Fig. 14From: Synergetic Influence of Microcrystalline Quartz and Alkali Content in Aggregate on Deterioration of Concrete Railroad Ties Used for 15 Years in High-Speed RailwaysRepresentative microstructures for a Brand-new, b Non-cracked, c Longitudinal-cracked, and d Map-cracked taken in the BSE mode; the symbols indicate the locations of EDS measurement.Back to article page