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系统研究了掺合料掺入方式、砂胶比、纤维掺量对超高性能混凝土流动性能和力学行为的影响规律。通过二元、三元复合工业废渣,大掺量取代水泥;普通砂取代细石英砂;掺入短切钢纤维,优化基体组成,在普通成型和标准养护条件下,制备出了抗压强度200MPa的生态型超高性能混凝土(ECO-UHPC)。研究表明:配比为50%水泥、10%硅灰、10%粉煤灰、30%矿渣,胶砂比1:1.2,纤维体积掺量3%优于其它配比,抗压强度达到200MPa,抗折强度达到55MPa。本研究以期对生态型超高性能混凝土(ECO-UHPC)的实际工程应用有参考和指导作用。
The influencing rules of admixture incorporation method, mortar ratio and fiber content on the flowability and mechanical behavior of ultra-high performance concrete were systematically studied. Through the binary, ternary composite industrial waste, high volume instead of cement; ordinary sand to replace fine quartz sand; incorporation of chopped steel fibers to optimize the matrix composition, under normal molding and standard curing conditions, prepared a compressive strength of 200MPa Of eco-type high performance concrete (ECO-UHPC). The results show that the proportion of fiber is 50% cement, 10% silica fume, 10% fly ash, 30% slag, mortar ratio is 1: 1.2, fiber volume content is 3% better than the other ratio, compressive strength reaches 200MPa, Bending strength of 55MPa. This study is expected to provide reference and guidance for the practical engineering application of eco-type ultra-high performance concrete (ECO-UHPC).