Development of nano-pore model to clarify microscopic phenomena in concrete

2014 Fiscal Year Final Research Report

• Project/Area Number: 25709034
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Civil engineering materials/Construction/Construction management
• Research Institution: The University of Tokyo
• Principal Investigator: SAKAI Yuya 東京大学, 生産技術研究所, 助教 (40624531)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: コンクリート / 微小模型流路 / 閾細孔径 / 超臨界乾燥 / FIB-SEM

Outline of Final Research Achievements

The objective of this study was to achieve quantitative evaluation of mass transfer in concrete and to clarify the mechanism of volume change which is caused by moisture transport. Firstly, micro pore model in concrete is developed by preparing micro channel on cement paste without pore on its surface. The mass transport in concrete was successfully evaluated with threshold pore, one of the indicators of pore structure. FIB-SEM was adopted to observe three dimensional pore structure in concrete with the dissolution of 10 nm. Supercritical Ar was applied to study the mechanism of volume change due to moisture loss.

Free Research Field

コンクリート工学