Model for Deicer Scaling Resistance of Field Concretes Containing High-Range Water Reducers

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Title: Model for Deicer Scaling Resistance of Field Concretes Containing High-Range Water Reducers

Author(s): D. Whiting and J. Schmitt

Publication: Special Publication

Volume: 119

Issue:

Appears on pages(s): 343-360

Keywords: admixtures; air entrainment; concretes; deicers; scaling; voids; freeze-thaw durability; models; water-cement ratio; water-reducing agents; Materials Research

Date: 9/1/1989

Abstract:
Highway structures ranging in age from 4 to 12 years and constructed from concretes incorporating high-range water reducers were surveyed for extent of surface scaling. Core samples were obtained from selected areas. Samples were subjected to petrographic analysis and linear traverse measurements. Air-void systems were characterized using standard ASTM C 457 parameters, chord distribution analysis, "Philleo" factors, and modal chord lengths. Statistical models relating degree of surface scaling to various combinations of parameters were tested. A three-parameter linear model incorporating spacing factor, water-to-cement ratio, and alteration of air voids in near-surface regions was found to yield the highest level of correlation with observed scaling.