EK550
The bond strength of the specimen with no duct is actually higher than that of the specimens with plastic duct. Reductions in bond strength relative to the steel duct specimen […]
EK549
The initial stiffness and strength of the specimen with galvanized steel duct are greater than those with plastic ducts. Reductions in strength relative to the steel duct specimen are 18% […]
EK548
Polypropylene and polyethylene ducts did not confine the grout after theformation of widespread splitting cracks in the concrete.