Abstract

This study investigated the possibility of developing self-compacting concrete (SCC) utilising silicomanganese fume (SMF), an industrial waste material. SCC was produced by replacing cement with 10, 20, 30, 40, 50, 60, 70, 80 and 90% SMF. First, an assessment of the fresh properties of 10 SCC mixtures was carried out, and then mixtures satisfying the fresh requirements were selected for further evaluation. Plastic shrinkage and setting time of the fresh SMF-SCC mixtures were measured, and thereafter the mechanical properties and drying shrinkage were evaluated. The incorporation of SMF increased the dosage of superplasticizer required for a certain flow, but it enhanced the filling ability and passing ability of SCC. In addition, the incorporation of SMF increased the plastic and drying shrinkage, as well as initial and final setting times. Although there was an improvement in mechanical properties of SCC mixtures containing 10 and 20% SMF, increasing the quantity of SMF beyond 20% negatively affected the mechanical properties. Furthermore, the use of SMF decreased the cost of SCC by 7–42% and the CO₂ emission decreased by 10–68%.

摘要

本研究调查了利用工业废料硅锰粉 (SMF) 开发自密实混凝土 (SCC) 的可能性。SCC 是通过用 10%、20%、30%、40%、50%、60%、70%、80% 和 90% 的 SMF 代替水泥生产的。首先，对10种SCC混合物进行新鲜度性能评价，然后选择满足新鲜度要求的混合物进行进一步评价。测量新鲜 SMF-SCC 混合物的塑性收缩率和凝固时间，然后评估机械性能和干燥收缩率。SMF的掺入增加了一定流量所需减水剂的用量，但增强了SCC的填充能力和通过能力。此外，SMF 的加入增加了塑料和干燥收缩，以及初凝和终凝时间。尽管含有 10% 和 20% SMF 的 SCC 混合物的机械性能有所改善，但将 SMF 的量增加到超过 20% 会对机械性能产生负面影响。此外，SMF 的使用使 SCC 的成本降低了 7–42%，CO₂排放量减少了 10–68%。