Reinforcement-dependent long-term deflection response of baked clay beams

Document Type : Article

Authors

Department of Civil Engineering, Quaid-e-Awam University of Engineering, Science and Technology, Nawabshah, Sindh, Pakistan

Abstract

Reinforced Baked Clay (RBC) might serve as low cost material of building construction to substitute Reinforced Cement concrete (RCC). Deflection of a beam under a sustained load is considered an important parameter. It is not yet reported in literature what is the effect of reinforcement on long-term deflection response of RBC beams and relative comparison to that of RCC beams. For this purpose, RBC beams were manufactured, baked, and post-reinforced in tension zone only with three ratios of reinforcement (i.e., 0.003, 0.006, and 0.009). All the beams were subjected to a sustained load of 50 kN for one year. The results indicate that long-term deflection of RBC beams was reduced to 20%, and 50% when the reinforcement ratio was increased to 2 and 3 times of the initial reinforcement ratio of 0.003, respectively. The ultimate load carrying capacity of the RBC beams was similar to that of RCC beams. The deflection of RBC beams was thrice of the deflection of RCC beams. This paper shows that RBC beams could be utilized instead of RCC ones with no sacrifice on strength.

Keywords

Main Subjects

References

References:
1. Ghaus, A. and Pasha, H. A. "Magnitude of the housing shortage in Pakistan", Pak Dev Rev, 29, pp. 137-153 (1990).
2. Kiani, M.F. and Siyal, H.B. "Dimensions of urban growth in Pakistan", Pak Dev Rev, 30, pp. 681-691 (1991).
3. Faiella, G., The Technology of Mesopotamia, The Rosen Publishing Group, Inc., New York (2006).
4. Bertman, S., Handbook to Life in Ancient Mesopotamia, Oxford University Press (2003).
5. Arnold, D., Gardiner, S.H., Strudwick, H., and Strudwick, N., The Encyclopedia of Ancient Egyptian Architecture, Princeton University Press (2003).
6. Pearson, D., The New Natural House Book: Creating a Healthy, Harmonious, and Ecologically Sound Home, Simon and Schuster (1998).
7. McIntosh, J., The Ancient Indus Valley: New Perspectives, ABC-CLIO (2008).
8. Ansari, A.A. and Memon, M. "Performance of postreinforced baked clay panel of beams", Proceedings of the 3rd CUTSE International Conference Miri, Sarawak, Malaysia, pp. 334-342 (2011).
9. Ansari, A.A. "Suitability of pre-perforated postreinforced baked clay beam panels for low cost housing", Am. J. Civ. Eng., 1(1), pp. 6-15 (2013).
10. Lakho, N.A. and Zardari, M.A. "Relation between compressive strength of baked clay cubes and cylinders", Engineering, 8(8), pp. 509-514 (2016).
11. Lakho, N.A. and Zardari, M.A. "Effect of reinforcement on deflection and cracks in baked clay beams", Engineering, 8(10), pp. 684-690 (2016).
12. Lakho, N.A. and Zardari, M.A. "Suitability of large sized compacted baked clay blocks as a walling material", Engineering, 8(10), pp. 669-675 (2016).
13. Lakho, N.A. and Zardari, M.A. "Experimental study of  flexural behaviour of reinforced baked clay beams under impact loading", Engineering, 8(6), pp. 347-352 (2016).
14. Lakho, N.A. and Zardari, M.A. "Comparison of compressive and tensile strength of baked clay with those of normal concrete", Engineering, 8(6), pp. 301-307 (2016).
15. Lakho, N.A. and Zardari, M.A. "Long-term  flexural behaviour of reinforced baked clay beams", Sci. Iran, 24(3), pp. 877-883 (2017).
16. Ansari, A.A. "Experimental study of the behavior of pre-perforated post-reinforced baked clay panels of beams", PhD Thesis, Department of Civil Engineering, QUEST, Nawabshah, Pakistan (2008).
17. Lakho, N.A., Zardari, M.A., Memon, M., and Saand, A. "Design and fabrication of a mechanized system for casting and compacting laboratory-size clay beams", Sci Iran, 22(6), pp. 2046-2051 (2015).
18. ASTM C42/C42M-16 "Standard test method for obtaining and testing drilled cores and sawed beams of concrete", ASTM International, West Conshohocken, PA (2016).
19. ASTM C293/C293M-10. "Standard test method for flexural strength of concrete (using simple beam with center-point loading)", ASTM International, West Conshohocken, PA (2010).
20. ACI 318-14, Building Code Requirements for Structural Concrete, American Concrete Institute (2014).
21. Neville, A.M., Properties of Concrete, Pearson (2012).
22. ACI 435R-95 "Control of deflection in concrete structures", ACI Committee Report (1995).
Scientia Iranica
Volume 26, Issue 5
Transactions on Civil Engineering (A)
September and October 2019
Pages 2723-2730

Files

Share

How to cite

Statistics