混凝土密度是影响钢筋混凝土耐久性的重要因素之一。通常对于钢筋混凝土来说,具有高密度、低水灰比的高质量的混凝土在海洋环境中具有较强的耐久性。对于海洋环境中的北轮港码头混凝土结构部分,而是采用低密度(造成低密度的原因是由于高水灰比混凝土的离析作用,如不充分的振动而凝固)和薄厚度的保护层;那么钢筋腐蚀的发生会远早于其它构造中的相同部分;或是相同构造中的其它部分。尤其是出现在防溅区的上述情况,更会导致 Concrete density is one of the important factors that affect the durability of reinforced concrete. Usually for reinforced concrete, high-quality concrete with high density and low water-cement ratio has strong durability in the marine environment. For the part of the concrete structure of the North Rotary wharf in the marine environment, the low density (caused by the high water-cement ratio of the concrete, such as insufficient vibration to solidify) and the thin thickness of the protective layer are used; Rebar corrosion then occurs much earlier than the same part in other structures; or in other parts of the same structure. In particular, the above situation that occurs in the splash zone will result in