Experimental Investigation on the Performance of Bituminous Mixture Containing Brick and Iron Dust as Fillers

Abstract

Abstract Bulk waste dusts obtained from brick and steel manufactures can be utilized as construction materials in pavement that can save natural resources and reduce environmental pollution. This study aims to explore the potential of waste brick and iron dust as substitutes for stone dust filler in bituminous mixtures. Brick fines was treated with NaOH solutions (2M, 4M, 6M, and 8M) to reduce its high-water absorption, among these 4M NaOH solution was chosen as the most effective one. XRD and SEM tests were used to analyze filler properties. The strength performance of bituminous mixture using stone dust, brick dust, treated brick dust, iron dust were evaluated in terms of Marshall stability, indirect tensile strength, moisture susceptibility, cantabro and creep tests. The performance of the mixture for combination of brick - iron dust (1:1) filler is also determined. It is observed that Marshall stability and flow value of the mixes with untreated brick dust increased by 2.89% and 3.44% respectively as compare to conventional mix but with higher OBC. Marshall stability of the mix with iron dust has increased by 1.57% and but decrease in flow value by 13.21%. The ITS value with treated brick dust is higher than untreated brick dust filler. Whereas the iron dust filler and combined of brick and iron dust (1:1) filler has 6.33% and 4.7% higher ITS value as compared to conventional mix. The cantabro loss & static creep deformation values of mixes using brick and iron dust ranges from 5% to 8% & 1.0 to 1.7mm respectively. As the bituminous mixes with these waste products has shown improvement in strength properties, it can be used as alternative filler in bituminous mixes benefiting the impact of pavement industry in waste management concern.