Bond between textile-reinforced mortar (TRM) and concrete substrates: Experimental investigation
By Saad M. Raoof, L. Koutas, D. Bournas. 2016
165 citations recorded by the source corpus.
This paper presents an extended experimental study on the bond behaviour between textile-reinforced mortar (TRM) and concrete substrates. The parameters examined include: (a) the bond length (from 50 mm to 450 mm); (b) the number of TRM layers (from one to four); (c) the concrete surface preparation (grinding versus sandblasting); (d) the concrete compressive strength (15 MPa or 30 MPa); (e) the textile coating; and (f) the anchorage through wrapping with TRM jackets. For this purpose, a total of 80 specimens were fabricated and tested under double-lap direct shear. It is mainly concluded that: (a) after a certain bond length (between 200 mm and 300 mm for any number of layers) the bond strength marginally increases; (b) by increasing the number of layers the bond capacity increases in a non-proportional way, whereas the failure mode is altered; (c) concrete sandblasting is equivalent to grinding in terms of bond capacity and failure mode; (d) concrete compressive strength has a marginal effect on the bond capacity; (e) the use of coated textiles alters the failure mode and significantly increases the bond strength; and (f) anchorage of TRM through wrapping with TRM jackets substantially increases the ultimate load capacity.
Subfields: Civil and Structural Engineering, Earth-Surface Processes, Rehabilitation
View Paper: https://www.semanticscholar.org/paper/43b9b3c4261e61a31eda2c6641c0983113e261bd
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In Civil and Structural Engineering
In Earth-Surface Processes
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Citations in the corpus
- TRM vs FRP jacketing in shear strengthening of concrete members subjected to high temperatures (2016, background): “Local damage of the jacket is observed in case of poor mechanical interlock which is affected from the textile geometry [26], the number of layers [8,23] and themortar strength.”
- Bond between TRM versus FRP composites and concrete at high temperatures (2017, methodology): “This length was selected on the basis a previous study of the authors [28], where it was found that the effective bond length (for 3e4 strengthening carbon layers) was approximately equal to 200 mm and 150 mm for the TRM and FRP systems, respectively, as illustrated in Fig.”
- Textile-reinforced mortar (TRM) versus fibre-reinforced polymers (FRP) in flexural strengthening of RC beams (2017, methodology): “…in flexural cracks. theoretical formula suggested by fib [45]; (a) TRM-strengthened beams; (b) FRP- Table 5 also compares the effective stress in the TRM composite (reff,exp) with the debonding stress obtained through direct shearbond tests (ff, bond) in the study of Raoof et al. 2016 [12].”