Page 427 - Forensic Structural Engineering Handbook
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12.18 MATERIAL-SPECIFIC FORENSIC ANALYSES
FIGURE 12.14 Close-up of concrete damaged by expansive alkali-silica reaction (ASR).
Cracks (arrows) radiate from a reactive aggregate (chert). Scale is in millimeters. (Courtesy of
CTLGroup.)
FIGURE 12.15 Photomicrograph of freeze-thaw-damaged concrete in thin section showing
abundant horizontal microcracks in the near-surface region. Cracks mainly pass around aggre-
gates (A). Field width from left to right is approximately 2 mm. (Courtesy of CTLGroup.)
