Influence of ZnO-doping on the properties of high-ferrite cement clinker
Influence of ZnO-doping on the properties of high-ferrite cement clinker
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ZnO掺杂对高铁素体水泥熟料性能的影响
DOI：
10.1016/j.conbuildmat.2019.07.075
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发表时间：
2019-11
影响因子：
7.4
通讯作者：
Huang Xiao
中科院分区：
文献类型：
--
作者：
Zhang Kechang;Wang Fazhou;Rao Meijuan;Zhang Wenqin;Huang Xiao
响应可持续发展战略，水泥制造业成为处理城市生活垃圾的有效途径。锌是一种重金属元素，工业废弃物可能会引入水泥窑，导致性能下降。高铁水泥（HFC）作为一种抗硫酸盐波特兰水泥，引起了人们的广泛关注。与波特兰水泥的矿物组成不同，HFC具有低C3 S和高C4 AF的特点，这可能是由于固溶体C4 AF含量的增加而具有更好的固化能力。本研究试图探讨掺杂ZnO对HFC性能的影响。结果表明，当ZnO掺杂量达到1.5wt%时，水泥的28 d抗压强度从57.1MPa提高到70.3MPa，水化反应性随着ZnO掺杂量的增加而提高。其原因是随着熟料矿物组成的变化，对C_3S的阻滞作用减弱，对C_4AF的促进作用增强。除此之外，促销在这两个因素之间起着关键作用。机理分析表明，ZnO掺杂促进了C4 AF中Fe由[FeO 4]向[FeO 6]的转化，增加了有效电荷，从而提高了C4 AF的水化反应活性。实验结果与前人的研究结果不同，证明HFC是一种良好的Zn固化/稳定化材料。
Responding to the strategy of sustainable development, Cement manufacturing industry become an effective method to dispose municipal solid waste (MSW). Zinc is a heavy metal element that might be introduced by industrial wastes to the cement kilns, resulting in a performance degradation. High-Ferrite Cement (HFC), as a kind of sulphate-resistant Portland cement has attracted extensive interesting. Different from the mineral composition of Portland cement, HFC have a low C3S and high C4AF, which may be have a better solidification capacity due to the content increase of solid solution C4AF. This study attempt to explore the influence of doping ZnO on the performance of HFC. The results indicated that the compressive strength of 28 days increased from 57.1 to 70.3 MPa when the content of doping ZnO reached 1.5 wt% and hydration reactivity increased with the increase of ZnO content. The reason could be ascribed to the decrease of retardation effect on C3S and increase of promotion effect on C4AF with the change of miner composition of cement clinker. Beyond that, promotion plays a pivotal role between the two factors. The mechanism analysis indicated that ZnO doping promoted the transformation of Fe in the C4AF from [FeO4] to [FeO6] and increased the effective charge, resulting in a higher hydration reactivity. The result obtained varied from that reported in previous researches, and proved out that HFC can be a good material to Zn solidification/stabilization.
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影响因子：
11.4
作者：
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通讯作者：
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影响因子：
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作者：
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影响因子：
7.4
作者：
Xu, Jinxia;Jiang, Linhua;Jiang, Yu
通讯作者：
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