Performance Evaluation of Hospital Waste Ash-Modified Asphalt Mixtures

Abstract

Using waste materials in road construction is a sustainable technique that will promote waste reduction, a cleaner environment, cost savings in road construction projects, and serve as an alternative material. This study evaluated the performance of hospital waste ash (HWA) modified asphalt mixtures. The modified asphalt mixtures were produced using HWA as mineral filler at 0%–100% at an interval of 10% by weight. The performance of the mixtures was evaluated with the Marshall, Cantabro, and retained strength index (RSI) tests. The Marshall parameters indicate that the modified asphalt mixtures met the General Specification for Roads and Bridges of Nigeria with satisfactory results. Except for mixes prepared with 90% and 100%, HWA-modified mixtures fulfill the RSI and Cantabro durability requirement at up to 80% filler content. However, to ensure the optimum performance of the HWA-modified asphalt mixtures, a 40% HWA is recommended.

RSM based modelling and optimization of Marshall properties of steel-slag and lime-modified asphalt mixtures

“…The coefficients of the polynomial model were calculated to fit the experimental data. The final regression model equations regarding significant factors are expressed in Equations [1]- [6]. Similar regression equations were reported by Lapian et al [3] and Wang et al [1].…”

“…Incorporating various materials in the asphalt mix has been found suitable for transforming the mechanical and binding properties of asphalt. Modifying the asphalt mixes enhances the performance and increases the service life of asphalt pavement [5][6]. Steel slags are industrial waste from the production of steel.…”

Moisture susceptibility of waste ceramic tiles modified asphalt mixtures

“…To provide excellent service, the asphalt mixtures must remain durable over their intended life span. However, the durability of the asphalt mixtures is seriously affected due to moisture-induced damage [12]. According to Soenen et al [13], one of the main reasons flexible pavements fails is their vulnerability to moisture, which lowers their durability.…”