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根据跨海大桥的设计要求,提出了制备C50海工混凝土的原材料选择、配合比设计和质量控制方法,结合原材料研究了矿物掺和料对海工混凝土工作性能和力学性能的影响规律。发现掺加粉煤灰或矿渣能明显提高海工混凝土的工作性,采用双掺粉煤灰和矿渣或三元复掺粉煤灰——矿渣——硅灰技术能满足C50混凝土早期张拉要求,随矿物组分中硅灰所占比例增大,力学性能增强效果越明显。
According to the design requirements of the sea-crossing bridge, the raw material selection, mix design and quality control method for preparing C50 marine concrete are proposed. The influences of mineral admixtures on the performance and mechanical properties of marine concrete are studied. Found that adding fly ash or slag can significantly improve the workability of marine concrete, the use of double mixed fly ash and slag or ternary mixed fly ash - slag - silica fume technology to meet the requirements of early C50 concrete tensile , With the proportion of silica fume mineral components increased, the more obvious mechanical properties to enhance the effect.