MIC PROPORTION AND MATERIAL COMPOSITION OF 70-100 YEAR OLD MORTAR USED FOR HOLY RESURRECTION CATHEDRAL

Abstract

The Holly Resurrection Cathedral (Nikorai do), a designated important cultural property, is over 100 years old. Repairs and restorative construction were made following the Great Kanto Earthquake of 1923 but 70 years have passed with no further extensive maintenance. After surveying the weathering of Cathedral, repair work to preserve the cultural property is under way. Results of physical investigation and chemical analysis of nine 70 to 100 year old mortar samples to determine mix proportion, material composition and condition of deterioration are presented in this report.