Investigating the Mechanical and Durability Performance of Concrete with Partial Replacement of Coarse Aggregate and Cement Using Waste Tire and Sugarcane Husk Ash
摘要
As the need for construction-needed material is growing and sustainable practice is becoming more important, the reutilization of industrial and agricultural waste in concrete material has become the topic of great interest. In this paper, the mechanical and durability properties of C25 grade concrete is assessed in which coarse aggregates and cement are partially substituted with manually chopped waste tires aggregates (WTA) and naturally burned sugarcane husk ash (SHA). Four concrete mixes were tested (0%, 4%, 8%, and 12% replacements), where the mixes were based on the ACI 211 mix design method with constant 0.49 w/c. A total of 156 specimens were tested against compressive strength (36) specimens of size, flexural strength (36) specimen, water absorption (36), acid attack (12) and tensile strength by (36) specimens at 7, 14, and 28 days. The resistance to the exposure to the 5% HCl acid bath for 28 days and water absorption capacity was also tested. The results showed that a replacement of up to 8% provide optimum performance, resistance to acid, and have enough density and workability. Beyond 8%, the strength performance deteriorated. At 8% replacement an estimated material cost 6.1% found reduced. The research has a potential new and economically productive method of using two sources of industrial-agro waste in the concrete structure, which is specific to the developing countries such as Ethiopia.