Durability of concrete made with manganese slag as supplementary cementitious materials

This paper discusses mineral composition and pore microstructure characteristics of water-cooled manganese slag and its effects on durability of concrete. The Mn slag has an alveolate pore structure, and the ground Mn slag is characterized by multiangular shape which consists of α′-C₂S, C₃MS₂, CaO·MnO·2SiO₂ and C₂AS. Experimental results show that the Mn slag has potential hydraulic reactivity. Concrete made with Mn slag as supplementary cementitious materials (SCMs) exhibits very low strength loss and weight loss in the synthetic seawater corrosion and freezing-thawing cycle tests. The research provides useful reference for knowing about Mn slag and for applying Mn slag to improve the durability of concrete.     

如东海域某风电场设计风速和波浪研究

风、浪是影响海上风电场风电支撑结构安全的重要因素,为了确定如东某海域海上风电场设计波浪,采用WRF大气模式模拟热带风暴过程并联合CCMP风场数据集作为驱动风场,利用SWAN模型对如东风电场海域近20 a的波浪过程进行了模拟,获得了不同重现期风速和波浪要素.结果表明,WRF模拟热带风暴结果和CCMP风场联合可以获得更为准...