Investigations on self-compacting concrete utilizing agricultural waste ashes

Abstract

Self-Compacting Concrete (SCC) plays a vital role in the construction sector globally due to the requirements of tall and complex congested structures. River sand is one of the natural key ingredients that has high demand due to the expansion of cities and the growth of population. To overcome this problem researchers from various countries are attempting for alternative materials. In this research, Sugarcane Bagasse Ash Aggregates (SBAA) and Rice Husk Ash Aggregates (RHAA) were utilized to partially substitute of fine aggregate in SCC. The suitability of SBAA and RHAA in SCC is assessed by microstructural characterization and mechanical properties. Three groups of SCC mixes were prepared. Gropup-1 mix contains RHAA about (0%, 5%, 10%, 15% and 20%), Group-2 mix contains SBAA (0%, 5%, 10%, 15% and 20%) and Group-3 mix contains blended RHAA SBAA (each 5%, 10%, 15% and 20%). EFNARC guidelines were used for mix design and assess the rheological characteristics. In all the groups of SCC mixes, 10% replacement of SBAA and RHAA shows significant results. This investigations shows that the blended ash aggregates can be replaced with fine aggregate and considerably can reduce the demand of river sand.