The application of seawater as the mixing water in concrete production could mitigate the increasing demand for fresh water in concrete production associated with the continuously increasing offshore infrastructures. Understanding the key factors that influence the properties of seawater-mixed cementitious materials could promote the application of seawater during concrete preparation. A comprehensive investigation was carried out to assess the effects of the water/cement ratio (w/c), the partial replacement of ordinary Portland cement (OPC) with supplementary cementitious materials, and the salt concentration in seawater on the rheological properties (plastic viscosity (η), dynamic yield stress (τ_d), thixotropic area (A_thix)), compressive strength (f_c), hydration products and microstructure of cement pastes. The results show that there was an increase in η, τ_d, A_thix and f_c in all seawater mixes compared to deionized (DI) water mixes, and the increase in strength was more significant in the pastes with a lower w/c. The increase in salt concentration in the seawater did not linearly increase f_c; instead, the early age strength increased initially and then decreased. This result was due to the combined effects of the increased chloride and Na⁺ ions on the strength development with the increase in salt concentration in the seawater. Interestingly, it was found that there was a good correlation between the results of η and f_c for the seawater mixes in this study, and the same η value indicated a higher f_c in the seawater mix than in the DI water mix.

将海水用作混凝土生产中的混合水可以减轻与海洋基础设施的不断增加相关的混凝土生产中对淡水的不断增长的需求。了解影响海水混合胶凝材料性能的关键因素可以促进海水在混凝土制备过程中的应用。进行了全面的调查，以评估水灰比（w / c），用补充胶凝材料部分替代普通硅酸盐水泥（OPC）以及海水中盐分浓度对流变性能（塑性粘度）的影响。 （η），动态屈服应力（τ _d），触变面积（甲_THIX），抗压强度（f _c），水合产物和水泥浆的微观结构。结果表明，有一个增加η，τ _d，甲_THIX和˚F _Ç相比去离子（DI）水混合在所有海水混合，并在强度的增加是在糊剂更显著具有较低W / C。海水中盐分浓度的增加并没有线性增加f _c ; 取而代之的是，早期强度先增加后减小。该结果归因于氯化物和Na ⁺增加的综合作用。离子随着海水中盐浓度的增加而增强。有趣的是，在这项研究中，发现海水混合物的η和f _c结果之间具有良好的相关性，并且相同的η值表明海水混合物中的f _c比DI水混合物中的f _c高。