2013 Fiscal Year Final Research Report

Inspection and repair methods on frost damage of concrete based on evaluation of scaling using gloss meter

Research Project

Project/Area Number	23560657
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Building structures/materials
Research Institution	Hokkaido University
Principal Investigator	HASEGAWA Takuya 北海道大学, 工学(系)研究科(研究院), 准教授 (30360465)
Project Period (FY)	2011 – 2013
Keywords	凍害 / コンクリート / スケーリング / 光沢度
Research Abstract	In this study, we dealt with frost damage of concrete such as scaling, and investigated the inspection and repair methods on frost damage of concrete based on evaluation of scaling using gloss meter with thin aluminum foil. It was obtained surface roughness from the glossiness, and estimated amount of scaling from the surface roughness. According to the results, we proposed the equation for estimation of concrete weight loss from glossiness, and also proposed the equation for progress prediction of scaling based on results of experiments. We studied appropriate repair methods for deteriorated concrete and carried out field survey of actual structures located in cold region for verification of our proposed methods. The survey results showed that the state of scaling measured by the proposed method matched the results by the RILEM standard method based on visual observation.