Title : EFFECT OF FLYASH, STEEL FIBERS AND POLY PROPYLENE FIBERS IN CONCRETE PAVEMENT UNDER PMGSY: A CASE STUDY
Authors : P L Kadu1, P N Pagrut2, K C Tayade3 1Superintending Engineer, (PMGSY) MRRDA, Nagpur 2Executive engineer, (PMGSY) MRRDA, Nagpur 3Executive engineer & Principal Training Centre, Nagpur
Publication : 23 - 26 October 2013
Volume :
Pages :
Price : 250
Abstract : Pradhan Mantri Gram Sadak Yojna (PMGSY) is a centrally funded scheme under ministry of rural development, Government of India for connecting rural habitation by all weather roads.Under this scheme, concrete roads are also constructed in the habitat portion of the villages and the roads are constructed in M 30 grade concrete according to IRC:SP:62-2004. The high cost of concrete roads prohibits its use on large scale and hence to reduce cost and make the road more durable, sustainable and considering the minimum requirements of maintenance over design life time. The use of various innovative techniques and materials in M 30 grade concrete is studied by using flyash in concrete in proportion of 40% and 50% with and without steel fibers and Poly propylene fibers. For the study, a test patch of 50m length in each technique and material on pilot basis is constructed on existing WBM Road in use in Kamptee Taluka of Nagpur District in Maharashtra.The parameters for study included thickness of concrete pavement, cost and strength. The study indicated that there is saving of 12-18%, when flyash in different proportion with and without Steel and Poly propylene fibers is used and the thickness requirement in case where steel fibers are used and is reduced by about 25%. The 28 days compressive strength obtained are more than 36 N/mm2 i.e. more than required strength in all cases. However, extensive studies and trial patches are required to optimize the technique and make them more cost effective and suitable for use.