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Evaluation and Selection of Candidate Thermal Insulation Materials for NIST SRM 1450d, Fibrous-Glass Board



Robert R. Zarr, Dennis D. Leber


The evaluation of candidate thermal insulation materials for National Institute of Standards and Technology (NIST) Standard Reference Material (SRM) 1450d Fibrous-Glass Board is presented. The paper focuses on a preliminary study to assess the technical qualifications of the candidate molded fibrous-glass materials for an SRM material. The assessment considers the homogenitey of the material with regards to material properties that have a direct impact on thermal conductivity, namely, bulk density and thickness. In this study, a sample of ten specimens of each candidate material was obtained from two manufacturers. The key parameters of interest in assessing the material uniformity were the variability of specimen density and within- and between-specimen thickness. The capability of the manufacturer to provide specimens with material properties consistently within self defined tolerance limits was also key in the selection of the SRM candidate material. The paper presents thermal conductivity measurements at 297 K determined by a heat-flow-meter apparatus (ASTM Test Method C 518). Results are compared with similar measurements on previous lots of the SRM 1450 Series. The paper outlines the approach for development of SRM 1450d including, the SRM philosophy, historical background, and assessment approach.
Proceedings Title
Thermal Conductivity 30/Thermal Expansion 18
Conference Dates
August 29-September 2, 2009
Conference Location
Pittsburgh, PA
Conference Title
30th International Thermal Conductivity Conference and 18th International Thermal Expansion Symposium


building technology, density, fibrous glass board, heat flow meter, standard reference material, SRM, thermal insulation


Zarr, R. and Leber, D. (2009), Evaluation and Selection of Candidate Thermal Insulation Materials for NIST SRM 1450d, Fibrous-Glass Board, Thermal Conductivity 30/Thermal Expansion 18, Pittsburgh, PA, [online], (Accessed April 14, 2024)
Created September 2, 2009, Updated February 19, 2017