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Correlation between Fineness and Compressive Strength of Flyash Collected from Different Sources for Partial Replacement of Cement in Mortar

Author(s):

Pankaj Joshi , Central Soil and Material research station, Olof Palme Marg, HauzKhas, New Delhi � 110016, India; Raj Kumar, Central Soil and Material research station; Rajeev Kumar, Central Soil and Material research station

Keywords:

Flyash, Fineness, CSH Gel, Compressive Strength, Pozzolana

Abstract

Today construction engineers all over the world are looking for an alternative to replace cement as a binding material in concrete by a material which would have good binding properties, easily available, reduce the overall cost of production, and at the same time would be environmental friendly. In modern construction industry, fly ash is an excellent alternative to meet all such required properties and has been widely accepted. In view of global warming, every effort is being made to reduce the emission of CO2 to the environment. Cement manufacturing industries are major contributor in the emission of CO2 as for every one ton of cement manufactured; one ton of carbon dioxide is released. By replacing cement with a material of pozzolanic characteristic, such as the fly ash, the cement and concrete industry together can meet the growing demand in the construction industry as well as help in reducing the environmental pollution. A concrete mix with fly ash can also provide economic benefits. Fly Ash concrete enhances the workability, compressive strength, flexural strength and also increases its pump ability, durability and concrete finishing. The fly ash used in concrete industry by partly replacement it with cement and also in embankment for filling the material. Leaving the waste materials to the environment directly can cause environmental problem. Hence the reuse of waste material has been emphasized. These industrial wastes are dumped in the nearby land and the natural fertility of the soil is spoiled. Flyash can be used as a partial replacement of cement in concrete without compromising in strength. Replacing cement with fly ash can reduce the heat of hydration of concrete. This reduction in the heat of hydration does not sacrifice long-term strength gain or durability. The reduced heat of hydration lessens heat rise problems in mass concrete placements. Comparison and correlation between fineness of flyash and compressive strength of flyash cement mortar is presented in this paper.

Other Details

Paper ID: IJSRDV7I40726
Published in: Volume : 7, Issue : 4
Publication Date: 01/07/2019
Page(s): 689-692

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