Investigation of Use of Slag Aggregates and Slag Cements in Concrete Pavements to Reduce the Maintenance Cost
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2017-12-01
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-Materials
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Abstract:The objective of this research was to evaluate the influence of using the ACBFS aggregate (slag aggregate) as a replacement for natural aggregates on the properties of pavement concrete designed to meet the standard specifications of the Indiana Department of Transportation. A total of eight different concrete mixtures, four containing air-cooled blast furnace slag (ACBFS) as coarse aggregate and additional four containing natural dolomite, were used in this study. These mixtures included plain concrete mixture (100% of Type I Portland cement), two mixtures with binary binder systems (one containing 20 wt.% of Class C fly ash + 80 wt.% of Type I Portland cement and the other containing 25 wt.% slag cement + 75 wt.% of Type I Portland cement) and one mixture with a ternary binder system (23% slag cement + 17% of Class C fly ash + 60% of Type I Portland cement). Specimens produced from each of these mixtures were ponded with each of the three different types of chloride based deicers (CaCl2,MgCl2 and NaCl) while being subjected to either freezing-thawing (FT) cycles or wetting-drying (WD) cycles.
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