Title:
Concrete, Construction, or Salt—Which Causes Scaling? Part 2
Author(s):
Dipayan Jana
Publication:
Concrete International
Volume:
26
Issue:
12
Appears on pages(s):
51-56
Keywords:
finishing; air-void systems; loss of air; excess water
DOI:
Date:
12/1/2004
Abstract:
This second part describes three case studies where, despite having good air-void systems, the concrete scaled. It is theorized that the concrete scaled due to improper finishing practices such as: a) initiation of finishing prior to the cessation of bleeding (entrapping bleed water under the finished surface); b) finishing in the presence of excess water at the surface, which reduces the scaling and abrasion resistance of the surface; and c) prolonged finishing, which severely reduces the air content at the surface and increased the concrete’s potential to scale.