Effects of Combined Supplementary Cementitious Materials on Physical Properties of Kansas Concrete Pavements.

摘要

This study evaluated the effects of combining varying proportions of slag cement and Class C fly ash with Type I/II cement in concrete pavement. Three different ternary cementitious material combinations containing slag cement and Class C fly ash (10% fly ash with 27% slag, 15% fly ash with 25% slag and 20% fly ash with 24% slag) were combined with limestone coarse aggregate and a moderately-reactive fine aggregate. Two concretes used only Portland cement. Specimens of each concrete from the project were tested in the laboratory to evaluate physical properties. On-going pavement condition surveys will track pavement performance. All three ternary-blend concretes met specification requirements for the tests of alkali-silica reactivity. The 10% fly ash-27% slag combination was the most effective in preventing expansion. The 10% fly ash-27% slag concrete also had the highest strength and lowest permeability of the five concretes tested.