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Post-fire mechanical properties of concrete made with recycled tire rubber as fine aggregate replacement.
Muhammad Arf Muhammad , Wrya Abdulfaraj Abdullah faraj , Prof. Dr.Mohamed Raouf Abdul-Kadir

University of Sulaimani, College of Engineering, Civil Engineering Department

Received : 08/05/2017, Accepted : 06/09/2017
DOI Link:

     In this study, effects of high blazing temperature with varied time durations on mechanical behavior of normal concrete containing recycled tire rubber as a fine aggregate (RTRFA) have been presented. RTRFA is used as a partial replacement of natural fine aggregate to make rubberized concrete. Generally, concrete used in structural members must satisfy fire resistance requirements in building codes. Therefore, this paper aims at studying the performance of the rubberized concrete prior and after its exposure to fire in accordance with ISO 834 curve for firing. It has been stipulated that the presence of tire rubber particles is mostly for the consideration of environment safeguard. In this investigation, five different concrete mixes were prepared with Ordinary Portland Cement, natural fine and coarse aggregate, with fine aggregate replacement ratios (0%, 6%, 12%, 18% and 24%) by weight. From these mixes, 60 cylindrical specimens (100mm diameter × 200mm high) and 60 cubic specimens (150mm×150mm×150mm) were prepared. These concrete specimens were divided into four groups, consisting of 15 cubes and 15 cylinders each. The first group  (so called “control”) were tested without exposing it to fire and the remaining three groups were separately subjected to fire for three different time periods vis. (20, 40 and 60 minutes) in a furnace fabricated according to ASTM E119. Then the concrete specimens were tested to observe the post-fire mechanical properties including split tensile strength, compressive strength and ultrasonic pulse velocity. The results of time-temperature curves, slump, fresh density, hardened density, percent-mass loss, compressive strength, split tensile strength of all the mixes are presented. The results showed that both the compressive strength and split tensile strength of concrete mixes decreased with higher percentage replacement of fine aggregate by RTRFA before and after exposure to fire. Moreover, longer time of fire duration or higher replacement ratios leads to further strength reduction of compressive and split tensile strengths. Additionally, it was found that the usage of ultrasonic pulse velocity for concrete samples containing more than 6% of RTRFA as a replacement of sand gives unreasonable measurements. Finally, statistical equations were derived to predict these properties of concrete with RTRFA replacements.

KEYWORDS:  Fire, Rubberized concrete, Post-fire Mechanical properties, Recycled Tire Rubber Fine Aggregate (RTRFA)

1- World Business Council for Sustainable Development, WBCSD (2010) End-of-Life Tires: A Framework for Effective Management Systems.
2- Pacheco-Torgal F, Ding Y, Jalali S. Properties and durability of concrete containing polymeric wastes (tyre rubber and polyethylene terephthalate bottles): an overview. Constr Build Mater 2012;30:488–94.
3- Kodur, V. “Properties of Concrete at Elevated Temperatures,” ISRN Civil Engineering, vol. 2014, Article ID 468510, 15 pages, 2014. doi:10.1155/2014/468510
4- ACI 216.1, “Code requirements for determining fire resistance of concrete and masonry construction assemblies,” ACI 216.1- 07/TMS-0216-07, American Concrete Institute, Farmington Hills, Mich, USA, 2007.
5- ACI-318, Building Code Requirements For ReinForced Concrete and Commentary, American Concrete Institute,, Farmington Hills, Mich, USA, 2014.
6- [6] EN 1991-1-2: actions on structures. Part 1-2: general actions - actions on structures exposed to fire, Eurocode 1, European Committee for Standardization, Brussels, Belgium, 2002.
7- EN, 1992-1-2: design of concrete structures. Part 1-2: general rules—structural fire design, Eurocode 2, European Commit-tee for Standardization, Brussels, Belgium, 2004.
8- Correia, J.R., Marques, A.M., Pereira, C.M.C., de Brito, J., 2012. Fire reaction properties of concrete made with recycled rubber aggregate. Fire Mater. 36 (2), 139–152.
9- Bravo, M., de Brito, J., 2012. Concrete made with used tyre aggregate: Durability related Performance. Journal of Cleaner Production, doi: 10.1016/j.jclepro.2011.11.0662011.
10- Marques, A.M. Correia, J.R., Brito, J. de 2013. Post-fire residual mechanical properties of concrete made with recycled rubber aggregate Fire Safety Journal 58 (2013) 49–57
11- ISO 834—Fire resistance tests, elements of building construction, International Standards Organization, Geneve, (1975).
12- Liu, F. , Li, Guo, L.-J. Y.-C. Xie, W.-F. and Deng, J. “Fire performance of high-strength concrete reinforced with recycled rubber particles,” Mag. Concr. Res., vol. 63, no. 3, pp. 187–195, 2011.
13- BS EN 197-1 Cement. Composition, specifications and conformity criteria for common cements, CEN, Brussels, 2011
14- BS EN 12620, Aggregates for concrete, CEN, Brussels, 2002.
15- ASTM C127, Standard Test Method for Density, Relative Density (Specific Gravity), and Absorption of Coarse Aggregate, 1998.
16- ASTM C128, Test Method for Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate, 1998.
17- BS EN 812:2 Testing aggregates. Methods for determination of density, 1995
18- BS EN 12390-2 Testing hardened concrete. Making and curing specimens for strength tests, 2009.
19- Eurocode 1: Actions on Structures: Part 1.2 General Actions : Actions on Structures Exposed to Fire, 2002.
20- BS EN 12504-4 Testing concrete. Determination of ultrasonic pulse velocity, 2004.
21- BS EN 12390-3 Testing hardened concrete. Compressive strength of test specimens, 2009.
22- [22] BS EN 12390-2 Testing hardened concrete. Making and curing specimens for strength tests, 2009.
23- Rashad, A.M. (2016) A comprehensive overview about recycling rubber as fine aggregate replacement in traditional cementitious materials, International Journal of Sustainable Built Environment (2016) 5, 46–82