Fikret Merih KILIÇ, Hediye YORULMAZ, Sümeyye ÖZUZUN, Uğur DURAK, Serhan İLKENTAPAR, Okan KARAHAN, Cengiz ATİŞ

Comparison of Mechanical and Physical Properties of Screed with and without Expanded Polystyrene (EPS) Particles

In this study, in order to observe the mechanical and physical properties of ordinary screed, sandy-lightweight screed and lightweight screed samples, expanded polystyrene (EPS) was used as fine aggregate and lightweight screed systems were produced by replacing sand at 100%, 50% and 0%. Samples of cement dosages of 250, 300, 350 kg/m3 were produced for lightweight screeds, sandy-lightweight screeds and ordinary screeds. Unit weight, water absorption capacity, flexural strength, compressive strength, fire resistance, abrasion and thermal conductivity tests were performed on the produced screed systems. As a result of the research, it was determined that as EPS ratio increases in screed system; unit weights decreased, water absorption rates increased. Besides, the flexural and compressive strengths, fire and abrasion resistance are also decreased. However, it was observed that the thermal conductivity coefficient reduced with the increment of EPS particles in the screed. In normal, sandy-lightweight and lightweight screeds, it was determined that as the cement dosage increased; the unit weights, flexural and compressive strengths, fire and abrasion resistance increased, water absorption capacity and the thermal conductivity coefficient decreased.

Keywords:

EPS, light-weight screed, screed, strength,

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A. Moreira, J. António, and A. Tadeu, “Lightweight screed containing cork granules: Mechanical and hygrothermal characterization,” Cem. Concr. Compos., vol. 49, pp. 1–8, 2014, doi: 10.1016/j.cemconcomp.2014.01.012.
B. Chen and N. Liu, “A novel lightweight concrete-fabrication and its thermal and mechanical properties,” Constr. Build. Mater., vol. 44, pp. 691–698, 2013, doi: 10.1016/j.conbuildmat.2013.03.091.
A. Ben Fraj, M. Kismi, and P. Mounanga, “Valorization of coarse rigid polyurethane foam waste in lightweight aggregate concrete,” Constr. Build. Mater., vol. 24, no. 6, pp. 1069–1077, 2010, doi: 10.1016/j.conbuildmat.2009.11.010.
C. Yang and R. Huang, “Approximate Strength of Lightweight Aggregate Using Micromechanics Method,” Adv Cem Based Mater, vol. 7, pp. 133–138, 1998.
E. Yasar, C. D. Atis, A. Kilic, and H. Gulsen, “Strength properties of lightweight concrete made with basaltic pumice and fly ash,” Mater. Lett., vol. 57, no. 15, pp. 2267–2270, 2003, doi: 10.1016/S0167-577X(03)00146-0.
T. W. Bremner, “Environmental Aspects of Concrete: Problems and Solutions,” Proc. First Russ. Conf. Concr. Reinf. Concr. Probl., no. Moscow, Russia, pp. 232–246, 2001.
R. Sri Ravindrarajah and A. J. Tuck, “Properties of hardened concrete containing treated expanded polystyrene beads,” Cem. Concr. Compos., vol. 16, no. 4, pp. 273–277, 1994, doi: 10.1016/0958-9465(94)90039-6.
N. H. Ramli Sulong, S. A. S. Mustapa, and M. K. Abdul Rashid, “Application of expanded polystyrene (EPS) in buildings and constructions: A review,” J. Appl. Polym. Sci., vol. 136, no. 20, pp. 1–11, 2019, doi: 10.1002/app.47529.
D. S. Babu, K. Ganesh Babu, and T. H. Wee, “Properties of lightweight expanded polystyrene aggregate concretes containing fly ash,” Cem. Concr. Res., vol. 35, no. 6, pp. 1218–1223, 2005, doi: 10.1016/j.cemconres.2004.11.015.
S. Doroudiani and H. Omidian, “Environmental, health and safety concerns of decorative mouldings made of expanded polystyrene in buildings,” Build. Environ., vol. 45, no. 3, pp. 647–654, 2010, doi: 10.1016/j.buildenv.2009.08.004.
D. S. Babu, K. Ganesh Babu, and W. Tiong-Huan, “Effect of polystyrene aggregate size on strength and moisture migration characteristics of lightweight concrete,” Cem. Concr. Compos., vol. 28, no. 6, pp. 520–527, 2006, doi: 10.1016/j.cemconcomp.2006.02.018.
TS EN 1015-11, Mortar Testing Method, Part 11. Measurement of Compressive and Flexural Tensile Strength of Mortar. Ankara: TSE, 2000.
TS 2824 EN 1338, Concrete paving blocks - Requirements and test methods. Ankara, TURKEY: TSE, 2005.
E. K. Akpinar and F. Koçyigit, “Thermal and mechanical properties of lightweight concretes produced with pumice and tragacanth,” J. Adhes. Sci. Technol., vol. 30, no. 5, pp. 534–553, 2016, doi: 10.1080/01694243.2015.1111832.
H. Oktay, R. Yumrutaş, and A. Akpolat, “Mechanical and thermophysical properties of lightweight aggregate concretes,” Constr. Build. Mater., vol. 96, pp. 217–225, 2015, doi: 10.1016/j.conbuildmat.2015.08.015.
M. Mohammad, E. Masad, T. Seers, and S. G. Al-Ghamdi, “Properties and microstructure distribution of high-performance thermal insulation concrete,” Materials (Basel)., vol. 13, no. 9, 2020, doi: 10.3390/ma13092091.
O. Sengul, S. Azizi, F. Karaosmanoglu, and M. A. Tasdemir, “Effect of expanded perlite on the mechanical properties and thermal conductivity of lightweight concrete,” Energy Build., vol. 43, no. 2–3, pp. 671–676, 2011, doi: 10.1016/j.enbuild.2010.11.008.
R. Demirboǧa and R. Gül, “The effects of expanded perlite aggregate, silica fume and fly ash on the thermal conductivity of lightweight concrete,” Cem. Concr. Res., vol. 33, no. 5, pp. 723–727, 2003, doi: 10.1016/S0008-8846(02)01032-3.
R. Demirboǧa and R. Gül, “Thermal conductivity and compressive strength of expanded perlite aggregate concrete with mineral admixtures,” Energy Build., vol. 35, no. 11, pp. 1155–1159, 2003, doi: 10.1016/j.enbuild.2003.09.002.
J. Khedari, B. Suttisonk, N. Pratinthong, and J. Hirunlabh, “New lightweight composite construction materials with low thermal conductivity,” Cem. Concr. Compos., vol. 23, no. 1, pp. 65–70, 2001, doi: 10.1016/S0958-9465(00)00072-X.
D. K. Panesar and B. Shindman, “The mechanical, transport and thermal properties of mortar and concrete containing waste cork,” Cem. Concr. Compos., vol. 34, no. 9, pp. 982–992, 2012, doi: 10.1016/j.cemconcomp.2012.06.003.
A. Benazzouk, O. Douzane, K. Mezreb, B. Laidoudi, and M. Quéneudec, “Thermal conductivity of cement composites containing rubber waste particles: Experimental study and modelling,” Constr. Build. Mater., vol. 22, no. 4, pp. 573–579, 2008, doi: 10.1016/j.conbuildmat.2006.11.011.
N. Liu and B. Chen, “Experimental study of the influence of EPS particle size on the mechanical properties of EPS lightweight concrete,” Constr. Build. Mater., vol. 68, pp. 227–232, 2014, doi: 10.1016/j.conbuildmat.2014.06.062.