Aggregates occupy more than 60% of the volume of concrete, play a main role in affecting its fresh properties as well hardened properties. The main objective of this research is to produce Self Compacting Concrete (SCC) by using a new type of coarse aggregate (Burned shale) and locally available materials in our region such as sand, limestone powder and silica fume. Experimental programme was designed to characterize the properties of fresh and hardened SCC and the performance of SCC under influence of a solution of sodium sulphate. Two cement content 450 kg/m3 and 550 kg/m3 were chosen in this research. Also silica fume was used addition with 10% and 15% of cement. Limestone Powder =10% of cement. Super plasticizer (viscocrete) was used addition with 3 % of the cement. Water cementatious ratio ranged from (0.25, 0.35). There different test methods to characteristics performance and properties of scc in the fresh state like Slump-flow test , V-funnel , L-Box , U box , Fill box .All the cube specimens of concrete mixes were removed

The study focuses on producing a new type of concrete utilizing igneous rocks (andesite and ryolite) as a coarse aggregate. Thus, four trail mixes were casted for estimating the concrete materials and proportions, also twenty-three mixes were casted with some variables. Four types of aggregate were used (gravel, dolomite, andesite and ryolite) to show the effect of aggregate type on concrete properties. Four aggregate ratio were used (1:1, 2:1, 3:2, 5:2) to show the effect of aggregate ratio on the concrete properties. Pozzolanic material (silica fume) was used with 15% of the cement, water cementatious ratio ranged from (0.22), super plasticizer (viscocrete) was used with (1.5) % of the cement. Ordinary Portland cement was used in all the mixes with cement content (900) kg/m 3 . Self-compacting concrete tests (slump flow diameter, slump flow time, L-box, and V-funnel) were prepared on concrete on its fresh phase, hardened concrete tests (compression strength, splitting strength, bending strength, and shemidet hammer) were prepared to identify the mechanical properties of concrete.

This study aims to use marble powder as a marginal by-product material (which disposal of it may cause environmental problems) in production of self-compacting concrete (SCC) to reduce the cost of cubic meter (direct cost). 11 mixtures of self-compacting concrete were designed in experimental program. Five variables were studied in this research: amount of marble powder (15% and 30% (, amount of superplasticizer (2% and 3 %(, type of mineral Additives (silica fume and fly ash (, amount of mineral additives (Silica fume 5% and 10 %)-(Fly ash 25% and 35 %(and replacement silica fume and fly ash with marble powder. Fresh concrete tests were performed are: slump flow, slump flow at T 50cm , V-funnel , V-funnel at T 5min , L-box , Fill box and GTM sieve 5mm stability test. Hardened concrete tests were performed are: compressive strength test and bending strength test. High performance SCC can be produced with range of compressive strength about (440-580) kg/cm² with marble powder only. The cheapest mixtures which have the minimum requirements to produce high performance self-compacting concrete with high strengths were that contains marble powder and the costs of them starts at (548) L.E/m³. The least costs of improvement of properties of both of fresh and hardened concrete (LE/property) were these contain marble powder.