Strong background about cement, concrete, properties and manufacturing of buildings materials. Long experience about the various method for determining and evaluating the different characteristics of the raw material used in building industry. Strong background about the various types of concrete aggregate and have excellent experience about alkali aggregate reaction especially the carbonate one. In addition to the durability of concrete in various aggressive media. I was formulating man for concrete admixture and cement products for many companies for construction chemicals . Have excellent experience about recycling of some of industrial waste, construction & demolition waste and agricultural residue in construction sector. Head of the team work for the preparation of the Egyptian green code of practices for recycling and pollution of construction and demolition projects. A member of team work for the preparation of the Egyptian code of practics for waste recycling in construction sector. Experts in accreditation of the new projects (materials & resources) for the Egyptian green building rating system.