Preparation of water-quenched manganese slag and fly ash ultrafine mineral admixture and its application in UHPC
نویسندگان
چکیده
Abstract In this paper, S95 grade ultrafine mineral admixture (UMA) was prepared by water quenched manganese slag and fly ash 1:1 compound mechanical ball milling to a specific surface area of 714 m2/kg. Its activity index 86.8% at 7d 96.3% 28d. The UMA has the characteristics small particle size, high activity. Mixing with powders different sizes, such as cement silica fume (SF), is helpful improve gradation, reduce its pore structure increase compacting property for ultra-high performance concrete (UHPC) whose raw materials are fine aggregate. UHPC using obtained based on orthogonal test. effects factors workability, properties, hydration heat microstructure were studied. results show that when SF content 10%, binder–sand ratio 1.1, water–binder 0.17, fluidity slurry can reach 261 mm, compressive strength 28d age 128 MPa 154.6 MPa, respectively. release cementitious in 3d 139.8 J/g. terms solid waste resource utilization, water-quench replace 10% preparation UHPC. It not only solve utilization problem added value quench but also cost certain extent.
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ژورنال
عنوان ژورنال: International Journal of Low-carbon Technologies
سال: 2023
ISSN: ['1748-1325', '1748-1317']
DOI: https://doi.org/10.1093/ijlct/ctac143