Ingress of chloride ions is the prime determinant for inducing corrosion damage to marine Reinforced Concrete (RC) structures and subsequent lowered service life. Being attributable to high inherent permeability of concrete, chloride ions ingress can be hindered by appropriate selection of binder types and mix design parameters as means of safeguarding durability concerns while ensuring desired target strength and workability. Commercially available Portland Composite Cement (PCC) consists of general blends of different Supplementary Cementitious Materials (SCM) without any particular regard for durability and there is no proper guideline available to determine the ideal proportion or type of SCM for different mix design requirements. Hence, a comprehensive study is essential in inferring the ideal type and proportion of SCM for a range of common mix design parameters in marine environment. A study has, thereby, been conducted on local concrete mixes, designed for different strengths, with different proportions of fly-ash or slag as SCM for a wide range of water cement (w/c) ratios and target slump values. An overall comparison of both Corrosion Initiation Time (CIT) and compressive strength of each mix has also been evaluated. It has been evident that fly-ash, as SCM, has been significantly effective in enhancing CIT values of concrete mixes, although it affects compressive strength. A considerable effect of target slump range on CIT values has also been observed in the study. Furthermore, generalized graphs have been generated with CIT and strength values for each of the mix parameters with an aim to develop a quantitative guideline to tailor mix designs with ideal SCM selection while maintaining an optimum balance between desired strength, workability and durability concerns in marine environment.

氯离子的进入是引起船用钢筋混凝土（RC）结构腐蚀损坏并降低使用寿命的主要决定因素。可归因于混凝土的高固有渗透度，氯离子进入可通过粘合剂类型的适当选择受阻和维护耐用性问题，同时确保所需的目标强度和加工性的手段混合的设计参数。市售的波特兰复合水泥（PCC）由不同补充胶凝材料（SCM）的一般混合物组成，没有特别考虑到耐久性，也没有合适的准则来确定针对不同混合物设计要求的理想SCM比例或类型。因此，全面的研究对于推断海洋环境中一系列常见混合物设计参数的理想SCM类型和比例至关重要。因此，已经针对具有不同强度，具有不同比例的粉煤灰或矿渣作为SCM的本地混凝土混合物进行了研究，以用于各种水灰比（w / c）和目标坍落度值。还评估了每种混合物的腐蚀起始时间（CIT）和抗压强度的总体比较。显然，粉煤灰作为SCM，尽管会影响抗压强度，但在提高混凝土拌合料的CIT值方面非常有效。在研究中还观察到目标坍落度范围对CIT值有相当大的影响。此外，