Use of Waste Tire Rubber Alkali-Activated-Based Mortars in Repair of Concrete Structures

Authors: Mohammad Ebrahim Kianifar, Ehsan Ahmadi

Abstract:

Reinforced concrete structures experience local defects such as cracks over their lifetime under various environmental loadings. Consequently, they are repaired by mortars to avoid detrimental effects such as corrosion of reinforcement, which in long-term may lead to strength loss of a member or collapse of structures. However, repaired structures may need multiple repairs due to changes in load distribution, and thus, lack of compatibility between mortar and substrate concrete. On the other hand, waste tire rubber alkali-activated (WTRAA)-based materials have very high potential to be used as repair mortars because of their ductility and flexibility, which may delay failure of repair mortar, and thus, provide sufficient compatibility. Hence, this work presents a study on suitability of WTRAA-based materials as mortars for repair of concrete structures through an experimental program. To this end, WTRAA mortars with 15% aggregate replacement, alkali-activated (AA) mortars, and ordinary mortars are made to repair a number of concrete beams. The WTRAA mortars are composed of slag as base material, sodium hydroxide as alkaline activator, and different gradation of waste tire rubber (fine and coarse gradations). Flexural tests are conducted on the concrete beams repaired by the ordinary, AA, and WTRAA mortars. It is found that, despite having lower compressive strength and modulus of elasticity, the WTRAA and AA mortars increase flexural strength of the repaired beams, give compatible failures, and provide sufficient mortar-concrete interface bondings. The ordinary mortars, however, show incompatible failure modes. This study demonstrates promising application of WTRAA mortars in practical repairs of concrete structures.

Keywords: Alkali-activated mortars, concrete repair, mortar compatibility flexural strength, waste tire rubber.

References:

[1] Pang B, Jin Z, Zhang Y, Xu L, Li M, Wang C, et al. Ultraductile waterborne epoxy-concrete composite repair material: Epoxy-fiber synergistic effect on flexural and tensile performance. Cem Concr Compos 2022;129:104463. https://doi.org/10.1016/J.CEMCONCOMP.2022.104463.
[2] Ma CK, Apandi NM, Sofrie CSY, Ng JH, Lo WH, Awang AZ, et al. Repair and rehabilitation of concrete structures using confinement: A review. Constr Build Mater 2017;133:502–15 https://doi.org/10.1016/J.CONBUILDMAT.2016.12.100.
[3] Wang H, Wu Y, Qin X, Li L, Chen H, Cheng B. Behavior of cement concrete confined by fabric-reinforced geopolymer mortar under monotonic and cyclic compression. Structures 2021;34:4731–44. https://doi.org/10.1016/J.ISTRUC.2021.10.070.
[4] Kharwar KL, Maurya KK, Rawat A. Retrofitting techniques of damaged concrete structure for environment concern: A review. Mater Today Proc 2022. https://doi.org/10.1016/J.MATPR.2022.04.169.
[5] Grengg C, Müller B, Staudinger C, Mittermayr F, Breininger J, Ungerböck B, et al. High-resolution optical pH imaging of concrete exposed to chemically corrosive environments. Cem Concr Res 2019;116:231–7. https://doi.org/10.1016/j.cemconres.2018.10.027.
[6] Huang Y, Ye H, Fu C, Jin N. Modeling moisture transport at the surface layer of fatigue-damaged concrete. Constr Build Mater 2017;151:196–207. https://doi.org/10.1016/j.conbuildmat.2017.06.038.
[7] Liu Y, Wang F, Hu S, Liu M. Compatibility of repair materials with substrate low-modulus cement and asphalt mortar (CA mortar). Constr Build Mater 2016;126:304–12. https://doi.org/10.1016/J.CONBUILDMAT.2016.08.142.
[8] Markandeya A, Mapa D, Fincan M, Shanahan N, Stetsko Y, Riding K, et al. Chemical Shrinkage and Cracking Resilience of Metakaolin Concrete. ACI Mater J 2019;116:99–106. https://doi.org/10.14359/51716714.
[9] Wu L, Farzadnia N, Shi C, Zhang Z, Wang H. Autogenous shrinkage of high performance concrete: A review. Constr Build Mater 2017;149:62–75. https://doi.org/10.1016/J.CONBUILDMAT.2017.05.064.
[10] Saldanha R, Júlio E, Dias-Da-Costa D, Santos P. A modified slant shear test designed to enforce adhesive failure. Constr Build Mater 2013;41:673–80. https://doi.org/10.1016/J.CONBUILDMAT.2012.12.053.
[11] Emmons PH, Vaysburd AM, McDonald JE. Rational Approach to Durable Concrete Repairs. Concrete International 1993;15:40–5.
[12] Czarnecki L, Garbacz A, Lukowski P, Clifton J. Polymer Composites for Repairing of Portland Cement Concrete: Compatibility Project 1999.
[13] Pattnaik RR, Rangaraju PR. Investigation on Flexure Test of Composite Beam of Repair Materials and Substrate Concrete for Durable Repair. Journal of The Institution of Engineers (India): Series A 2014;95:203–9. https://doi.org/10.1007/s40030-014-0096-5.
[14] Pattnaik RR, Rangaraju PR. Analysis of Compatibility between Repair Material and Substrate Concrete Using Simple Beam with Third Point Loading. Journal of Materials in Civil Engineering 2007;19:1060–9.
[15] Pattnaik RR. Investigation on Failures of Composite Beam and Substrate Concrete due to Drying Shrinkage Property of Repair Materials. Journal of The Institution of Engineers (India): Series A 2017;98:85–93. https://doi.org/10.1007/s40030-017-0195-1.
[16] Teixeira OG, Geraldo RH, da Silva FG, Gonçalves JP, Camarini G. Mortar type influence on mechanical performance of repaired reinforced concrete beams. Constr Build Mater 2019;217:372–83. https://doi.org/10.1016/J.CONBUILDMAT.2019.05.035.
[17] Ghoddousi P, Haghtalab M, Shirzadi Javid AA. Experimental and numerical analysis of the effects of different repair mortars on the controlling factors of macro-cell corrosion in concrete patch repair. Cem Concr Compos 2021;121:104077. https://doi.org/10.1016/J.CEMCONCOMP.2021.104077.
[18] Fapohunda C, Akinbile B, Shittu A. Structure and properties of mortar and concrete with rice husk ash as partial replacement of ordinary Portland cement – A review. International Journal of Sustainable Built Environment 2017;6:675–92. https://doi.org/10.1016/J.IJSBE.2017.07.004.
[19] Zhang X, Du M, Fang H, Shi M, Zhang C, Wang F. Polymer-modified cement mortars: Their enhanced properties, applications, prospects, and challenges. Constr Build Mater 2021;299:124290. https://doi.org/10.1016/J.CONBUILDMAT.2021.124290.
[20] Yu Z, Wu L, Yuan Z, Zhang C, Bangi T. Mechanical properties, durability and application of ultra-high-performance concrete containing coarse aggregate (UHPC-CA): A review. Constr Build Mater 2022;334:127360. https://doi.org/10.1016/J.CONBUILDMAT.2022.127360.
[21] Shoji D, He Z, Zhang D, Li VC. The greening of engineered cementitious composites (ECC): A review. Constr Build Mater 2022;327:126701. https://doi.org/10.1016/J.CONBUILDMAT.2022.126701.
[22] Ameri F, Shoaei P, Zareei SA, Behforouz B. Geopolymers vs. alkali-activated materials (AAMs): A comparative study on durability, microstructure, and resistance to elevated temperatures of lightweight mortars. Constr Build Mater 2019;222:49–63. https://doi.org/10.1016/j.conbuildmat.2019.06.079.
[23] Wang YS, Peng K di, Alrefaei Y, Dai JG. The bond between geopolymer repair mortars and OPC concrete substrate: Strength and microscopic interactions. Cem Concr Compos 2021;119:103991. https://doi.org/10.1016/j.cemconcomp.2021.103991.
[24] Geraldo RH, Teixeira OG, Matos SRC, Silva FGS, Gonçalves JP, Camarini G. Study of alkali-activated mortar used as conventional repair in reinforced concrete. Constr Build Mater 2018;165:914–9. https://doi.org/10.1016/J.CONBUILDMAT.2018.01.063.
[25] Laskar SM, Talukdar S. A study on the performance of damaged RC members repaired using ultra-fine slag based geopolymer mortar. Constr Build Mater 2019;217:216–25. https://doi.org/10.1016/J.CONBUILDMAT.2019.05.033.
[26] Nounu G, Chaudhary ZUH. Reinforced concrete repairs in beams. Constr Build Mater 1999;13:195–212. https://doi.org/10.1016/S0950-0618(99)00014-8.
[27] Ahmad S, Elahi A, Barbhuiya SA, Farid Y. Use of polymer modified mortar in controlling cracks in reinforced concrete beams. Constr Build Mater 2012;27:91–6. https://doi.org/10.1016/J.CONBUILDMAT.2011.08.023.
[28] ACI 546.3R-06. Guide for the Selection of Materials for the Repair of Concrete. American Concrete Institute; 2006.
[29] BS EN 1504-3:2005. Products and Systems for the protection and repair of concrete structures. Requirements, quality control and evaluation of conformity. Structural and non-structural repair. BSI Standards Limited; 2005.
[30] Pattanaik SC, Patro SK, Das B. Polymeric Materials for Repair of Distressed Concrete Structures, 2020.
[31] Siddique R, Naik TR. Properties of concrete containing scrap-tire rubber–an overview. Waste Manag 2004;24:563–9. https://doi.org/10.1016/j.wasman.2004.01.006.
[32] Zhong H, Poon EW, Chen K, Zhang M. Engineering properties of crumb rubber alkali-activated mortar reinforced with recycled steel fibres. J Clean Prod 2019;238:117950. https://doi.org/10.1016/J.JCLEPRO.2019.117950.
[33] de Souza Kazmierczak C, Schneider SD, Aguilera O, Albert CC, Mancio M. Rendering mortars with crumb rubber: Mechanical strength, thermal and fire properties and durability behaviour. Constr Build Mater 2020;253:119002. https://doi.org/10.1016/j.conbuildmat.2020.119002.
[34] Eren N, Alzeebaree R, Cevik A, Niş A, Mohammedameen A, Gülşan E. The The Effects of Recycled Tire Rubbers and Steel Fibers on the Performance of Self-compacting Alkali Activated Concrete. Periodica Polytechnica Civil Engineering 2021;65. https://doi.org/10.3311/PPci.17601.
[35] Ameri F, Shoaei P, Reza Musaeei H, Alireza Zareei S, Cheah CB. Partial replacement of copper slag with treated crumb rubber aggregates in alkali-activated slag mortar. Constr Build Mater 2020;256:119468. https://doi.org/10.1016/J.CONBUILDMAT.2020.119468.
[36] ASTM C192-19. Standard Practice for Making and Curing Concrete Test Specimens in the Laboratory. West Conshohocken, PA: ASTM International; 2019.
[37] ASTM C293-16. Standard Test Method for Flexural Strength of Concrete (Using Simple Beam with Center-Point Loading). West Conshohocken, PA: ASTM International; 2016.
[38] ASTM C138-17. Standard Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete. West Conshohocken, PA: ASTM International; 2017.
[39] BS EN 12390-1:2021. Testing hardened concrete. Shape, dimensions and other requirements for specimens and moulds. BSI Standards Limited; 2021.
[40] Youssf O, Elchalakani DrM, Hassanli R, Roychand R, Zhuge Y, Gravina RJ, et al. Mechanical Performance and Durability of Geopolymer Lightweight Rubber Concrete. Journal of Building Engineering 2021;45:1. https://doi.org/10.1016/j.jobe.2021.103608.
[41] Komaki M, Ghodrati Dolatshamloo A, Eslami M, Heydari S. Ameliorating Precast Concrete Curbs Using Rubber and Nano Material. Civil Engineering Journal 2017;3. https://doi.org/10.28991/cej-2017-00000077.
[42] T. Noguchi, K. M. Nemati. Relationship between compressive strength and modulus of elasticity of high-strength concrete. Proceedings of the 6th International Conference on Fracture Mechanics of Concrete and Concrete Structures 3 2007:1305–11.