Use of Polymeric Energy Absorption Liners to Improve the Concrete Rock Fall Barriers

Abstract

In this study, usability of polymer foam coatings on impact surfaces of concrete rock fall barriers to increase the energy absorption capacity performances was investigated with a series of experimental studies. For this purpose, impact tests were carried out on different concrete block samples within the laboratory tests. According to the results, it was determined that the displacement values of the barrier blocks due to the impac t effect can be significantly reduced by using polymer energy absorption liners. Additionally, cracks and failures of the concrete block bodies resulting from high impact energies can be prevented by the polymer energy absorption liners. It was assessed that a polyurethane based thermoset foam coating with a density of 60 kg/m3 can economically and remarkably improve the concrete barriers against impact loads.

A Resin Type Additive Use to Improve Load Bearing Capacities of Grouted Rock Bolts Exposed to Thermal Cycles

“…In that time, the material completely solidifies and the polymerization ends. Therefore, the maximum mechanical strength is KÖMÜRLÜ 10.21923/jesd.1214531 751 reached at the end of the tack free time varying between 18 h and 24 h for most of the thermosets (Tsangouri et al, 2015;Komurlu, 2021b). The longest polymerization stage is the tack-free time.…”