Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ecological low-shrinkage full-ferrochrome slag aggregate ultra-high performance concrete and preparation method thereof
According to the ecological low-shrinkage full-ferrochrome slag aggregate ultra-high performance concrete and the preparation method thereof, a large amount of solid waste ferrochrome slag discharged during ferrochrome alloy smelting serves as aggregate to completely replace quartz sand or natural river sand, and mining of natural gravel aggregate and damage and pollution caused by the natural gravel aggregate to the ecological environment can be reduced. A fly ash-silica fume-ferrochrome slag micro powder ternary system is used as an auxiliary cementing material to further optimize particle accumulation, and the provided ultra-high performance concrete has ultrahigh mechanical and anti-drying shrinkage performance; the problem that the total ferrochrome slag aggregate ultra-high performance concrete is large in self-constriction can be remarkably improved by regulating the pre-wetting water absorption rate of the aggregate to be 45%-65%. The full-ferrochrome slag aggregate ultra-high performance concrete has a compact matrix and interface structure, can better fix and seal chromium in ferrochrome slag, and has lower chromium leaching concentration compared with common concrete.
本发明公开了一种生态型低收缩全铬铁渣骨料超高性能混凝土及其制备方法，以冶炼铬铁合金排放的大宗固废铬铁渣作为骨料完全替代石英砂或天然河砂，有利于减少天然砂石骨料的开采及其对生态环境造成的破坏和污染。以粉煤灰‑硅灰‑铬铁渣微粉三元体系作为辅助胶凝材料以进一步优化颗粒堆积，所提供的超高性能混凝土具有超高的力学及抗干燥收缩性能，通过调控骨料预湿吸水率在45％‑65％之间可显著改善全铬铁渣骨料超高性能混凝土自收缩较大的问题。所述全铬铁渣骨料超高性能混凝土具有密实的基体和界面结构，可对铬铁渣中的铬较好地固封，对比普通混凝土具有更低的铬浸出浓度。
Ecological low-shrinkage full-ferrochrome slag aggregate ultra-high performance concrete and preparation method thereof
According to the ecological low-shrinkage full-ferrochrome slag aggregate ultra-high performance concrete and the preparation method thereof, a large amount of solid waste ferrochrome slag discharged during ferrochrome alloy smelting serves as aggregate to completely replace quartz sand or natural river sand, and mining of natural gravel aggregate and damage and pollution caused by the natural gravel aggregate to the ecological environment can be reduced. A fly ash-silica fume-ferrochrome slag micro powder ternary system is used as an auxiliary cementing material to further optimize particle accumulation, and the provided ultra-high performance concrete has ultrahigh mechanical and anti-drying shrinkage performance; the problem that the total ferrochrome slag aggregate ultra-high performance concrete is large in self-constriction can be remarkably improved by regulating the pre-wetting water absorption rate of the aggregate to be 45%-65%. The full-ferrochrome slag aggregate ultra-high performance concrete has a compact matrix and interface structure, can better fix and seal chromium in ferrochrome slag, and has lower chromium leaching concentration compared with common concrete.
本发明公开了一种生态型低收缩全铬铁渣骨料超高性能混凝土及其制备方法，以冶炼铬铁合金排放的大宗固废铬铁渣作为骨料完全替代石英砂或天然河砂，有利于减少天然砂石骨料的开采及其对生态环境造成的破坏和污染。以粉煤灰‑硅灰‑铬铁渣微粉三元体系作为辅助胶凝材料以进一步优化颗粒堆积，所提供的超高性能混凝土具有超高的力学及抗干燥收缩性能，通过调控骨料预湿吸水率在45％‑65％之间可显著改善全铬铁渣骨料超高性能混凝土自收缩较大的问题。所述全铬铁渣骨料超高性能混凝土具有密实的基体和界面结构，可对铬铁渣中的铬较好地固封，对比普通混凝土具有更低的铬浸出浓度。
Ecological low-shrinkage full-ferrochrome slag aggregate ultra-high performance concrete and preparation method thereof
生态型低收缩全铬铁渣骨料超高性能混凝土及其制备方法
RONG ZHIDAN (Autor:in) / ZHU YUANYUAN (Autor:in) / SONG ZHAOXI (Autor:in)
19.01.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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