Effect of One-Part Alkaline Activated Cement Treatment on Bond Strength between Steel Bars and Concrete

Abstract

This research aims to study the bond strength between steel bars and concrete using one-part alkaline-activated cement (ACCP) paste as coating material to compare with commercial coating material. A combination of modified geopolymer powder (MGP), Portland cement, NaOH pellets, and tap water was used to produce AACP. The MGP was used to replace PC at the rates of 0, 15, 20, 25, and 30 by weight of binder. For specimen preparation, the ACCP coated steel bars for 1 day. After 28 days, the bond strength between steel bars and concrete was tested. Test results found that Bond strength tended to decrease as the proportion of MGP in PC increased. However, the bond strength of ACCP having not exceed 20% MGP was comparable to those of 100PC and epoxy.