International Research Journal of Engineering and Technology (IRJET) Volume: 09 Issue: 07 | July 2022
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e-ISSN: 2395-0056 p-ISSN: 2395-0072
Properties of High Volume Fly Ash concrete M40 and M50 blended with Processed Fly Ash Batham Geeta1, Akhtar Saleem2, Rajesh Bhargava3 1PhD
Scholar, UIT-RGPV, Bhopal, India, UIT-RGPV, Bhopal, India, 3 Professor, RGPV, Bhopal, India. ---------------------------------------------------------------------***------------------------------------------------------------------------ABSTRACT-In this study concrete mixes of various proportions with w/c ratio 0.349 to 0.36 were prepared in the laboratory to 2 Professor,
determine compressive strength using Vikram cement trials 1 and 2 for M50 grade and trial 3 and 4 for M40 grade blended with 40% processed fly ash. On the basis of results obtained in the laboratory it can be concluded that M50 concrete blended with 40%PFA gives better results
Keywords - Processed fly ash, cement, concrete, ordinary Portland cement, compressive strength I INTRODUCTION Nikihil T. R. 2012, [1] conducted research to design HVFAC of grade M-60. Results indicated optimum % for cement replacement by HVFA is 55 %. The maximum compressive strength 66.19 Mpa reported at 55% replacement of Fly ash at 56 days curing with 1.6% super plasticizer and the minimum compressive strength 45.16 Mpa reported at 65% replacement at the age of 56 days. The maximum flexural strength 5.75 Mpa was observed at 55% replacement of Fly ash at 56 days curing with 1.6% super plasticizer. The minimum flexural strength 4.78 Mpa was observed at 65% replacement at the age of 56 days. [Soni and Saini, 2014]2 found reduction in compressive strength reduces 11.4 %, 30.1 %, 28.9 % at 30 %, 40 % and 50%. Setting time of concrete is greatly influenced by the amount and properties of fly ash used. For highway construction, changes in time of setting of fly ash concrete from non-fly-ash concrete using similar materials will not usually introduce a need for changes in construction techniques; the delays that occur may be considered advantageous [Sarath et. al., 2011]3. [Shrivastava and Bajaj, 2012]4 also found that flexural strength goes on decreasing with the increase in fly ash content at 7 days and 28 days. [Rafat Siddiue, 2013]5 conducted the experiments to determine the flexural strength of the fly ash concrete. Test results of fly ash concrete shown that the flexural strength of fly ash concretes continued to increase with the age. [Raju and John, 2013]6 reported Fibre addition to the fly ash based mix showed less strength at early age but almost same level of performance at later age was observed with respect to flexural strength. [S. Lokesh et. al., 2013]7 observed similar pattern in flexural strength of concrete produced as it was found2 in compressive strength. Fly ash Aggregates as replacement for natural aggregate and fly ash for replacement of cement both influences the strength performance significantly. It was found that flexural strength reduces when natural aggregates were replaced partially (40 %) with fly ash as compared to control mix. Further reduction in flexural strength continues when cement replaced with fly ash (40 %). Flexural strength increases when silica fume (10 %) is used as mineral admixture in concrete and loss of strengths can be compensated initially [Alaa M. Rashad et. al., 2014]8 found noticeable decrease in compressive strength when PC was partially replaced with 70 % FA (F70) during 7, 28, 90 and 180 days of hydration Author also found higher abrasion resistance of HVFA blended concrete found with SF and combination of SF+GGBS with class F fly ash. Lower abrasion resistance in HVFA concrete found GGBS.
II OBJECTIVE OF THE STUDY The research was aimed to investigate compressive strength using 40% processed fly ash for grade M40 and M50
III MATERIALS AND THEIR PROPERTIES Cement OPC cement Vikram was used for this research program.
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