Effective study of Geocell, Geogrid and Geo textile as Geo -Reinforcement on CBR and Resilient modulus value of subgrade

Authors

  • Gajula Venkatesh , Ashok Kumar Suluguru

Abstract

This paper presents the results of the California Bearing Ratio (CBR) values of Specimens of
conventional and Specimens with Geosynthetics at various Heights of CBR mould. Along with the CBR,
Cyclic load test is performed to evaluate the resilient modulus values of Optimum CBR specimens on
expansive soils. In highway construction, if soil is of Black cotton which is having conventional CBR value
of 0.9% is not suitable for pavement sub grade as per IRC: 37-2012. Black cotton soils are not effective in
increasing the CBR and resilient modulus value. In this research we emphasis on geocell, geogrid and
geotextile as Soil reinforcement. Coir geotextile and geogrid of uniaxial, biaxial, triaxial are installed at
1/3H, 1/2H and 2/3H from top of CBR mould. From this we suggest Triaxial Geogrid and Coir Geotextile
with 1/3H are most effective in increasing the CBR value. Vehicle tyre tube are cut into hollow cylinder
are used as geocell with different aspect ratio (0.75, 1 and 1.5) at different heights with chevron pattern are
investigated and suggested that Geocell with aspect ratio 1.5 and 1/3H is effective in increasing the CBR
value. CBR test is performed by data acquisition method which directly gives the load at deformation
2.5mm and 5mm. Furthur the optimum CBR specimens of geocell, geo grid and geotextile are subjected
to cyclic load test to find out the resilient modulus.

Published

2020-11-01

Issue

Section

Articles