High-Performance Cementitious Composites Made with Rice Husk Ash as Partial Replacement of Cement Containing Nano Additives

This research was to compare rice husk ash (RHA) concrete with which nano additives is better to maintain or enhance its workability and mechanical properties. RHA were used as partial replacement material of cement containing nano additives (Nano Silica and X-Seed XTE). In this study, the amount of RHA remained constant at the replacement dosage of 40% by binder weight throughout the experiment while NS additives was utilized at the replacement level of 5%, 7.5% and 10% whereas X-Seed STE was 0.2%, 0.4% and 0.6%. On the other hand, the w/c ratio and s/b ratio were 0.32 and 1.00 respectively. 7 different mix design were tested at the curing age of 2 days, 7 days and 28 days. Various tests were conducted to determine the mechanical and durability properties of these specimens such as flow table test, compressive strength test, flexural strength test, water absorption test, total porosity test and so on. Additionally, digital microscope analysis also conducted to determine the microstructural behavior of RHA concrete containing nano additives.