Volume No. 9 Issue No.: 3A Page No.: 995-1002 January-March 2015

 

STRENGTH AND STIFFNESS DEVELOPMENT OF FIBRE-REINFORCED LATERATIC SOIL

 

Patel Suchit Kumar and Singh Baleshwar*

Department of Civil Engineering, Indian Institute of Technology, Guwahati (INDIA)

 

Received on : October 10, 2014

 

ABSTRACT

 

In this study, unconsolidated undrained triaxial compression tests have been carried out on a lateritic soil reinforced with glass fibres to investigate the gain in strength and stiffness over a range of fibre content, fibre length and confining pressure. Fibres of different weight proportions (0.25 to 1.0% by dry weight of soil) and of 10 to 30 mm lengths have been used under confining pressures varying from 100 to 400 kPa. The results show that the reinforcement effect is the maximum for 0.75% fibre content and 20 mm fibre length. The strength improvement is relatively greater at lower confining pressure for all fibre contents and lengths. The strength gain of the reinforced soil is due to marginal increase in friction angle and substantial increase in cohesion. The stiffness development of the reinforced soil follows the same trend as that of strength development

 

Keywords : Reinforcing elements, Isotropic fibers, Lateritic soil, Tropical regions

 

 

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