Materiales de Construcción, Vol 70, No 338 (2020)

Influence of sawdust particle size on fired clay brick properties


https://doi.org/10.3989/mc.2020.04219

G. Thalmaier
Technical University of Cluj Napoca, Romania
orcid https://orcid.org/0000-0003-2762-6110

N. Cobîrzan
Technical University of Cluj Napoca, Romania
orcid https://orcid.org/0000-0002-6904-0436

A. A. Balog
Technical University of Cluj Napoca, Romania
orcid https://orcid.org/0000-0002-3587-6438

H. Constantinescu
Technical University of Cluj Napoca, Romania
orcid https://orcid.org/0000-0003-3290-3290

M. Streza
National Institute for Research and Development of Isotopic and Molecular Technologies,, Romania
orcid https://orcid.org/0000-0002-0030-8625

M. Nasui
Technical University of Cluj Napoca, Romania
orcid https://orcid.org/0000-0002-4792-2032

B. V. Neamtu
Technical University of Cluj Napoca, Spain
orcid https://orcid.org/0000-0003-0666-8303

Abstract


This study investigates the effect of adding different size fractions of the same pore forming agent (sawdust) on the material’s compressive strength and heat transfer. The samples were dry pressed and fired at high temperature inside an oven. Phase transformations were evidenced by a combination of differential thermal analysis, thermogravimetry and mass spectrometry (DTA-TGA-MS) and X-ray diffraction (XRD) techniques, in the temperature range of 24-900 ºC. Image analysis (IA) and compression tests were performed to explain the mechanical behaviour of the samples. The thermal conductivity was obtained by using combined photopyroelectric calorimetry (PPE) and lock-in thermography (LIT) techniques. The pressing direction has an impact on the distribution of pores and the heat transfer by conduction.

Keywords


Brick; Compressive strength; Thermal analysis; Wood; Pore size distribution

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