To investigate the substitution of silica fume (SF) with the coupling of glass powder (GP) and steel fiber (STF), a concrete sleeper admixture (CSA) contains SF is considered as the reference concrete admixture. The use of high SF content in CSAs has negative effects on concrete rheology. Furthermore, it decreases the extensive use of ultra-high performance concrete (UHPC) in concrete markets that can mainly be caused by the limitation in available resources and the high cost of SF production. The substitution of SF with GP is insufficient; therefore, the possibility of using the coupling of GP and STF as a SF replacement has been researched. In this regard, 0.5%, 1 % and 1.5% steel fiber by concrete volume and 5%, 10% and 15% glass powder and silica fume by weight of cement content have been investigated. It is found that concrete admixture with the coupling of STF and SF improves all the characteristics of the concrete. Additionally, the coupling effects of GP and STF are better than that of the SF and STF. Based on the synthetic consideration of the performance and cost, the combination of 10% GP and 1.5% STF is optimal in case of CSA mechanical performance.

为了研究用玻璃粉（GP）和钢纤维（STF）耦合来替代硅粉（SF），将含有SF的混凝土枕木外加剂（CSA）视为参考混凝土外加剂。在CSA中使用高SF含量会对混凝土流变性产生负面影响。此外，它减少了超高性能混凝土（UHPC）在混凝土市场中的广泛使用，这主要是由于可用资源的限制和SF生产的高成本所致。用GP代替SF不够；因此，已经研究了将GP和STF耦合用作SF替代物的可能性。在这方面，已经研究了水泥体积的0.5％，1％和1.5％的钢纤维以及水泥含量的5％，10％和15％的玻璃粉和硅粉。发现掺入STF和SF的混凝土掺合料可改善混凝土的所有特性。此外，GP和STF的耦合效果比SF和STF更好。基于性能和成本的综合考虑，在CSA机械性能的情况下，最佳组合是10％GP和1.5％STF。