Abstract
AbstractThe performance of strain hardening cement-based composite (SHCC) under various exposure conditions such as chloride-induced accelerated corrosion, capillary water absorption (CWA), electrical resistivity (ER), and freezing-thawing (CDF) tests is reported. SHCC was compared with two reference mortars; one is the same strength class as the SHCC (M1), and the other is a high strength class (M2). Both cracked and uncracked beam specimens were tested. Results from the investigation show that, in SHCC, the corrosion potential is a function of crack width. It is suggested that the half-cell corrosion potential measurement technique may not truly reflect the corrosion state of an embedded steel bar in SHCC. The result of the CDF test reveals that after 42 cycles of freeze-thaw attacks, SHCC performed better than M1 and M2.
Highlights
Durability of reinforced concrete (RC) structures is one of the most discussed issues among researchers worldwide (Aziz, Aleem, Heikal, & Didamony, 2005)
strain hardening cement-based composite (SHCC) performance was observed under various exposure conditions such as chloride-induced accelerated corrosion, capillary water absorption (CWA), electrical resistivity (ER), capillary suction of de-icing solution and freeze-thaw (CDF) tests
A doubling in the total and maximum crack widths lead to a 22 and 34% increase, respectively, in the corrosion potential reading in SHCC specimens tested
Summary
Durability of reinforced concrete (RC) structures is one of the most discussed issues among researchers worldwide (Aziz, Aleem, Heikal, & Didamony, 2005). This study has investigated the performance of SHCC samples in relation to two types of mortar samples under various exposure conditions such as chloride-induced accelerated corrosion, capillary water absorption, electrical resistivity, capillary suction of de-icing solution and freeze-thaw tests. The corrosion of steel bars in concrete is related to the water absorption and electrical resistivity (ER).
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