This paper discusses the laboratory design of continuously graded asphaltic concrete mixtures containing styrene butadiene styrene (SBS). The purpose of this study is to evaluate mechanical properties of control and SBS modified asphalt mixtures. Furthermore rheological properties of conventional and modified asphalt in different SBS content were studied. AC-10 was used as binder in the study. ...

A laboratory study was conducted with the aim of evaluating and optimizing the environmental parameters of "landfarming", i.e., the disposal by biodegradation in soil of oily sludges generated in the refining of crude oil and related operations. Oil sludge biodegradation was monitored by CO2 evolution and by periodic analysis of residual hydrocarbons. The parameters studied were soil moisture, ...

This report evaluates the effectiveness of rubber-asphalt and ebonite-asphalt mixes based on a review of published literature and unpublished reports. It discusses in detail various aspects of these mixes, including: diffe ent applications, physical properties, experiences of state highway agencies, and claimed advantages and problems associated with their use. The addition of ground tire rubbe...

Over the recent years, bitumen modification with polymers, acids, or mineral fillers has gained relevance to adjust its performance properties. This work reports the use of polyphosphoric acid (PPA) for the modification of formulated bitumen. With this objective, an in-depth literature review on PPA modification was firstly performed. Subsequently, five individual refinery components were selec...

This study presents a novel methodology to generate computational replicates of nanostructures multiphase materials, such as asphalt binders, by integrating image analysis techniques with stochastic random field (RF) modeling. Image are used identify and segment nanostructure images obtained atomic force microscopy, while RF is model the spatial distribution their material properties. The resul...

The workability of asphalt mixtures influences the logistical processes and workmanship during pavement construction. There are various methods for analyzing asphaltic concrete mixtures. However, there is a lack user-friendly laboratory that enable technologists, engineers, technicians, researchers to characterize trend via Newtonian physics. In this paper, new methodology, based on momentum th...

Moisture damage is one of the most significant troubles that destroy asphaltic pavement and reduces road serviceability. Recently, academics have noticed a trend to utilize fibers enhance efficiency asphalt pavement. This research explores effect low-cost ceramic fiber, which has high tensile strength very thermal insulation coefficient, on mixture's characteristics by adding three different pr...