.Mansour Ibrahim Al-joaid, mohammad Awad Al-sailaiy, Abdulkhaliq Khader Al-rubaie, Wassem Hashem Baha

The safety of drinking water supply has critical importance to the quality of life, people's health and public welfare. However, water main break is becoming more and more frequent and acute. These breaks are very costly to repair and cause many problems including but not limited to flooding, blocking traffic, wasting water resources and contaminating drinking water. Water utilities, due to a limited budget, must use their resources wisely and proactively by prioritizing the pipe-fixing work..

Basfar, Salem Yousef

In this project, the effect of size on concrete specimens with solid and hollow cross sections subjected to compression will be studied. The project is designed to reduce the quantity of concrete and thus reduce the cost with the condition of high quality. At the beginning of the project, a wooden cube molds with areas (20 * 20, 15 * 15) cm2 with a various heights, On the other hand, the plastic cylindrical molds with diameters (15, 20 and 25) cm with a various heights, these molds were equipped for the solid specimens. For hollow specimens dimensions are similar to solid, but in addition the internal areas foe cubes are (10* 10,5 * 5) cm2 , the internal cylindrical diameters for hollow specimens are ( 5.5, 10, and 15) cm.