Effects of corrosion inhibiting admixtures and supplementary cementitious materials combinations on the strength and certain durability properties of HPC

This paper reports a study carried out to evaluate the effects of corrosion inhibiting admixtures, calcium nitrite and disodium tetrapropenyl succinate, in combination with supplementary cementitious materials, fly ash and silica fume Portland cement, on the compressive strength and certain durability properties of high performance concrete. Mixture formulations, including binary and ternary combinations of these admixtures were evaluated. Chloride profiles after 91 and 365 days of exposure and the compressive strength and electrical resistivity at 1, 7, 14, 28, 180, and 365 days of age were estimated. Also, results of corrosion evaluation after five-year exposure to a natural marine environment at Treat Island Maine, USA are presented and discussed. Results indicate that the use of corrosion inhibitors in combination with supplementary cementitious materials was beneficial, albeit to various degrees, in enhancing the strength and durability properties of high performance concrete with no noticeable adverse effects.