CORROSION OF INFRASTRUCTURE WITHIN MADINAT YANBU AL-SINAIYAH, SAUDI ARABIA

摘要

Construction of sister cities of Madinat AI-Jubail Al-Sinaiyah in eastern Saudi Arabia and Madinat Yanbu A1-Sinaiyahrn(MYAS) in western Saudi Arabia began in the mid-1970's to promote industrial development and diversification of thernKingdom of Saudi Arabia. MYAS resides on the Red Sea approximately 350 km north of Jeddah. The environmentalrnconditions in the Middle East are considered the most aggressive in the world. During summer months, temperatures inrnMYAS frequently exceed 40℃, with temperature variations of as much as 20℃ per day. Relative humidity variations of 40rnto 100% over a 24-hour period are not uncommon.rnResiding on coastal flats of the Red Sea, MYAS has a relatively high groundwater table, close to the ground surface.rnThe soils of the region are laden with salt, exposing concrete structures to wet high-chloride environments. Prematurerndeterioration of concrete structures has been experienced due to chloride-induced corrosion of reinforcing steel. Repairs ofrndeteriorating concrete have been ongoing. Case histories of deteriorating structures are presented to characterize degradationrnmechanisms as well as repair methodologies.