Determination of Thermal Properties of Mineral Wool Required for the Safety Analysis of Sandwich Panels Subjected to Fire Loads

Abstract

The paper presents theoretical, experimental and numerical studies on the thermal behavior of mineral wool used in sandwich panels. The aim of this study is to investigate the thermal properties of mineral wool at elevated temperatures and provide a simple model that would allow us to determine the heat propagation in sandwich panels during a fire. The paper proposes a new method to experimentally evaluate thermal diffusivity, derived from theoretical premises. Experiments are conducted in a laboratory furnace where specimens are placed and temperatures inside specimens are measured. Different methods are used to process the test results and calculate the thermal diffusivity of mineral wool. Finally, a numerical analysis of heat transfer using the finite element method (FEM) is performed to validate the obtained thermal properties.

The Effect of Mineral Wool Fiber Additive on Several Mechanical Properties and Thermal Conductivity in Geopolymer Binder

“…The results are shown in Table 4. The tested samples have similar densities, oscillating in the range of 2.464-2.592 g/cm 3 . G2 samples are characterized by a higher porosity of 22.61% compared to G1 samples with a porosity of 20.91%.…”

“…1695 Acosal Fluid 307 (PSR) (W. R. Grace & Co.-Conn., Columbia, MD, USA) [32] and norm sand (NSD). A chemical activator (CHA) was then added to the bulk material, specifically, a mixture of an 8 M solution of NaOH and sodium water glass with a molar ratio of 3.0 and a density of 1.41 g/cm 3 was used. The ratio of water glass to NaOH was 2.5.…”

“…Due to its specific physical and chemical properties, mineral wool is a type of waste that is problematic to manage. It is even considered as a non-recyclable waste [3]. In particular, mineral wool is non-combustible, so it is not suitable as a raw material for alternative fuels [4].…”