Internally Sealed Concrete:Wax Beads.

摘要

This report covers the placement,heating,and testing of two test sites: a salt shed floor,and a bridge deck span. Wax beads were mixed with fresh concrete and used as a 1.5in. (38mm) overlay on the salt house floor slab. In the construction of the bridge span,wax beads were used throughout the full 9.5in. (240mm) depth of the deck,to avoid two stage pouring. Three methods of melting the wax are discussed. They include:infrared heating,forced air heating,and electric blanket heating. While melting the wax the maximum allowable surface temperature is 350 F (177C). A minimum temperature of 185 F (85C) is required at the reinforcing steel level to melt the wax. Various tests were run on the slabs. Discussed in this report are: (1) absorption, (2) penetration, (3) chloride analysis, (4) skid resistance, (5) crack survey, (6) compressive strengths,and (7) half-cell. A special provision for internally wax sealed concrete bridge floors,as developed by the Oklahoma Department of Transportation (ODOT),is included.