EFFECT OF PARTIAL REPLACEMENT OF SAND BY POND ASH ON STRENGTH CHARACTERISTICS OF DISCRETE FIBER REINFORCED CONCRETE

Abstract

Pond ash is wastes and by-products of Thermal power plant, have been introduced into Indian concrete industry to conserve natural resources of ingredients of concrete. In India, most of the Thermal power plants adopt wet method of ash disposal. Pond ash is collected from Thermal power plant at the bottom, in that it contains significant amount of relatively coarser particles (spanning from 150 microns to 2.36 mm). Pond ash utilization helps to reduce the consumption of natural resources. Also it is help to solve the problem of disposal of Pond ash because it contains huge amount of chemical compounds such as SiO2, Al2O3 etc. These chemical compounds (SiO2, Al2O3) are plays an important role in hydration reaction and helps to produce bond between two adjacent particles. Use of Pond Ash in concrete is an important eco efficiency drive. It is necessary to find the exact suitable percentages of pond ash so that it is decided to use in varying percentage as 0%, 10%, 20% and 30% and to check the properties of fresh concrete and hardened concrete such as slump and compressive strength, tensile strength, flexural strength respectively. Also concrete plays an important role in long life period of structure so it is also important to check effect on durability by using sulphate attack, chloride ion penetration, drying shrinkage. Study shows the basic properties of Pond ash. It also compares these properties with natural sand. Partial replacement does not cause any adverse effect on properties of fresh concrete. The result shows that concrete giving good strength with partial replacement of fine aggregate. As well as Pond ash is the good if used as filler material in concrete. Thus, it is suitable to use pond ash as fine aggregate or partial replacement with natural sand.