Assessment of internal relative humidity and temperature of cement based materials – parallel study using two sensor systems

Author(s): Martin Klun, Violeta Bokan Bosiljkov, Samo Beguš, Slaven Ranogajec, Zvonko Jagličić
Paper category: Proceedings
Book title: SynerCrete’18: Interdisciplinary Approaches for Cement-based Materials and Structural Concrete: Synergizing Expertise and Bridging Scales of Space and Time Vol. 1 & 2
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 111-116
Total Pages: 6
Language : English

Abstract: A custom made sensor system for measuring the temperature and relative humidity inside the cement-based materials (CBMs) was prepared and its functionality compared with a commercially available ConSensor 2.0 system. The obtained results show adequate functioning of the custom made sensor when measuring temperature inside the CBMs. Measurements of relative humidity were not yet compared to reference sensor measurements. However, continuous decrease of relative humidity at accelerated drying of CBM confirmed adequate protection of the sensor and thus its resistance to highly alkaline environment. Additionally, ConSensor 2.0 system was able to follow the cement hydration process through measurements of the CBMs’ electrical conductivity (C) in a similar way as the ultrasonic P- waves. Based on the obtained C(t) and dC/dt(t) profiles we were able to estimate initial and final setting times and the time of the most intensive development of the hydration products.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00