• G R V V Narendra Kumar
• G S V Karuna sri
• Dr D S V Prasad

Admixtures are using all over the world in concrete due to their low cost and echo-friendly nature. Hence Mineral admixtures such as fly ash, rice husk ash, silica fume etc. are more commonly used. This admixtures help in obtaining both higher performance and economical results. Metakaolin and Flyash are also such type of non - conventional material, which can be used in the construction industry to get more benefits. Metakaolin produced by calcinations and Fly ash is produced by coal combustion. The present work gives the results of compressive strength test to decide the suitability of Metakaolin and Fly ash in production of concrete. In the present work, the Compressive strength test carried out to study the effect of acid curing on M25 concrete in which Ordinary Portland cement is partially replaced by Metakaolin and Fly ash and acid curing is done by subjecting the concrete to different concentrations of Hydrochloric acid (HCl). The replacement of Metakaolin and Fly ash level were 0%,5%,10%,15%,20% separately and from this finding the optimum value. A separate mix of concrete was made by partial replacement of cement with optimum levels of Metakaolin and Fly ash. All mixes were tested for compressive strength at 7, 14 & 28 days of water curing. The final optimum levels mix was tested for compressive strength at the end of 7, 14 & 28 days under both water and HCL acid with concentrations of 3% & 5%.

Flyash,Metakaolin,Compressive strength,Compaction factor

"A Study On Effect Of Hydrocloric Acid Attack On Compressive Strength Of Concrete By Replacing Cement With Fly Ash And Metakaolin", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 8, page no.468-471, August-2018, Available :http://www.jetir.org/papers/JETIR1808067.pdf

"A Study On Effect Of Hydrocloric Acid Attack On Compressive Strength Of Concrete By Replacing Cement With Fly Ash And Metakaolin", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 8, page no. pp468-471, August-2018, Available at : http://www.jetir.org/papers/JETIR1808067.pdf