Abstract
This paper presents the experimental results on flexural behaviour of reinforced concrete beams and slabs made of lightweight foamed mortar with density ranged from 1700 to 1800 kg/m3. Beam specimens consist of seven lightweight foamed mortar beams and three normal weight concrete beams acted as the control sample. Whereas, slab specimens contain two lightweight foamed mortar slabs and two normal weight concrete slabs. Four types of lightweight foamed mortar with different cement-sand ratios and water-cement ratios designated as LW-1, LW-2, LW-3 and LW-4 were produced in order to achieve targeted compressive strength of 20 MPa at 28 days for structural usage. The results showed that reinforced lightweight foamed mortar beams sustained about 8% to 34% lower ultimate load as compared to normal weight reinforced concrete with same reinforcement configuration. However, lightweight foamed mortar slab sustained higher ultimate load, averagely 18% as compared to normal weight slab. Apart from that, it was observed that the both reinforced lightweight foamed mortar beams and slabs were weak in resisting shear forces nonetheless flexural failure cannot be ignored entirely due to the presence of excessive yielding of the steel strain data.
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Aldridge, D. (2005). “Introduction to foamed concrete: What, why, how?” Use of Foamed Concrete in Construction, Thomas Telford, London, pp.1–14.
ASTM (2013). ASTM C1437-13 standard test method for flow of hydraulic cement mortar, American Society for Testing and Materials International, United States.
Awang, H., Mydin, M. A. O., and Roslan, A. F. (2012). “Effect of addictive on mechanical and thermal properties of lightweight foamed concrete.” Advances in Applied Science Research, Vol. 3, No. 5, pp. 3326–3338, DOI: http://pelagiaresearchlibrary.com/advancesin-applied-science/vol3-iss5/AASR-2012-3-5-3326-3338.pdf.
Bernardo, L. F. A., Nepomuceno, M. C. S., and Pinto, H. A. S. (2016). “Flexural ductility of lightweight-aggregate concrete beams.” Journal of Civil Engineering and Management, Vol. 22, No. 5, pp. 622–633, DOI: 10.3846/13923730.2014.914094.
BSI (2004a). BS EN 1992-1-1:2004 Eurocode 2: Design of concrete strucutre, Part 1-1: General Rules and Rules for Building, British Standard Institution, London.
BSI (2004b). BS EN 1994-1-1:2004 Eurocode 4: Design of composite steel and concrete structures, Part 1-1: General rules and rules for buildings, British Standard Institution, London.
BSI (2009). BS EN 12390-3 Testing Hardened Concrete Part 3: Compressive strength of test specimens, British Standard Institution, London.
BSI (2011). BS EN 197-1:2011 Composition, specifications and conformity criteria for common cements, British Standard Institution, London.
Buyukozturk, O. (2004). Shear failures, shear transfer and shear design, Massachusetts Institute of Technology, Boston.
Clarke, J. L. (1993). Structural lightweight aggregate concrete, Blackie Academic and Professional, Routledge, UK.
Hulimka, J., Krzywa, R., and Jedrzejewska, A. (2017). “Laboratory tests of foam concrete slabs reinforced with composite grid.” Procedia Engineering, Vol. 193, pp. 337–344, DOI: 10.1016/j.proeng.2017.06.222.
Johnson, E. A. F. and Li, Q. M. (2012). “Structural behaviour of composite sandwich panels with plain and fibre-reinforced foamed concrete cores and corrugated steel faces.” Composite Structures, Vol. 94, No. 5, pp. 1555–1563, DOI: 10.1016/j.compstruct.2011.12.017.
Jones, M. R. and McCarthy, A. (2005). “Preliminary views on the potential of foamed concrete as a structural material.” Magazine of Concrete Research, Vol. 57, No. 1, pp. 21–31, DOI: 10.1680/macr.57.1.21.57866.
Kong, F. K. and Evans, R. H. (1987). Reinforced and pre-stressed concrete (3rd ed.), E & FN Spon, Van Nostrand ReinNew York.
Lakkavalli, B. S. and Liu, Y. (2006). “Experimental study of composite cold-formed steel C-section floor joists.” Journal of Constructional Steel Research, Vol. 62, pp. 995–1006, DOI: 10.1016/j.jcsr.2006.02.003.
Lee, T. K. and Pan, A. D. E. (2003). “Estimating the relationship between tension reinforcement and ductility of reinforced concrete beam sections.” Engineering Structure, Vol. 25, No. 8, pp. 1057–1067, DOI: 10.1016/S0141-0296(03)00048-8.
Legatski, L. M. (1978). Cellular concrete, Significance of tests and properties of concrete and concrete-making materials STP 169B (pp.836-851), American Society for Testing and Materials, Baltimore.
Lim, S. K., Tan, C. S., Zhao, X., and Ling, T. C. (2014). “Strength and toughness of lightweight foamed concrete with different sand grading.” KSCE Civil Engineering. In press, DOI: 10.1007/s12205-014-0097-y.
Nambiar, E. K. K. and Ramamurthy, K. (2008). “Fresh state characteristics of foam concrete.” Journal of Materials in Civil Engineering, Vol. 20, pp. 111–117, DOI: 10.1061/(ASCE)0899-1561(2008)20:2(111).
Neville, A. M. (2011). Properties of Concrete (5th ed.), Pearson Education Limited, England.
Pillai, S. U. and Menon, D. (2009). Reinforced concrete design, (3rd ed.), Tata McGraw-Hill Education Private Limited, New Delhi.
Rahman, M. Z. A. A., Rahman, I. A., and Zaidi, A. M. A. (2011). “Study on behavior of foamed concrete under quasi static indentation test.” European Journal of Scientific Research, Vol. 51, No. 3, pp. 424–432, www.clcir.com/index.php/download/study.
Ramamurthy, K., Nambiar, E.K.K. and Ranjani, G.I.S. (2009). “A classification of studies on properties of foam concrete.” Cement and Concrete Composites, Vol. 31, pp. 388–396, DOI: 10.1016/j.cemconcomp.2009.04.006.
Rashid, M. A. and Mansur, M. A. (2005). “Reinforced high-strength concrete beams in flexure.” ACI Structural Journal, Vol. 102, No. 3, pp. 462–471, cvl.araku.ac.ir/download/hsrc-beam.
Shetty, M. S. (2006). Concrete technology: Theory and practice, Ram Nagar, S. Chand & Company Ltd, New Delhi.
Valore, R. C. (1954). “Cellular concrete part 1: composition and method of production.” ACI Journal, Vol. 50, pp. 773–796.
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Lee, Y.L., Lim, J.H., Lim, S.K. et al. Flexural Behaviour of Reinforced Lightweight Foamed Mortar Beams and Slabs. KSCE J Civ Eng 22, 2880–2889 (2018). https://doi.org/10.1007/s12205-017-1822-0
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DOI: https://doi.org/10.1007/s12205-017-1822-0