INVESTIGATION AND STUDY ON EXTERIOR WALLS OF REINFORCED CONCRETE STRUCTURES IN GUNKAN ISLAND

Abstract

Existing reinforced concrete structures in Gunkan Island began to construct since 1916, it was said to be the oldest class of RC high-rise apartment buildings in Japan. In the RC structures, the integrity evaluation of exterior wall finishing materials and analyses of various bricks in the wall were investigated. Most of the buildings had the peeling and the separation in finishing materials, the average defective portion was approximately 25%. Red bricks and black bricks in the building number 16 were not being fired during manufacturing, and were considered to have been molded by gypsum or the like as a binder.