Keywords: Concrete
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Design of micro-electro-mechanical systems-driven environmental sensor for steel corrosion detection in concrete using sacrificial anode metal sheets
This study develops a MEMS (Micro-Electro-Mechanical Systems)-based monitoring system incorporating MEH (Micro-Energy Harvester) technology to identify chloride-induced corrosion-prone areas in RC structures. The proposed system integrates sacrificial anode metal sheets (SAMS) into MEMS–MEH devices, enabling simultaneous corrosion detection and energy harvesting. In tracking corrosion progress through frequency shifts while generating power, the system operates without batteries or external power. The results help define target operating frequencies for reliable MEMS–MEH performance in predicting corrosion conditions in RC structures.
Nicharin Nithimethaporn, Katsufumi Hashimoto, Hiroyuki Mitsuya, Hisayuki Ashizawa, Takuma Ishiguro, and Wanchai Yodsudjai
Transport of radioactive elements in concrete due to utilization of recycled aggregate contaminated with nuclides
In the future, a huge amount of concrete waste will be generated in preparation for the demolition of nuclear power plants. From the perspective of rational processing and disposal, it is possible to reuse this waste, particularly waste with low levels of radioactivity, as recycled aggregate. Clarifying how radioactive materials migrate inside concrete is extremely important in building a safe and secure society.
Yingyao Tan, Takafumi Sugiyama, Katsufumi Hashimoto, and Junxiao Liu
Construction and Bulding Materials, Volume 471, 11 April 2025, 140689