One of the most important issues and challenges nowadays in Egypt is how to provide enough water for current and future needs. The great population growth, agricultural consumption, climate change, limited freshwater resources, and welfare lifestyle require more water. All these factors push the Egyptian policy to search for additional water resources. One of the considerable water resources is the ... إقراء المزيد

Rejuvenating the reclaimed asphalt pavement by crumb rubber modified binder for recycling in new pavements arouses a great interest as a sustainable paving technology that uses waste to recycle waste and hinders resource depletion. By investigating rheological and adhesion/cohesion characteristics of the asphalt binder, this study aims to divine optimal dosages of reclaimed asphalt and crumb rubber that enhance the ... إقراء المزيد

Egypt's limited water resources and rising water demand are critical to the country's economy and food security. This predicament encouraged the development of non-traditional water resources in order to bridge the gap between supply and demand for water. treated wastewater (TWW) reuse for irrigation is a viable alternative for closing this gap and conserving traditional water resources for residential and ... إقراء المزيد

Many roads in hot regions of the world are exposed to very high temperatures especially in desert areas during the summer season, where the temperature could reach more than sixty Celsius degrees. Temperature variations cause a lot of distress in flexible and rigid pavement such as rutting, vertical transverse (i.e., thermal) cracking, thermal fatigue damage, blowup/buckling, in addition to generating ... إقراء المزيد

RECENTLY, NANOMATERIALS HAVE BEEN WIDELY USED TO IMPROVE THE PROPERTIES OF ASPHALT BINDERS DUE TO THEIR UNIQUE PROPERTIES. THIS RESEARCH AIMS TO EVALUATE THE PERFORMANCE OF NANO-MODIFIED BINDERS WITH TWO DIFFERENT TYPES OF NANOMATERIALS, WHICH ARE NANO-SILICA (NS) AND NANO-CLAY (NC). EACH OF THEM WAS ADDED TO A 60/70 PENETRATION GRADE BITUMEN AT CONCENTRATIONS RANGING FROM 1% TO 4% BY ... إقراء المزيد

Reclaimed asphalt modified by crumb rubber-modified binder aroused great interest due to its advantage of using two waste materials without compromising the mechanical performance. Apart from the economic and environmental benefits, many studies revealed that excellent mechanical characteristics could be obtained at some particular rubber and reclaimed asphalt percents. In this study, a binder bond test was performed to evaluate ... إقراء المزيد

Traditionally, the 85th percentile of observed speeds is used to represent the operating speed associated with a specific site with certain geometric features. The presence of sunlight enhances the vision of drivers during daytime while visibility usually degrades during nighttime, especially on rural roads where no street lighting exists, and drivers would depend solely on their vehicle headlights. Visibility degradation ... إقراء المزيد

Cold bitumen emulsion mixtures (CBEMs) are made up of the same materials that are used in hot mixes. However, asphalt emulsion and water are used in such mixes. To date, many countries are still not using these mixes as a structure layer. This can be attributed mainly to their low resistance to rainfall, long curing time and low early strength. ... إقراء المزيد

Road pavements are pivotal to the infrastructure, transportation and ultimate efficiency of both the public and the economy. However, they are undeniably having detrimental effects on an already compromised environment. Consequently, a re-think about road pavement construction materials is of paramount importance. Cold mix asphalt (CMA) is a low carbon manufacturing approach to the production of flexible pavement material that ... إقراء المزيد

Utilizing polymers for asphalt concrete (AC) mixture modification has many drawbacks that hinder its wide implementations for roadway construction. Recently, research on employing complementary materials, such as nanomaterials, to balance negative impacts of polymers while enhancing the AC mixture’s performance has received great attention. This study aimed to investigate the effect of incorporating nanoclay (NC) particles on the performance of ... إقراء المزيد