Bond characteristics of CFRP strengthened concrete members bonded using Modified Engineered Cementitious Composite
Source abstract
Abstract
This study focuses on the development of an insulating cementitious adhesive for bonding Carbon Fibre Reinforced Polymer (CFRP) fabrics to a concrete surface. The epoxy adhesive which is the generally used adhesive for CFRP shows a low thermal performance. As a potential solution, Engineered Cementitious Composite (ECC) mortar was modified as a cementitious adhesive with improved thermal insulation. The ECC adhesive was developed using locally available class F fly ash, silica sand and Polyethylene terephthalate (PET) fibres other than the generally used cement and water (PET-ECC). The selected mix proportion for PET-ECC achieved a low thermal conductivity of 0.145–0.180 W/mK which limited the heat transfer through the adhesive layer. The effective bond length of the developed PET-ECC adhesive was 125 mm and the corresponding bond strength was 224.9 MPa. The respective bond strength was further enhanced up to 570.28 MPa by sticking river sand on top of CFRP fabric using epoxy adhesive before bonding it to the concrete surface using the PET-ECC adhesive. The use of PET-ECC as the bonding agent to strengthen compression members with CFRP confinement yielded an average strength enhancement of 34%.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Structural Behavior of Reinforced Concrete · Innovative concrete reinforcement materials · Smart Materials for Construction
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (32)
Show source-provided references
1. Bond characteristics of CFRP-strengthened concrete members subjected to cyclic temperature and mechanical stress at low humidity10.1016/j.compstruct.2016.10.131 ↗
2. C. Widanage, J.C.P.H. Gamage, Finite Element Modelling of Reinforced Concrete Horizontally Curved Beams strengthened for shear using Carbon Fiber Reinforced Polymer, in: 7th International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development, Galle, 2019: pp. 288–295.
3. Bond characteristics of CFRP plated concrete members under elevated temperatures10.1016/j.compstruct.2006.04.068 ↗
4. Performance in fire of small-scale CFRP strengthened concrete beams10.1061/(ASCE)1090-0268(2006)10:6(503) ↗
5. Carbon fiber cement matrix ( CFCM) overlay system for Masonry Strengthening10.1061/(ASCE)1090-0268(1998)2:2(105) ↗
6. Mineral-based bonding of carbon FRP to strengthen concrete structures10.1061/(ASCE)1090-0268(2007)11:2(120) ↗
7. Development of sustainable mortar using waste rice husk ash from rice mill plant: Physical and thermal properties
8. Green composite plaster with modified morphology for enhanced thermal comfort in buildings
9. Lightweight geopolymer-based mortars for the structural and energy retrofit of buildings10.1016/j.enbuild.2020.110352 ↗
10. Thermal and seismic capacity improvements for masonry building heritage: a unified retrofitting system10.3390/su13031111 ↗
11. Cementitious composites reinforced with continuous carbon fibres for strengthening of concrete structures10.1016/S0958-9465(02)00054-9 ↗
12. Interface characterization of different types of fibers in engineered cementitious composites (ECC)10.9790/1684-1401020814 ↗
13. Significance of various fibres on engineered cementitious concretint
14. Flexural performance of CFRP textile-retrofitted RC beams using cement-based adhesives at high temperature10.1016/j.conbuildmat.2011.09.015 ↗
15. CFRP-ECC hybrid for strengthening of the concrete structures10.1016/j.compstruct.2017.07.034 ↗
16. Durability of mechanically loaded engineered cementitious composites under highly alkaline environments10.1016/j.cemconcomp.2007.09.004 ↗
17. Use of high volumes of fly ash to improve ECC mechanical properties and material greenness
18. Mechanical and thermal properties of green lightweight engineered cementitious composites10.1016/j.conbuildmat.2013.07.104 ↗
19. Modification of engineered cementitious composite mortar to use as an adhesive for CFRP/concrete bond
20. J.C.P.H. Gamage, M.B. Wong, R. Al-Mahadi, Performance of CFRP strengthened concrete members under elevated temperatures, Proceeding of the International Sysposium on Bond Behaviour of FRP in Structures (BBFS 2005), 2005, 113–118.
21. Bond behaviour between NSM CFRP strips and concrete at high temperature using innovative high-strength self-compacting cementitious adhesive ( IHSSC-CA) made with graphene oxide10.1016/j.conbuildmat.2016.10.066 ↗
22. Engineered cementitious composites (ECC) – material, structural, and durability performance
23. Effect of elevated temperature on strain-hardening engineered cementitious composites10.1016/j.conbuildmat.2014.07.052 ↗
24. Mechanical performance of ECC with high-volume fly ash after sub-elevated temperatures10.1016/j.conbuildmat.2015.09.002 ↗
25. Discontinuous micro-fibers as intrinsic reinforcement for ductile Engineered Cementitious Composites (ECC)10.1016/j.compositesb.2020.107741 ↗
26. Strength improvement of strain-hardening cementitious composites with ultrahigh-volume fly ash10.1061/(ASCE)MT.1943-5533.0001987 ↗
27. X-Calibur Structural Systems, X-Wrap C300 Technical Data Sheet, 2020. https://www.x-calibur.us/files/X-Wrap C300.pdf.
28. American Society for Testing and Materials, ASTM C 109/C 109M - Standard Test Method for Compressive Strength of Hydraulic Cement Mortars, ASTM International, 2009, 29–31. https://doi.org/10.1201/9781420091175-c5.10.1201/9781420091175-c5 ↗
29. American Society for Testing and Materials, ASTM C190–85 - Method of Test for Tensile Strength of Hydraulic Cement Mortars, ASTM International, 1985.
30. European Committee for Standardization, EN 1015–11 - Methods of test for mortar for masonry, European Standard. 3, 2006.
31. Flexural strengthening of RC beams with CFRP grid-reinforced ECC matrix10.1016/j.compstruct.2018.01.048 ↗
32. American Society for Testing and Materials, ASTM D8337 / D8337M - 21 - Standard Test Method for Evaluation of Bond Properties of FRP Composite Applied to Concrete Substrate using Single-Lap Shear Test, ASTM International, 2021. https://doi.org/10.1520/D8337_D8337M-21.10.1520/D8337_D8337M-21 ↗