Study on the sophisticated method for controlling the crack behavior in high strength concrete

2014 Fiscal Year Final Research Report

• Project/Area Number: 26889042
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Building structures/Materials
• Research Institution: Hiroshima University
• Principal Investigator: TERAMOTO Atsushi 広島大学, 工学(系)研究科(研究院), 助教 (30735254)
• Project Period (FY): 2014-08-29 – 2015-03-31
• Keywords: 高強度コンクリート / 自己収縮 / ひび割れ / 膨張材 / 収縮低減剤

Outline of Final Research Achievements

One of the purpose of this study are to examine the mechanics of expansion which caused by expansion additives on cement paste with very low water to binder ratio, and the other purpose is to discuss the issues that is instability of effectiveness of expansion additives and shrinkage reduce admixtures in the case of used simultaneously.
As a result of our experiment, the expansion of cement paste after 1 day has a connection with production amount of calcium hydroxide. This reveals that calcium hydroxide which caused by expansion additives contribute to the expansion after 1 day. And it was observed that the time dependent change of amount of ettringite was modified by adding shrinkage reduce admixtures to cement paste which including expansion additives.

Free Research Field

コンクリート工学