I5/364

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