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7 - MATERIALS

                7-1 Concrete properties


               Reinforced concrete structures are designed in accordance with (SBC1101). The

               materials described below are specified and used as a basis for design.

                  Cement: Cement shall conform to ASTM C150/C150M. Fly ash and natural

                    pozzoland shall conform to ASTM C618. Slag cement shall conform to ASTM

                    C989. Silica fume shall conform to ASTM C1240.


                  Aggregates: Aggregates shall conform to ASTM C33/C33M.

                    Maximum aggregate size:


                    The nominal maximum size of course aggregate shall not exceed one –fifth the

                    narrowest distance between side of forms or tree-fourths the clear spacing

                    between reinforcing bars or between a bar and the side of the form.

                  Admixtures: water reduction and setting time modification admixture shall

                    conform to ASTM C494.producing flowing concrete admixture shall conform

                    to ASTM C1017


               •  Water: water shall conform to ASTM C1602/C1602M



               The design compressive strength (F`c) of concrete, as measured and tested on


               cylinders, at 28 days, will be as follows:
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