Abstract Ferronickel slag (FNS) is an industrial by-product of ferronickel alloy production at a high temperature which can be a promising potential to be used as fine aggregate to produce more sustainable concrete. In this study, the performance of concrete containing ferronickel slag sand and fly ash relating to alkali-silica reaction (ASR) and chloride contamination was investigated. ASR-induced expansion, chloride diffusion resistance, and chloride binding capacity of FNS concrete were determined through concrete prism tests (CPT), accelerated diffusion test, and bulk diffusion test. Thermogravimetric analysis (TGA) was conducted to measure the amount of Portlandite and Friedel's salt in concrete. Concrete with 50 wt% FNS sand as fine natural aggregate replacement and 25 wt% of cement replacement by fly ash showed a remarkable potential to be used not only as a low-carbon concrete with comparable mechanical properties to conventional concrete but also with a better performance against ASR and chloride contamination.

中文翻译：

---

镍铁渣细骨料粉煤灰混凝土抗碱硅反应和氯化物扩散性能

摘要 镍铁矿渣（FNS）是在高温下生产镍铁合金的工业副产品，可用作细骨料以生产更可持续的混凝土。在这项研究中，研究了与碱硅反应 (ASR) 和氯化物污染有关的含镍铁渣砂和粉煤灰的混凝土的性能。FNS 混凝土的 ASR 引起的膨胀、氯化物扩散阻力和氯化物结合能力通过混凝土棱镜试验 (CPT)、加速扩散试验和体扩散试验确定。进行热重分析 (TGA) 以测量混凝土中波特兰石和弗里德尔盐的含量。