Resistance of Geotextiles Against the Isolated and Combined Effect of Mechanical Damage Under Repeated Loading and Abrasion
The installation procedures (which may cause mechanical damage) and abrasion may provoke unwanted changes in the properties of the geosynthetics, affecting their performance. This work evaluated the resistance of two geotextiles (with different structures) against two degradation mechanisms: mechanical damage under repeated loading and abrasion. The geotextiles were (1) exposed in isolation to each degradation mechanism and (2) exposed consecutively to both degradation mechanisms. The damage suffered by the geotextiles (in the degradation tests) was evaluated by monitoring changes in their tensile and static puncture behaviour. Based on the changes occurred in tensile and puncture strength, reduction factors were determined. The reduction factors obtained in the successive exposure to mechanical damage under repeated loading and abrasion were compared with the reduction factors determined by the traditional methodology for the combined effect of those degradation mechanisms.
KeywordsGeotextiles Mechanical damage Abrasion Reduction factors
This work was financially supported by projects POCI-01-0145-FEDER-028862 and POCI-01-0145-FEDER-007457, funded by FEDER funds through COMPETE 2020 – “Programa Operacional Competitividade e Internacionalização” (POCI) and by national funds (PIDDAC) through FCT/MCTES. J.R. Carneiro would like to thank FCT for the research grant SFRH/BPD/88730/2012 (grant supported by POPH/POCH/FSE funding).
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