This paper presents an experimental investigation conducted in order to evaluate the bond strength behaviour of reinforced self-compacted concrete elements under corrosion conditions. Reinforced block and beam samples were formulated using deformed steel bars with dimensions of Ø12.5 mm and Ø25 mm. The hardened concrete samples were either cured in tap water or exposed to salt solution with concentrations similar to those available in the soil and groundwater at the southern parts of Iraq. A suitable epoxy was used for coating part of the formulated samples. The preliminary mechanical properties and the rate of corrosion were firstly measured, the pullout and flexural bond-slip tests were then carried out. A comparison was also made with the relevant code of practice.

The results obtained showed that both of compressive strength and density features exhibited notable increase at early ages when the samples are exposed to salt solution. The adverse effect of such curing condition appeared at the later ages when the corrosion rate became more intensive. The highest decrease in the value of pullout strength was observed for the reinforced concrete block samples containing epoxy coating reaching to 44.5% less than those cured in tap water. Identical behaviour was also noted for the flexural bond-slip aspect. An appreciable improvement was suggested for the expression of bond strength proposed by the CEB-FIP (CEB-FIP, 2010).

本文提出了一项实验研究，目的是评估钢筋自密实混凝土构件在腐蚀条件下的粘结强度行为。使用尺寸为Ø12.5mm和Ø25mm的变形钢筋配制钢筋块和梁样品。硬化的混凝土样品在自来水中固化或暴露于盐溶液中，其浓度与伊拉克南部土壤和地下水中的浓度相似。使用合适的环氧树脂来涂覆部分配制样品。首先测量了初步的机械性能和腐蚀速率，然后进行了拉拔和弯曲粘结滑移试验。还与相关的业务守则进行了比较。

所得结果表明，当样品暴露于盐溶液中时，抗压强度和密度特征在早期时都表现出显着的增加。当腐蚀速率变得更强时，这种固化条件的不利影响出现在较晚的年龄。对于含环氧涂层的钢筋混凝土砌块样品，其抗拉强度值下降幅度最大，比在自来水中固化的样品少44.5％。弯曲粘结滑移方面也注意到了相同的行为。建议对CEB-FIP提出的粘结强度表达进行明显改善（CEB-FIP，2010年）。