若材齢における超速硬セメントコンクリートの新旧コンクリートの打継目に関する研究

抄録

The objective of this study is to investigate the joint strength characteristics of regulated set cement concrete with construction joint at early age. Regulated set cement is used in case of an emergency repair works for road bridge and the other concrete structures. On this repair works, surface treatment is useful to achieve good bond between new concrete and old concrete. Usually the surface of construction joint were treated by shot-blast, water-jet or spreading epoxy resin, etc. Various studies have been conducted on the joint strength characteristics. however, a few studies have targeted the joint strength characteristics at an early age. Therefore, in this study the effect of surface treatment on joint strength at an early age is investigated. As the results, it was shown that joint strength is affected by surface treatment and age, etc.