Durability and Mechanical Properties of Pavement Concrete Containing Bagasse Ash

Abstract

Abstract In this research, the durability and mechanical properties of pavement concrete containing bagasse ash was studied. The pavement concrete containing bagasse ash was made from Portland cement, sand, limestone aggregate, water, and bagasse ash. The bagasse ash was the waste from biomass power plant boiler of Sakaeo, Thailand. It was used to replace Portland cement at the level of 0 - 60 % to produce pavement concrete. Compressive strength, density, water absorption, porosity, modulus of elasticity, thermal conductivity and durability of pavement concrete were investigated. At the age of 28 days, the pavement concretes containing bagasse ash had compressive strength of 11.0 - 35.0 MPa, density of 2210 - 2400 kg/m3, water absorption of 15.00 - 20.82 %, porosity of 6.74 - 10.21 %, modulus of elasticity of 14.48 - 23.98 GPa, and thermal conductivity of 1.49 - 1.91 W/mK. In addition, the pavement concretes containing bagasse ash of 20 and 40 % with compressive strengths not less than 17.5 Mpa as required by ACI 211 for a normal weight concrete showed good durability in terms of abrasion resistance and acid resistance. Thus, this concrete could be used for pavement where the durability of concrete is a prime concern.