Monitoring of the development of hydration heat in concrete
During the setting of concrete, hydration heat is released, causing a pronounced increase of the temperature of the structure. This temperature increase only slowly diminishes because of the low thermal conductivity and high heat capacity of concrete. The knowledge of the temporal and spatial temperature development in the concrete is essential to assess its strength and the risk of crack propagation.
Fibre-optic temperature measurement is used to control the hydration heat development in mass concrete, which is responsible for build-up of thermal stresses and the associated crack propagation, e.g. in dam construction. With the cost-effective temperature monitoring along the cables in the boreholes, the temperature distribution in the setting concrete can be spatially recorded, simultaneously at many thousands of measuring points. In addition, the thermal material parameters of the concrete, thermal conductivity and heat capacity, can be determined along the cable by using hybrid fibre optic cables.
GTC Case Study
- Temperature Monitoring of Multiple Borehole Heat Exchangers
- 2017 DTS Fabritius
- 2016 Dornstädter, Retrofit
- 2015 Dornstädter, LEAKAGE DETECTION TEMPERATURE AS A TRACER
- 2015 Dornstädter, Temperaturmessung im Wasserbau – Sichere Überwachung von Dämmen und Deichen seit mehr als 60 Jahren
- 2014 Dornstädter, Full Automatic Leakage Detection at Ilisu Dam by the Use of Fibre Optics
- 2011 Aufleger, Distributed fiber optic temperature measurements in embankment dams with central core – new benchmark for seepage monitoring
- 2010 Heske Der Enhanced-Geothermal-ResponseTest als Auslegungsgrundlage und Optimierungstool
- 2010 Dornstädter In Situ Detection of Internal Erosion
- 2009 Aufleger DFOT monitoring in CFRDs – Technical gimmick or useful complementary monitoring system?