Journal of Materials and Engineering Structures
Volume 12, Numéro 4, Pages 433-443
2025-12-30

Use Of Microgrid Fiber Type New Additives To Improve Load Bearing And Energy Absorption Capacities Of Shotcrete Mixes



Authors : Komurlu Eren .

Abstract

In this study, different polypropylene type polymer fiber additives were comparatively examined carrying out a series of EFNARC plate (slab) loading test, which is a popular test for evaluation of the shotcrete liner performances. A new fiber type called microgrid fiber (MGF) was compared with the conventional polypropylene fiber (PPF) additives. Shotcrete mixes were tested to determine their load bearing, deformability and energy absorption capacity properties. Additionally, indirect (splitting) tensile strength (ITS) values of specimens were determined to compare influences of different fiber types. According to the slump test findings, the workability of the fresh mixes decreased with an increase in fiber content. It was determined that the workability properties of conventional PPF and MGF added specimens were similar. However, it was found that the MGF type additive reduced the fresh mix workability more than the PPF additive due to the increase in the fiber content. It was found that MGF additive was found to supply better improvements in ITS values, load bearing and energy absorption capacity properties of slabs in comparison with the conventional PPF additive. The new MGF type additive was assessed to be usable to effectively improve the shotcrete performances.

Keywords

Shotcrete ; Fiber reinforcement ; Polyproylene fiber ; Microgrid fiber

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