ABSTRACT
The disposal of industrial wastes is a very big challenge for developed and developing countries. The solution to this industrial waste is maximum utilisation in the field of construction. Cement has been treated with copper slag (CS) and rice husk ash (RHA) to develop composite materials. In this experimental investigation, triaxial (unconsolidated undrained) tests have been performed to determine deviator stress at failure (kPa), and elastic modulus (MPa), and plot the modified failure envelopes. Triaxial tests were conducted under three confining pressures: 50 kPa, 100 kPa, and 150 kPa, with specimens evaluated after curing durations of 7, 14, and 28 days. The results revealed that deviator stress at failure (kPa), elastic modulus (MPa), and shear strength parameters (cohesion c and internal friction angle ϕ) increased as both curing time and confining pressure increased. It is concluded that cement is a good binder for CS and RHA. Developed composite materials may be used as construction materials for flexible pavement (sub-base) layers.
