High-percentage replacement of cement with fly ash for reinforced concrete pipe
Fly ash is commonly used as a substitute for cement within concrete in various applications. Manufacturers of reinforced concrete products commonly limit the quantity of fly ash used to 25% or less by weight. Test cylinders with varying percentages of Class C (25-65%) and Class F (25-75%) fly ash and a water-reducing admixture (WRA) were created under field manufacturing conditions and tested for 7-day compressive strength. Seven-day compressive strength for the concrete/fly ash/WRA was found to be highest when the concrete mix included approximately 35% Class C or 25% Class F fly ash. However, substitution ratios of up to 65% Class C or 40% Class F fly ash for cement met or exceeded American Society for Testing and Materials (ASTM) strength requirements for manufacture of Class I, II and III reinforced concrete pipe (RCP). © 2004 Elsevier Ltd. All rights reserved.
Publication Source (Journal or Book title)
Cement and Concrete Research
Berryman, C., Zhu, J., Jensen, W., & Tadros, M. (2005). High-percentage replacement of cement with fly ash for reinforced concrete pipe. Cement and Concrete Research, 35 (6), 1088-1091. https://doi.org/10.1016/j.cemconres.2004.06.040