Study of the Properties of Concrete by Partial Replacement of Ordinary Portland Cement by Rice Husk Ash

Abstract

Over the past years, there has been seen an increasing number of research on the use and utilization of industrial, agricultural and thermoelectric plants residue in the production of concrete. Different materials with pozzolanic properties such as fly ash, condensed silica fume, blast furnace slag and rice husk ash have played an important part in the production of high performance concrete. During the late 20th century, there has been an increase in the consumption of mineral admixture by the cement and concrete industries. The rate is expected to increase. The increasing demand for cement and concrete is met by the partial cement replacement. Substantial energy and cost savings can result when industrial by-products are used as a partial replacement for the energy intensive Portland cement. The presence of mineral admixture and mineral admixtures in concrete is known to impart significant improvement in workability and durability. Among the different existing residues and by products, the possibility of using rice husk ash in the production of structural concrete is very important for India. India is the second largest rice paddy cultivating country in the world. Both the technical advantages offered by structural concrete containing rice husk ash and the social benefits related to the decrease in number of problems of ash disposal in the environment have simulated the development of research into the potentialities of this material. The objective of the present investigation is to evaluate one type of commercially available RHA as supplementary cementitious material for cement and to evaluate the threshold limit of replacement of cement. The main aim of this work is to determine the optimum percentage (0, 5, 10, 15 & 20%) of RHA as a partial replacement of cement for M30 and M60 grade of concrete and also the effect of super plasticizer on mechanical properties. The physical properties of cement have to be determined and will be tabulated as given below.