A Comparative Study on the Mechanical Properties of Normal and Rubberized Green Concrete

Tewodros Mamo Heylemelecot^1, , Ibrahim Kedir² and Elmer De Castro Agon²

¹Civil Engineering Department, Debretabor University, Debretabor, Ethiopia

²Civil Engineering Department, Jimma University, Jimma, Ethiopia

Cite this paper:
Tewodros Mamo Heylemelecot, Ibrahim Kedir and Elmer De Castro Agon. A Comparative Study on the Mechanical Properties of Normal and Rubberized Green Concrete. American Journal of Civil Engineering and Architecture. 2020; 8(4):154-164. doi: 10.12691/ajcea-8-4-4

Abstract

The concrete industry is one of the main consumers of natural resources. On the other hand, one of today’s major environmental problems is non-decaying waste tires left in the environment. This study utilizes the waste tires in C-25 concrete grade and investigates its behavior with rebar. An experimental study was carried out on the basic mechanical properties of concrete. A modified concrete was prepared by replacing sand in concrete with rubber aggregate by varying the replacement proportion from 4% to 16% with an increment of 4% by volume. After having the mechanical property, an effective finite element model was developed in ANSYS workbench. The stress-strain diagram from the experiment was described by command and used as input data in ANSYS simulation to analyze and determine the impact of resistance and deformation of rubberized concrete. From the experiment, it was found that the optimal rubber improves the strain capacity and its stress-strain curve shows more nonlinear behavior than normal concrete (NC). From all percentages, 8% crumb rubber concrete (CRC8) shows best relative performance it improves impact resistance, energy absorption and ductility of concrete by decreasing the weight of the structure. At failure, crumb rubber concrete (CRC) exhibited more ductility with large ultimate deflection and more uniform crack distribution. The bond behavior of CRC8 with the deformed bar is only slightly lower than NC. ANSYS output result shows that the structural behavior like maximum stress is comparable except the reduction in compressive strength. The results of FEA positively verified that rubberized concrete could absorb more impact energy before failure.

Keywords:
crumb rubber rubberized concrete structural behavior

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References:

[1]	S. D. Jamdar and U. S. Ansari, “Experimental Study of Rubberized concrete Abstract:,” vol. 4, no. 1, pp. 166-169, 2018.
[2]	S. Dey and M. Pandey, “Waste Management By Utilization Of Tire Rubber Aggregate In Concrete,” pp. 3203-3206, 2017.
[3]	H. Zhou and A. L. Brooks, “Thermal and mechanical properties of lightweight concrete containing lightweight aggregates ,” Constr. Build. Mater., vol. 198, pp. 512-526, 2019.
[4]	D. Floros and O. A. Ingason, “Modelling and simulation of reinforced concrete beams Coupled analysis of imperfectly bonded reinforcement in fracturing concrete,” 2013.
[5]	Y. Yusuf, “Fine Aggregate Production And Its Environmental Impact In Some Selected Sites Of The Rift Valley Area In Ethiopia” no. November, 2014.
[6]	A. Sofi, “Effect of waste tyre rubber on mechanical and durability properties of concrete - A review,” Ain Shams Eng. J., pp. 1-10, 2017.
[7]	P. Asutkar, S. B. Shinde, and R. Patel, “Engineering Science and Technology, an International Journal Study on the behaviour of rubber aggregates concrete beams using analytical approach,” Eng. Sci. Technol. an Int. J., vol. 20, no. 1, pp. 151-159, 2017.
[8]	“Slip of steel bars in concrete joints under extensive experimental” vol. 114, no. 9, pp. 2017-2035, 2017.
[9]	X. Shu and B. Huang, “Recycling of waste tire rubber in asphalt and portland cement concrete: An overview,” Constr. Build. Mater., vol. 67, pp. 217-224, 2014.
[10]	M. J. Al-shannag and A. Charif, “Journal of King Saud University - Engineering Sciences Bond behavior of steel bars embedded in concretes made with natural lightweight aggregates” J. King Saud Univ. - Eng. Sci., vol. 29, no. 4, pp. 365-372, 2017.
[11]	I. O. P. C. Series and M. Science, “Experimental Investigation on Damping Property of Coarse Aggregate Replaced Rubber Concrete Experimental Investigation on Damping Property of Coarse Aggregate Replaced Rubber Concrete,” 2018.
[12]	H. Lin, Y. Zhao, J. Ozbolt, P. Feng, C. Jiang, and R. Eligehausen, “Analytical model for the bond stress-slip relationship of deformed bars in normal strength concrete,” Constr. Build. Mater., vol. 198, pp. 570-586, 2019.
[13]	A. Tareq, B. H. A. Bakar, and H. Akil, “The Effect Of Combination Between Crumb Rubber And Steel Fiber On Impact Energy Of Concrete Beams,” Procedia Eng., vol. 125, pp. 825-831, 2015.
[14]	D. Tjitradi, E. Eliatun, and S. Taufik, “3D ANSYS Numerical Modeling of Reinforced Concrete Beam Behavior under Different Collapsed Mechanisms,” Int. J. Mech. Appl., vol. 7, no. 1, pp. 14-23, 2017.