An Experimental Investigation of High Volume Fly Ash Concrete

Fly ash a byproduct of the coal fired power plants is regarded as a good pozzolanic material making it an eligible material to be used as partial replacement in ordinary Portland cement concretes. In normal RCC construction the usage of fly ash is limited to 10-25% of weight of ordinary Portland cement. This type of cement is known as Portland pozzolona cement or blended cement. Usually, this amount has a beneect on the workability and cost economy of concrete but it may not be enough to sufficiently improve the durability to sulphate attack, alkali-silica expansion, and thermal cracking. But a concrete to be classified as High Volume Fly Ash Concrete and to take care of sulphate attack and to improve durability of structure, shall have fly ash content about 50% of the total binder content. The intent of this project is to develop different mixes with varying fly ash content and to study to their properties. The objective of the present investigation is HVFAC to the Indian context using Indian materials. The specific goal of the project is to determine the optimum fly ash content in concretes made with Ordinary Portland Cement (OPC) and Portland-Pozzolona Cement (PPC) designed to meet the requirements of concrete grades M20, M40.