Mechanical properties of Concrete by partial replacement of cement with RHA and flyash

Abstract

Concrete is the most widely used and versatile building material which is generally used to resist compressive forces. By addition of some pozzolanic materials, the various properties of concrete viz, workability, durability, strength, resistance to cracks and permeability can be improved. Many modern concrete mixes are modified with addition of admixtures, which improve the microstructure as well as decrease the calcium hydroxide concentration by consuming it through a pozzalonic reaction. In this work the concrete is replaced by the various percentages of rice husk ash. To study we have taken Rice husk ash, Fly ash as partial replacement of fine aggregate and cement, since the usage is common in the construction field. Using these constitutes M30 grade of concrete is designed with different mix proportions. These concretes shall be tested for finding compressive strength, split tensile strength for 7days, 14days and 28days using Indian Standard code books. These results were compared to M30 plane concrete and theoretical values.