Application of ferronickel slag as fine aggregate in recycled aggregate concrete and the effects on transport properties
作者： Peng Zhang , Jiuwen Bao , Jiuwen Bao , Tiejun Zhao , Zihao Yu
DOI: 10.1016/J.JCLEPRO.2021.127149
关键词: Compressive strength 、 Sorptivity 、 Aggregate (composite) 、 Absorption of water 、 Slag 、 Microstructure 、 Ferroalloy 、 Environmental pollution 、 Composite material 、 Materials science
摘要: Abstract Industrial and construction solid waste regarded as a hazardous material has given rise to the potential threats of environmental pollution. The ferronickel slag (FNS) an industrial by-product recycled concrete aggregates (RCAs) derived from demolition wastes have for sustainable use fine coarse aggregate in concrete, respectively. However, less information regarding re-utilization FNS (RAC) effects on transport properties can be found previous literature. aim this study is investigate compressive strength behavior RAC incorporating aggregate. In study, several groups specimens with different replacement ratios (0, 20%, 40% 50%) RCAs 50% 100%) were prepared. strengths FNS-RAC at curing age 3, 7 28 days measured. coupled resistance water absorption chloride penetration discussed. To explore effect microstructure behavior, tests scanning electron microscope (SEM) energy dispersive spectrometer (EDS) further conducted. Overall, sorptivity diffusion coefficient increase RCA ratio increases, but they generally decrease increasing content. mixtures containing 40%-50% exhibit greater better behavior.
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