Bending properties and damage evolution of fiber-reinforced aeolian sand backfill materials

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Oct. 10, 2024

Backfilling is a promising measure for controlling surface subsidence in mined-out areas and disposing solid wastes from the mineral processing, there are increasing demands of enhanced toughness anti-cracking properties backfill materials to prolong service life under complex loads. In this study, polypropylene (PP) fibers were employed improve performance backfills, four-point bending uniaxial compression tests conducted investigate failure process damage evolution fiber-reinforced aeolian-sand (FABs) using Digital Image Correlation (DIC) Acoustic Emission (AE) techniques. The results show that compressive strength tends decrease with fiber volume fractions, while shows tendency increase initially then decrease, optimum fraction PP 0.6%. At optimal fraction, lengths 3 mm 9 resulted 65.25% 81.62% FABs, respectively. As indicated by DIC measurements, length more effective horizontal vertical displacements FABs loads than mm, cracks developed slowly at same deflection. addition, have stronger crack extension delay characteristics due longer anchorage distance, as evidenced frequent acoustic emission ringing counts higher cumulative counts. study may provide theoretical basis application backfilling.

Language: Английский

Superior reinforcement efficiency of basalt fibers in geopolymers: Hydration interaction and embodied carbon advantage over carbon fibers

Sustainable materials and technologies, Journal Year: 2024, Volume and Issue: 43, P. e01203 - e01203

Published: Dec. 12, 2024

Language: Английский