To Study the Freeze-Thaw Resistance of Crumb Rubber Modified Bituminous Mix Using Ground Granulated Blast Furnace Slag (GGBFS) as Filler

Abstract

 First Asphalt concrete consists of  Aggregates, filler and Bitumen. Generally in practice,  cement, limestone and stone dust filler materials are used  in Asphalt pavement construction work. The recycled  rubber produced from automotive and truck tires called  crumb rubber is also being used in bituminous pavement  construction. Ground granulated blast furnace slag  (GGBFS) is a by-product of iron/steel industry which can  also be used as a filler material in Asphalt concrete. In the  present study an attempt is made to asses and evaluate the  effects of repeated freezing and thawing on Crumb Rubber  Modified Bitumen (CRMB) using (GGBFS) as a filler  material and compare the test results with the samples  using OPC as filler by carrying out experimental  investigation such as Marshall mix design test to evaluate  stability, flow and void characteristics of samples. The  Asphalt concrete samples were made using Bituminous  concrete (Grade II) with bitumen content fixed at 5.4%  From Marshall mix design and crumb rubber content fixed  at 15% by weight of the binder based on literature survey.  The amount of (GGBFS) used as filler material is fixed at  4% on the basis of literature survey. Moreover the focus  has been on exploring options to enhance the condition of  pavements and save subsequent maintenance and frequent  overlaying expenses in cold regions where the asphalt  pavements undergo deterioration due to seasonal freezing thawing.