Development of hazard map concerning Thaumasite form caused by sulfate attack in Japan based on material science

Research Project

Project/Area Number	15K18099
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Civil engineering materials/Construction/Construction management
Research Institution	Tohoku University
Principal Investigator	MIYAMOTO Shintaro 東北大学, 工学研究科, 助教 (60709723)
Project Period (FY)	2015-04-01 – 2017-03-31
Project Status	Completed (Fiscal Year 2016)
Budget Amount *help	¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000) Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000) Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords	Thaumasite / エトリンガイト / AFm相 / 硫酸塩 / タウマサイト / 硫酸塩劣化 / カルサイト / ドロマイト / ジプサム / 二次鉱物 / 化学的侵食
Outline of Final Research Achievements	The purpose of this study was to clarify the impact of inside/outside environment to the risk of thaumasite formation through various experiment results. As a result, it was confirmed that thaumasite tends to precipitate when dolomite is mixed in cement rather than calcite, monocarbonate is hardly formed to ettringite. These results shed light on various mechanisms of transformation of cement hydrate caused by sulfate attack.

Report

(3 results)