Impact of Weathering Grade on the Petrological and Engineering Properties of Some Egyptian Metavlocanics for Utilization as Concrete Aggregate.

Abstract

In this work, all the data of field observation, geochemical, geological, petrographical, mechanical, physical data and concentrated laboratory works have been collected and create to extract the following conclusions: 1- Characterization of the engineering properties of metavolcanics rocks can provide a base for a more rational approach to use these rocks in civil engineering works. 2- Characterization of the physical and mechanical properties can be helpful both for early selection for building stone. The selected areas in the Central Eastern Desert embraces Ambagi and Sid areas and in Southern Eastern Desert are Shadli and Idfu Marsa Alam area are made up of porphyritic metabasalt, olivine metabasalts, basaltic meta-andesite , meta-andesite, metadacite and metarhyolite. Chemical analysis (XRF) was carried out to define the mineral composition and to know the nature and degree of alterations of the various rock units from the selected area.