California Bearing Ratio for Cohesive Soils from Quasi Static Cone Tests

The California bearing ratio (CBR) test is the most widely spread method of determining strength pavement material and fundamental to design practice in countries. This expensive, laborious time consuming, overcome this, Quasi static cone penetrometer machine was fabricated used measure consistency limits (liquid limit-LL, Plastic limit-PL Plasticity index-PI), which were develop an empirical equation determine CBR. Soil samples collected unsoaked CBR, PL, LL PI determined according BS 1377 part 9 1377-2; 1990. penetration forces at 20 mm depth also limits. It found that force 1020 gf 60 achieved a respectively. correlation regression analysis between limits, experimental CBR obtained showed coefficient determination, R2 = 0.907 all parameters using multiple linear (MLRA). developed together with relationship Penetration tested come up General Empirical Equation. Verification formula can be accurately un soaked