Influence of different ambient temperatures on the thermal properties of fiber-reinforced structural lightweight aggregate concrete
Document Type
Article
Publication Date
6-1-2022
Abstract
This study reports the influence of different climatic ambient temperatures on the thermal properties of fiber-reinforced lightweight aggregate concrete (LWAC). Lightweight expanded clay aggregates (LECA) with steel (ST) and polypropylene fibers were used in the mix proportions. The steady-state thermal test was performed on concrete samples at the oven-dry state with the measurement taken at six different climatic ambient temperatures of 0 degrees C, 10 degrees C, 20 degrees C, 30 degrees C, 40 degrees C, and 50 degrees C. The results show a linear dependence of thermal conductivity, specific heat, thermal diffusivity and thermal effusivity of fiber-reinforced LWACs against the different ambient temperatures. These ambient temperature variations are discussed as a function of the thermal properties of fiber-reinforced LWAC. The thermal conductivity and thermal diffusivity decrease linearly between 0 degrees C and 50 degrees C, whilst the specific heat and thermal effusivity increase linearly between 0 degrees C and 50 degrees C. Equations with strong correlations to predict thermal properties of fiber-reinforced LWAC were proposed based on the results of this study. The significance of this research is to propose the dynamic ambient temperature-dependent thermal properties equations that can be used in the energy analysis of the buildings.
Keywords
Fiber-reinforced concrete, Lightweight aggregate concrete, Steel fiber, Polypropylene fiber, Temperature-dependent thermal properties, Thermal conductivity, Specific heat, Thermal diffusivity, Thermal effusivity
Divisions
Architecture
Funders
None
Publication Title
Buildings
Volume
12
Issue
6
Publisher
MDPI
Publisher Location
ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND