An experimental study on effect of reinforcement on stress- strain behavior of flyash

Abstract

In India, approximately 73% of total install power production capability is from thermal in which coal-based production contributing 90%. Most of the thermal power stations and several captive power plants used bituminous and sub-bituminous coal and produced large quantities of fly ash as a residue and these are disposed of on-site impoundments behind engineered earth dam. The country’s faith on coal for power production has unchanged. Thus fly ash management is a cause of concern for the future. One of the finest applications of fly ash is using it as a construction material as embankments, fills and others. In the present study, an attempt had made to learn the properties of fly ash and properties of GI reinforcement and effect of the reinforcement on the stress-strain behavior of fly ash. A comprehensive set of laboratory uni- axial compression tests were carried out on fly ash with dry density and different optimum moisture content (OMC) which are obtained from standard proctor test. Uni- axial compression tests are done on fly ash with and without reinforcement. The above procedure repeated using dry density and optimum moisture content obtained from the modified proctor test. The stress strain behavior was analyzed by changing galvanized (GI) reinforcement numbers and location. The influence on number & location of GI iron reinforcement on stress strain behavior of sample were studied. It was observed that the inclusion of GI reinforcement increases the peak stress; axial strain at failure. It is observed that increase the numbers of GI reinforcement effect of reinforcement on fly ash also decrease and also observed that decrease the percentage of moisture content strength of fly ash increase. In general, inclusion of reinforcement in fly ash layer can greatly increase the strength, stiffness of fly ash layer thereby comparable strength can be obtained even with decrease of thickness of layer.