Effect on Marshall Properties of Bituminous Mixes using Brick Dust and Concrete Dust as Filler
International Journal for Research in Applied Science and Engineering Technology
Asphalt concrete familiarly known as bituminous concrete is a petroleum product. It is used for driveways, roadways, walking paths, curbs and for any project that requires smooth surface. The aim of bituminous mix design is to determine the proportion of its ingredients in order to produce a mix which is strong, durable, workable and economical. In bituminous mixes ingredients used are aggregates, fillers and bitumen. Voids remain in coarse aggregates which are filled by fine aggregates. But
... aggregates. But all the voids are not filled by fine aggregates. Some of the voids still remain there which are filled by fillers. Fillers paly vital role in the filling of voids. On adding fillers physical and chemical properties of mix changes and gets improved considerably. Thus it is necessary to find the stability and behavior of bituminous mixes when filler is added in it. Asphalt institute in India, has recommended usage of 4-8% of filler in bituminous mixes. The present study deals with the effect on Marshall Properties of Bituminous mixes using brick dust and concrete dust as filler is studied. For both the bituminous mixes containing brick dust as filler and concrete dust as filler properties were studied and compared with each other. Marshall Method of mix design was used for the purpose or comparison. In this study also tests were carried out on aggregates and bitumen. The results obtained were compared with the specifications laid down by BIS, MORTH and IRC in order to find whether the materials were within the specified limits. Samples were prepared with varying bitumen content using brick dust and concrete dust as filler. Those samples were then tested through Marshall Method. The results revealed that physical characteristics of bitumen improved on adding the fillers. Also stability and flow value of bitumen mix improved. Adding filler also helps in reducing the problem of waste disposal.