Abstract:

This study includes the effect of reducing coarse aggregate in concrete mixture on its softening and hardening properties, where the concrete mixtures were prepared with varying proportions of coarse aggregate and replaced with fine aggregate (30%, 40%, 50

Hardened concrete was studied by means of a compression resistance test. The average compressive strength of three samples taken , and that is after the concrete has been treated by immersing in water for a period of 7 days, 14 days, and 28 days.

The operational degree of softened concrete was determined for all the above mentioned ratios, where six concrete mixtures were prepared, with a total of 60 cubes, at a ratio of mixing 1:2:4 cement and aggregate (fine, coarse) and by adding water to cement in a ratio of 0.5, the results indicated that the concrete of (40%) coarse aggregate was most suitable for use in desert areas.

Key Words: Coarse aggregate, Fine aggregate, Compressive strength.

إن صناعة و استثمار الموارد المحلية المتاحة بكفاءة تعد من ركائز التنمية المعاصرة و المستدامةو رافدا للموارد الاقتصادية و الناتج المحلي لاي مجتمع، و في منطقة القواسم تعد صناعة الفخار التقليدي و الحديثمن أهم الموارد الإقتصادية القابلة للتنمية و ذلك لأن 80% من المواد الخام الطبيعية اللازمةلصناعتها تتوافر بالمنطقة، ناهيك عن دورها المهم في الإستثمار السياحي و الثقافي.

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