Effects of Reclaimed Asphalt Pavement and Saw Dust Ash on Characteristics of Bituminous Concrete

Abstract

To prevent the scarcity of conventional materials for bituminous mixes, pavement engineers newlineare exploring alternative paving materials to use in the bituminous mix after modifying the newlineproperties for the construction of the flexible pavement by considering the adverse newlineenvironmental issues and rapid growth of traffic. Furthermore, the ongoing commitment of newlinehumanity to safeguard the environment underscores the paramount importance of recycling newlinewaste within the construction industry, in pursuit of sustainable development. So, the use of newlinewaste in place of traditional pavement material is also a possible solution against the rising newlineproblems regarding the safe clearance of waste materials. The highway industry stands poised newlineto make a significant impact in waste material recycling, provided that the resulting newlineimprovements in pavement performance are substantial. A number of previous studies newlinehighlighted the modification of the bituminous mixture by using various industrial wastes [i.e., newlinebrick dust, marble dust, fly ash, pond ash, etc.] and agricultural wastes [i.e., Rice husk ash newline(RHA), Corn cab ash (CCA), Saw dust ash (SDA)] as filler materials. However, such works newlineare confined only to the determination of the various properties but performance evaluation in newlineterms of the long-term durability of such mixes has rarely been discussed. Eventually, the newlinehomogeny distribution of reference filler within the asphalt film of the mix was not taken into newlineconsideration. newlineReclaimed asphalt pavement (RAP) is one of the most usable recycled materials in the newlinepavement industry. A previous study reported that RAP material could use 100% to construct newlinethe base and sub-base course of pavement. But said material used on the surface of the newlinepavement is limited (and only 15% was used without evaluating the performance). newlineAdditionally, no studies were found with a desirable amount of RAP material used by adding newlineSDA as filler to prepare the bituminous mix. So, the inconspicuous clarity on the durability of