随着全球海洋资源开发进程加快和海洋强国战略的深度推进,现代化海洋基础设施体系构建已成为国家战略能力提升的关键支撑,紧随其后的是大量沿海港口和土木工程项目需要建设。传统混凝土的制备消耗大量河砂,淡水资源,矿石,也违背了可持...随着全球海洋资源开发进程加快和海洋强国战略的深度推进,现代化海洋基础设施体系构建已成为国家战略能力提升的关键支撑,紧随其后的是大量沿海港口和土木工程项目需要建设。传统混凝土的制备消耗大量河砂,淡水资源,矿石,也违背了可持续发展的理念,建议采用海水、海砂替代淡水和河砂,并以矿物掺合料部分替代水泥制备混凝土,能够有效缓解建筑行业对自然资源的过度依赖,还能显著降低对环境的影响。海水海砂混凝土的研究是一项兼具经济效益与环保价值的重要课题,聚焦于海水海砂混凝土耐久性,系统总结了国内外学者对海水、海砂应用的研究成果,深入分析了海水海砂特点、盐类侵蚀、炭化、冻融以及矿物掺合料的添加对混凝土耐久性的影响在微观层面做出研究解释,发现一定掺量矿物掺合料、纤维、特殊骨料对海水海砂混凝土耐久性提升有一定帮助,同时对未来研究方向提出建议。With the acceleration of global marine resource exploitation and the in-depth advancement of maritime power strategies, the construction of modern marine infrastructure systems has become a critical support for enhancing national strategic capabilities, followed by the requirement to build a substantial number of coastal ports and civil engineering projects. The preparation of traditional concrete was accompanied by the consumption of large amounts of river sand, freshwater resources, and minerals, and contradicted the concept of sustainable development. The use of seawater and sea sand as substitutes for freshwater and river sand, combined with the partial replacement of cement with mineral admixtures in concrete preparation, can effectively alleviate the construction industry’s excessive dependence on natural resources and can significantly reduce environmental impacts. The research on seawater sea-sand concrete constitutes an important subject with both economic benefits and environmental value, focusing on the durability of seawater sea-sand concrete. Studies by domestic and international scholars on the application of seawater and sea sand were systematically summarized. An in-depth analysis was conducted on the characteristics of seawater and sea sand, salt erosion, carbonation, freeze-thaw cycles, and the effects of mineral admixture addition on concrete durability, with microscale research interpretations provided. It was found that the incorporation of appropriate amounts of mineral admixtures, fibers, and special aggregates provided certain enhancements to the durability of seawater sea-sand concrete, while recommendations were also proposed for future research directions.展开更多
文摘随着全球海洋资源开发进程加快和海洋强国战略的深度推进,现代化海洋基础设施体系构建已成为国家战略能力提升的关键支撑,紧随其后的是大量沿海港口和土木工程项目需要建设。传统混凝土的制备消耗大量河砂,淡水资源,矿石,也违背了可持续发展的理念,建议采用海水、海砂替代淡水和河砂,并以矿物掺合料部分替代水泥制备混凝土,能够有效缓解建筑行业对自然资源的过度依赖,还能显著降低对环境的影响。海水海砂混凝土的研究是一项兼具经济效益与环保价值的重要课题,聚焦于海水海砂混凝土耐久性,系统总结了国内外学者对海水、海砂应用的研究成果,深入分析了海水海砂特点、盐类侵蚀、炭化、冻融以及矿物掺合料的添加对混凝土耐久性的影响在微观层面做出研究解释,发现一定掺量矿物掺合料、纤维、特殊骨料对海水海砂混凝土耐久性提升有一定帮助,同时对未来研究方向提出建议。With the acceleration of global marine resource exploitation and the in-depth advancement of maritime power strategies, the construction of modern marine infrastructure systems has become a critical support for enhancing national strategic capabilities, followed by the requirement to build a substantial number of coastal ports and civil engineering projects. The preparation of traditional concrete was accompanied by the consumption of large amounts of river sand, freshwater resources, and minerals, and contradicted the concept of sustainable development. The use of seawater and sea sand as substitutes for freshwater and river sand, combined with the partial replacement of cement with mineral admixtures in concrete preparation, can effectively alleviate the construction industry’s excessive dependence on natural resources and can significantly reduce environmental impacts. The research on seawater sea-sand concrete constitutes an important subject with both economic benefits and environmental value, focusing on the durability of seawater sea-sand concrete. Studies by domestic and international scholars on the application of seawater and sea sand were systematically summarized. An in-depth analysis was conducted on the characteristics of seawater and sea sand, salt erosion, carbonation, freeze-thaw cycles, and the effects of mineral admixture addition on concrete durability, with microscale research interpretations provided. It was found that the incorporation of appropriate amounts of mineral admixtures, fibers, and special aggregates provided certain enhancements to the durability of seawater sea-sand concrete, while recommendations were also proposed for future research directions.
