2010 Fiscal Year Final Research Report

Development on evaluation method of existing concrete deterioration subjected to scaling under chloride environment

Research Project

Project/Area Number	21760365
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Structural engineering/Earthquake engineering/Maintenance management engineering
Research Institution	Nihon University
Principal Investigator	KODA Yasuhiro Nihon University, 工学部, 准教授 (40328696)
Project Period (FY)	2009 – 2010
Keywords	凍害 / 融雪剤 / スケーリング劣化 / RC部材 / スケーリング深さ / 劣化予測
Research Abstract	This study aimed that the evaluation of the deteriorated existing concrete surface subjected to scaling was developed. Therefore, a quantitative evaluation method for deterioration surface of RC structures was devised. The experimental results revealed that a deterioration process of scaling was depended by existence of a reinforcing bar and an area of reinforcement. Further, it was recognized that an average scaling depth and a maximum scaling depth were in proportion to each other by the measurement of scaling for RC members. In addition, it was possible to predict deterioration process of scaling by measuring the average scaling depth and the maximum scaling depth.