Comparison of Compressive Strength of M25, M30 Grades of Concrete by Partially Replacement of Fly Ash with Normal and Accelerated Curing
Author(s):
Gowri Sankara Rao .G, Lakshmi Ganesh.S, Anil Kumar .G
Keywords:
compressive strengths, curing of concrete, percentage increasing in compressive strength, accelerated curing.
Abstract
The advancement of concrete technology can reduce the consumption of natural resources and lessen the burden of pollutants on environment. Presently large amounts of fly ash are generated in thermal and steel industries with an important impact on environment and human health. In recent years, many researchers have established that the use of supplementary cementitious materials (SCMs) like fly ash (FA), blast furnace slag, silica fume, metakaolin (MK) and rice husk ash (RHA) etc. can, not only improve the various properties of concrete - both in its fresh and hardened states, but also can contribute to economy in construction costs. The use of fly ash in concrete formulations as a supplementary cementatious material was tested as an alternative to traditional concrete. This project work describes the feasibility of Fly Ash in concrete world. Fly Ash was collected from NTPC (National Thermal Power Corporation) which is located at paravada in Visakhapatnam. The cement has been replaced by fly ash in various dosages such as 10, 20, 30 and 40 percentages by weight of cement for M25 and M30 mixes. Concrete mixtures were produced, tested and compared in terms of compressive strength with the conventional concrete. These tests were carried out to evaluate the mechanical properties and compressive strengths at various curing periods such as 3, 7 and 28 days. Tests conducted for fresh concrete are workability tests like slump, vee-bee consistometer and compaction factor and for hardened concrete compressive strength is done. The 28 Days Cured concrete cubes of all proportions were cured in Accelerated Curing tank for 3hours in boiled water (at 1000C) to obtain 28 days curing strength at earlier stage. From the experimental investigations it has been observed that the compressive strength of the concrete is optimum at 20% fly ash replacement with cement.
Article Details
Unique Paper ID: 143768

Publication Volume & Issue: Volume 3, Issue 1

Page(s): 164 - 172
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