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The effects of ceramic powder, a waste material, on the properties of lime-cement plasters were investigated in this article. The influence of the addition of the pozzolana as a supplementary cementitious material on mechanical and thermal properties of the studied materials was assessed in relation to its basic physical properties and pore structure characterization. Investigated parameters were bulk density, matrix density, open porosity, pore-size distribution, compressive strength, tensile strength, thermal conductivity and specific heat capacity. The results revealed the densifying effect of the pozzolana on the plaster microstructure as the open porosity decreased and bulk density rose to binder replacement level. Although the mean diameter of pores for plasters with higher amount of pozzolana was slightly higher, the volume of pores was lower. The presence of ceramic powder also showed a positive effect on the mechanical properties of plasters. Both compressive and tensile strength rose with increasing replacement ratio. Varying porosities were reflected in the increasing trend of thermal conductivity with rising binder replacement level. On the contrary, specific heat capacity showed the lower values the higher the amount of pozzolana.
basic physical properties, cement, ceramic powder, lime, plaster, pore system, pozzolana, thermal properties
[1] Rovnaníková, P., (eds), Omítky. Chemické a technologické vlastnosti, STOP, Praha, 2002.
[2] Cˇáchová, M., Konˇáková, D., Vejmelková, E., Keppert, M., Reiterman, P. & Cˇerný, R., The properties of innovated mortars utilizing secondary raw material. International Conference on High Performance and Optimum Design of Structures and Materials, HPSM/OPTI 2014, WIT Transactions on the Built Environment: Ostend, pp. 49–56, 2014
[3] Cˇáchová, M., Vejmelková, E., Polozhiy, K. & Cˇerný, R., Pore system and hydric properties of two different lime plasters with finely crushed brick. 2nd International Conference on Applied Physics and Material Applications, ICAPMA 2015, Key Engineering Materials: Pattaya, 2015.
[4] CˇSN EN 197-1, Cement – Part 1: Composition, specifications and conformity criteria for common cements, 2012.
[5] CˇSN EN 1015-3, Methods of test for mortar for masonry – Part 3: Determination of consistence of fresh mortar (by flow table), 2000.
[6] CˇSN EN 1015-10, Methods of test for mortar for masonry – Part 10: Determination of dry bulk density of hardened mortar, 2000.
[7] CˇSN EN 1015:11, Determining the strength of hardened mortar bending and compressive, 2000.
[8] ISOMET, In Applied Precision (online) Ltd., 2011, Bratislava, http://www.appliedp.com/en/isomet.htm
[9] Naceri, A. & Hamina, M.C., Use of waste brick as partial replacement of cement in mortar. Waste Management, 29(8), pp. 2378–2384, August 2009.
[10] Uchima, J.S., Restrepo, O.J. & Tobón, J.I., Pozzolanicity of the material obtained in the simultaneous calcination of biomass and kaolinitic clay. Construction and Building Materials, 95, pp. 414–420, July 2015.
[11] Vejmelková, E., Keppert, M., Rovnaníková, P., Keršner, Z. & Cˇerný, R., Application of burnt clay shale as pozzolan addition to lime mortar. Cement and Concrete Composites, 34(4), pp. 486–492, April 2012.