This paper presents an experimental study to measure mechanical properties of bonded concrete specimens. The bond between freshly mixed and hardened concrete has been a concern in repair and retrofit projects as well as staged construction of concrete members. This concern has roots in the time-dependent behavior of concrete, beginning with early-age concrete and continuing with long-term performance and durability of concrete. Moreover, environmental conditions generally complicate the behavior of concrete and resulted deformations such as shrinkage and creep. Application of chemical adhesives and epoxies is a common technique to enhance the bond at the interface of old and new concrete elements. The presented methodology includes preparation of bonded specimens with application of grout and adhesive agents. Mechanical strengths of specimens have been reported based on compressive, tensile, flexural, and shear testing. Results indicate that bonding agents are more effective in tensile and shear behavior of bonded samples.
FIP (Fédération International de la Précontrainte) Commission on Practical Construction. Repair and strengthening of concrete structure, London: Thomas Telford, 1991.
ACI (American Concrete Institute) Committee 503. Guide for the selection of polymer adhesives with concrete, ACI 503.5R-92. Detroit, MI: American Concrete Institute, 1992.
Knab L., and C. B. Spring. “Evaluation of test methods for measuring the bond strength of Portland-cement based repair material to concrete,” Cement, Concrete and Aggregate, vol. 11, no. 1, pp. 3-14, 1989.
Rizzo, E. M., and M. B. Sobelman. “Selection criteria for concrete repair material,” Concrete International, vol. 11, no. 9, pp.46-49, 1989.
Tracy, R. G., and R. S. Fling. “Rehabilitation strategies,” Concrete International, vol. 11, no. 9, pp.41-45, 1989.
ACI (American Concrete Institute) Committee 548. Guide for the application of epoxy and latex adhesives for bonding freshly mixed and hardened concretes, ACI 548.11R-12. Farmington Hills, MI: American Concrete Institute, 2012.
Tehrani, F. M. “Performance of Steel Fiber Reinforced Concrete in Beam-Column Connections,” Ph.D. dissertation, Dept. Civil and Environmental Engineering, University of California, Los Angeles, CA, 2008.
Tehrani, F. M., and R. M. Serrano. “Crack Propagation of Concrete Ties Prestressed with Single Strand Tendons,” Journal of Civil Engineering Research, vol. 4, no. 3, pp. 71-81, 2014.
McComb, C., and F. M. Tehrani. “Enhancement of Shear Transfer in Composite Deck with Mechanical Fasteners,” Journal of Engineering Structures, vol. 88, no. 1, pp. 251-261, 2015.
Shadravan, B., and F. M. Tehrani. “A Review of Direct Shear Testing Configurations for Bond between Fiber-Reinforced Polymer Sheets on Concrete and Masonry Substrates,” Periodica Polytechnica Civil Engineering, vol. 61, no. 4, pp. 740-751, 2017.
Soto, A., and F. M. Tehrani. “Investigation of Crack Propagation in Steel-Concrete Composite Beams using Fiber Reinforcement,” Periodica Polytechnica Civil Engineering, vol. 62, no. 4, pp. 956-962, 2018.
Miller, N. M., and F. M. Tehrani. “Mechanical Properties of Rubberized Lightweight Aggregate Concrete,” Journal of Construction and Building Materials, vol. 147, no. 30, pp. 264-271, 2017.
Tehrani, F. M., and N. M. Miller. “Tire-derived Aggregate Cementitious Materials: A Review of Mechanical Properties,” in Cement-based Materials, Ed. by H. Saleh. London, UK: IntechOpen, 2018.
Tehrani, F. M., J. Carreon, and N. Miller. “An Investigation of Tire-derived Lightweight Aggregate Concrete,” in ACI Special Publication SP-334-5, Ed. by ACI Committee 555, no. 334, pp. 68-98, 2019.
Nazari, M., F. M. Tehrani, M. Ansari, B. Jeevanlal, F. Rahman, and R. Farshidpour. “Green Strategies for Design and Construction of Non-Auto Transportation Infrastructure,” Report 19-17, San Jose, CA: Mineta Transportation Institute, 2019.
Tehrani, F. M., M. Nazari, D. Truong, and R. Farshidpour. “Sustainability of Tire-Derived Aggregate Concrete: A Case Study on Energy, Emissions, Economy, and ENVISION,” Proc. International Conference on Sustainable Infrastructure 2019: Leading Resilient Communities through the 21st Century, Los Angeles, CA: ASCE, (November 6-9, 2019), pp. 399-408, 2019.
Tehrani, F. M. Rāhnamā-ye Jāme‘-e Līkā, [The Comprehensive Guide to LECA, in Persian], New Edition, Tehran, Iran: Omīdān, 2010.
Tehrani, F. M., R. Farshidpour, M. Pouramini, M. Mousavi, and A. N. Esfahani. “Sustainability Rating of Lightweight Expanded Clay Aggregates using Energy Inputs and Carbon Dioxide Emissions in Life-cycle Analysis,” The Sixth International Symposium on Life Cycle Civil Engineering, Ghent, Belgium: IALCCE, (October 2018), pp. 2989-2993, 2018.
Tehrani, F. M. 2019. Notes on Fiber-Reinforced Lightweight-Aggregate Structural Concrete and Concrete Masonry, ESCSI E-Newsletter, September 2019.
Tehrani, F. M. 2019. Deploying and Rating Sustainable Practices for Resilient Bridge Infrastructure. Keynote Lecture, Proc. The Fifth International Conference on Bridges, Tehran, Iran: Amirkabir University of Technology. (December 17-18, 2019): MS05.
Bonyadian, S., M. Mohammadi, B. Foroutanmehr, and F. M. Tehrani. “An Experimental Investigation of Internally-Cured Concrete Application for Bridge Decks,” The Fifth International Conference on Bridges, Amirkabir University of Technology, Tehran. (December 17-18, 2019), no. MS02, 2019.
Tehrani, F. M. 2020. Service Life Prediction of Structural Lightweight Concrete Using Transport Properties. ESCSI Report 4363, October 2020, Chicago, IL: Expanded Shale, Clay and Slate Institute.
Santos, P. M. D., and E. N. B. S. Júlio. “Factors affecting bond between new and old concrete,” ACI Materials Journal, vol. 108, no. 4, pp. 449-456, 2011.
Austin, S., P. Robins, and Y. Pan, “Shear Bond Testing of Concrete Repairs,” Cement and Concrete Research, vol. 29, no. 7, pp. 1067-1076, 1999.
ASTM (American Society for Testing and Materials) C39 / C39M-17b. Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens, West Conshohocken, PA: ASTM International, 2017.
ASTM (American Society for Testing and Materials) C78 / C78M-16. Standard Test Method for Flexural Strength of Concrete (Using Simple Beam with Third-Point Loading), West Conshohocken, PA: ASTM International, 2016.
ASTM (American Society for Testing and Materials) C496 / C496M-11. Standard Test Method for Splitting Tensile Strength of Cylindrical Concrete Specimens, West Conshohocken, PA: ASTM International, 2004.