Conductividad térmica y comportamiento mThermal conductivity and mechanical behavior of concrete in thermoactive structures
DOI:
https://doi.org/10.20868/ade.2020.4492Keywords:
Concrete, thermally active structures, thermal conductivity, compressive strength, Cemento, estructuras termoactivas, conductividad térmica, compresión.Abstract
The aim of this project is to develop and study different kinds of concrete in order to improve its thermal properties to be used in reinforced concrete structures of thermally active building systems (TABS). For this reason different specimens and testing procedures were proposed to study, on the one hand thermal conductivity of concrete made with three different types of cement (CEM I, CEM II and CEM III) and two different kinds of aggregate (limestone and siliceous) at three different levels of humidity (0%, 50% and 100%) was analized. On the other hand, compressive strength of concrete was also studied. Results from thermal tests showed that specimens made of concrete with cement CEM II, siliceous aggregate and humidity of 100% had higher values of conductivity than the other specimens; while mechanical tests showed that concrete with cement CEM I and limestone aggregate had a higher compressive strength. In conclusion, concrete made of cement type CEM II and siliceous aggregate improved the conductivity of concrete for its use on thermal active structures. Thermal conductivity was also improved by high levels of humidity in concrete. Contrary to the expectations, concrete specimens made of cement CEM III didn´t show higher thermal conductivity levels than concrete made of cement CEM I and CEM II.
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