沖縄県のR/C造公営集合住宅15団地の塩害等による建物損傷調査と被害状況の推定

概要

論文の詳細を見る
Fifteen R/C public apartment houses in Okinawa were investigated on their damage due to chloride attack. These buildings were built between 1961 and 1976. The main objective of this investigation is to estimate the percentage of damaged R/C buildings due to chloride attack in Okinawa main island and to clear the dominant cause. As a result of investigation, fourteen R/C public apartment houses have been damaged by chloride attack except for the oldest apartment house which was built in 1961. Among them thirteen apartment houses contain a lot of sodium chloride in the concrete. The amount of chloride ion is beyond the permission line according to Japanese government guide line. The oldest R/C public apartment house built in 1961 is not damaged by chloride attack. This is the reason why sea sand was not used. Most of R/C public housing built between 1966 and 1977 has been damaged by chloride attack. The chloride attack is caused by using sea sand without removing sodium chloride. The percentage of damaged R/C buildings due to chloride attack in Okinawa main island is about 30%. Nowadays, this problem is a big social problem in Okinawa.
琉球大学工学部の論文