CHARACTERIZATION OF LIMESTONE WASTE FOR CONSTRUCTION OF FLEXIBLE PAVEMENT

Kailash, Alingprabhu S.P, Devaraj S.H, Dhiraj kumar Mehta, S.S.Awanti

Abstract: This paper reports about the survey work carried out to determine the total limestone waste generated at the quarry sites located in seven villages of Chittapurtaluk in Gulbarga district and also experimental investigation carried out on this limestone waste to find out its feasibility for construction of flexible pavement layers. From the survey work carried out at seven villages of Chittapurtaluka it was observed that about 70 lakh tonnes of waste would be produced every year. Characterization of this limestone waste by conducting laboratory studies to find out its feasibility for road construction would help to reduce the demand-supply gap for aggregates, conserve depleting sources of good quality stone aggregate and decrease environmental degradation due to excessive quarrying activities. Laboratory investigation includes determination of physical properties of limestone waste aggregates, preparation of job mix formulae for Granular Sub Base (GSB) and Wet Mix Macadam (WMM) layers, Modified proctor compaction test to evaluate maximum dry density and optimum moisture content on WMM and GSB mixes, CBR test and Direct Shear test on GSB mixes. Laboratory results were compared with conventional Basalt aggregates. Results reveals that lime stone aggregates fulfill the requirements of MoRT&H-2001 and can completely replace the conventional aggregate like Basalt in GSB and WMM layers

Keywords: Lime stone Waste, Basalt, GSB, WMM and Job mix Formulae

DOI: https://doi.org/10.15623/ijret.2013.0213039