EFFECT OF FLYASH AND RICE HUSK ASH ONPERFORMANCE OF MORTAR

• Main Authors: B.P. Nandurkar, Dr. A.M. Pande
• Format: Article
• Language: English
• Published: Yeshwantrao Chavan College of Engineering, India 2018-07-01
• Series: Journal of Research in Engineering and Applied Sciences
• Subjects: fly ash; rice husk ash; mortar; compressive strength; drying shrinkage
• Online Access: http://www.mgijournal.com/Data/Issues_AdminPdf/110/5-Volume%203%20Issue%201%20%20January%202018.pdf

In, India, construction industry specially housing sector predominantly uses cement sand mortars for masonry construction. Cements being used in these mortars are predominantly high early strength cements like 53 grades or PPC. The practice in the other developed countries significantly differs from that of India as high early strength cements are not recommended in these countries, as they may lead to development of minor cracks in mortars, resulting in compromise on performance of masonry. Similar text is mentioned in 0.2 section of IS: 3466. Thus, there is great need to develop masonry mortars incorporating fly ash and rice husk ash to make masonry structure more performing and achieving the compressive strength as prescribed in Indian standards.The performance of cement sand mortar made with composite cementing components like ordinary portland cement, agricultural waste rice husk ash and industrial waste fly ash were studied in this work. Cement was replaced upto 40% of its weight by fly ash and rice husk ash. The proportion of mortar was taken 1:3 (Cementing component: Sand). Compressive strength test was conducted at 3, 7 and 28 and 90 days of curing. The results indicate replacement of 20 to 25% of cement with fly ash significantly improves the strengths and performance of mortar. The strength of rice husk ash mortar mixes reduces as the percentage of rice hush ash in the mixes is increased. Water absorption test results were on higher side, when cement was replaced by rice husk ash. The outcome of this research is expected in paving way in development of new and high performing masonry mortar combinations.