Properties of concrete with different types of coarse aggregate

The aggregate is defined as ”granular material” of mineral composition. Itcan be used in road construction and concrete mixes. Aggregates are the importantconstituents in concrete, the mere fact that they occupy 70 to 80 percent of theconcrete volume.So their properties greatly influence the properties of fresh and hardenedconcrete. The present work aimed at determining the effects of the use differenttypes of coarse aggregate namely GRAVEL, DOLOMITE, BASALT and AIR-COOLED SLAG at different cement contents (250, 350, 450) Kg/m3 on themechanical properties at (7, 28, 90) days and the durability of concrete. AJso theeffect of high-elevated· temperatures 200, 400, 600, and 800°C on the concrete ofthe same aggregate types and cement contents is determined The mechanicalproperties were the compressive strength, the tensile splitting strength, flexuralstrength and bond strength. The durability were the abrasion resistance, sulphateresistance and corrosion activity.It was found that, the strength properties of slag concrete is the best withcomparison to the other types of Aggregate for all different cement ratios used asthe dolomite concrete is the lowest at C. C = 250 Kg/m3 only.