Title: Shotcrete Placed in Multiple Layers does NOT Create Cold Joints
Author(s): Hanskat, C.S.
Publication: Concrete International
Appears on pages(s): 46-47
Keywords: vibration, surface, impact, strength
Shotcrete is typically placed in multiple layers. Unfortunately, designers and inspectors often incorrectly confuse the interfaces between those layers with cold joints experienced in cast-in-place concrete construction. The differences between shotcrete and cast-in-place concrete placements are discussed, with strong emphasis on consolidation of both materials. Interlayer bond formation is described, and surface preparation for shotcrete placement is explained.