Fig. 10From: Synergistic Effects of Polypropylene and Glass Fiber on Mechanical Properties and Durability of Recycled Aggregate ConcreteMicrostructure of RAC before and after the coupled actions of mechanical loading and salt-solution freeze–thaw cycles: microstructure of RAC a before, b after coupled actions; interface c before and d after coupled actions; and traces of fiber pull-out e before, and f after coupled actions.Back to article page