MECHANICAL CHARACTERISTICS OF RECYCLED ASPHALT BY SUPERPAVE TECHNIQUE, NAJRAN AREA, KSA.

Evaluation of the Mechanical Properties of the cement treated Cold-in-Place Recycled Asphalt Mixtures

Cold-in-place recycling (CIR) is an environmentally sustainable alternative for preservation of asphalt pavements. A major disadvantage of this practice is the lower strength of the cold-in-place mixtures. Addition of cement into this type of mixture is a method for increasing its bearing capacity. The effect of cement content on the mechanical properties of the cold-in-place recycled asphalt m...

Leaching Characteristics of Recycled Asphalt Pavement: RAP May Be Suitable As a Fill Material

A procedure for stabilization/solidification of loose waste from the manufacture of Ni and Cd electrodes, which represents a nonutilizable and noncombustible hazardous waste, has been worked out. The procedure comprises solidifying the waste by means of an anionic slow-setting aqueous-asphalt emulsion with subsequent formation of an asphalt coating on the surface of solidified waste by spraying...

Drug utilization pattern of upper respiratory tract infections in pediatric at Najran university hospital, KSA

Upper Respiratory Tract Infections (URTIs) constitute the most common type of acute infections among children. Administration of antibiotics is the standard treatment option for most of the URTIs. However, antibiotics may be misused or overused in the URTIs treatment. The main objective of this observational study is to assess the drug utilization patterns in the treatment of URTIs among childr...

Environmental Impacts of Producing Asphalt Mixtures with Varying Degrees of Recycled Asphalt Materials

The environmental impacts of producing asphalt mixtures with different percentages of asphalt binder replacement (ABR) are assessed using the technique of life cycle assessment (LCA). In this paper, only the material production phase of the pavement life cycle is considered. To improve the quality of the LCA, a regionalized life cycle inventory (LCI) database for the Northern Illinois region is...

Effects of Recycled Concrete Aggregates on Properties of Asphalt Concrete