Hossam Ahmed

• Doctor of Philosophy
• Professor at Benha University

The properties of six locally manufactured ordinary Portland cements supplied from different sources were evaluated, through chemical, physical and mechanical testing. The cements delivered fulfil the requirements of the ESS373/91 for ordinary Portland cement and comply with type II Portland cement as classified in the ASTM C 150. The tested sample...

An air permeability apparatus is developed to monitor the air permeation properties of the near-surface layer of concrete, covercrete. The effect of various parameters on the permeation properties of various concrete mixes are evaluated. These include the water/cement ratio, the age size and grading, the curing regime and the concrete age. The deve...

One of the most recent international concern in the field of building materials is the phenomenon of the deterioration of hardened concrete structures moist stored at room temperature after being subjected to heat treatment, such as, pre-cast steam cured concrete members. This phenomenon was mostly attributed to the “delayed ettringite formation (D...

During the last few years, in Egypt, there has been an increased acceptance of the advantages of replacing part of the commonly used Portland cements by fine additives, namely, pulverized fuel ash (PFA), ground granulated blast-furnace slag (GGBS) and silica fume (SF). These materials are well known to improve the concrete properties such as lower...

In many parts of the world, transverse and longitudinal cracking of asphalt pavements is a problem that can result in costly maintenance and often requires expensive rehabilitation of the roads. Surface cracking of asphalt pavement can be the result of poor mix design, fatigue due to traffic loads, thermal stresses, presence of cracks in the old pa...