Durability Study on Rice Husk Ash for Optimum Level of Replacement of Cement in Concrete

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2015 by IJETT Journal
Volume-28 Number-3
Year of Publication : 2015
Authors : P V Rambabu, J Gopala Varma, G V Ramarao
DOI :  10.14445/22315381/IJETT-V28P228


P V Rambabu, J Gopala Varma, G V Ramarao"Durability Study on Rice Husk Ash for Optimum Level of Replacement of Cement in Concrete", International Journal of Engineering Trends and Technology (IJETT), V28(3),144-149 October 2015. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

The pervious study on rice husk ash suggests that optimum level of replacement of rice husk ash in concrete is 10% of total weight of cement. This paper aims for maximum optimum value within 10% of replacement for better compressive strength and durability. RHA exhibits high pozzolanic characteristics and shows good pozzolanic behavior due to its high silica content. Rice husk ash (RHA) essentially consists of amorphous silica (90% SiO2), 5% carbon, and 2% K2O. Rice husk ash has been partially replaced at different percentages (0%, 5%, 6%, 7%, 8%, 9% and 10%) by weight of cement for mix and cured for different curing periods (28 days, 60 days, 90 days). This study suggests that at 6% replacement of OPC with RHA Exhibits good compressive strength, because of its high pozzolanic activity. Effect of Hydrochloric acid (HCL) on properties of replaced RHA concrete and compressive strength of cement concrete is taken as study area. The study reviles that the rate of development of compressive strength decreased with increase in concentration of HCL at 28days, 60days and 90days.but at 6% replaced RHA shows good resistance to Hydrochloric acid attack.


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Rice husk ash (RHA), compressive strength, durability, hydrochloric acid.