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各种碱性氧气转炉钢渣的形态差异及相应沥青混合料的路用性能

Morphological Discrepancy of Various Basic Oxygen Furnace Steel Slags and Road Performance of Corresponding Asphalt Mixtures.

作者信息

Ye Yong, Wu Shaopeng, Li Chao, Kong Dezhi, Shu Benan

机构信息

State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.

出版信息

Materials (Basel). 2019 Jul 21;12(14):2322. doi: 10.3390/ma12142322.

DOI:10.3390/ma12142322
PMID:31330866
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6678238/
Abstract

Due to the difference of cooling and treatment processes (rolling method, hot braised method, layer pouring method), basic oxygen furnace (BOF) steel slag can be mainly classified as roller steel slag (RSS), hot braised steel slag (HBSS) and layer pouring steel slag (LPSS). Treatment difference directly results in the performance variations of different BOF steel slag and corresponding asphalt mixtures. The primary purpose of this research was to examine the effects of different cooling and treatment processes on the morphological discrepancy of different BOF steel slag. Also, the road performances of corresponding asphalt mixtures, and mechanism between steel slag performance and road performance were studied. The results show that LPSS owns the largest variability of angular index and texture index, and RSS has the most balanced morphological parameters. The structure of RSS asphalt mixture is advantageous for improving the ability of the asphalt mixture to resist the deformation and enhancing the stability of structure. Higher content of CaO and lower content of SiO make the acid-base reaction of RSS asphalt mixture most intense, which contribute to the best road performance of it.

摘要

由于冷却和处理工艺（轧制法、热焖法、分层浇筑法）的不同，碱性氧气转炉（BOF）钢渣主要可分为滚筒钢渣（RSS）、热焖钢渣（HBSS）和分层浇筑钢渣（LPSS）。处理工艺的差异直接导致不同的碱性氧气转炉钢渣及相应沥青混合料的性能变化。本研究的主要目的是研究不同冷却和处理工艺对不同碱性氧气转炉钢渣形态差异的影响。此外，还研究了相应沥青混合料的路用性能以及钢渣性能与路用性能之间的作用机理。结果表明，分层浇筑钢渣的角形指数和纹理指数变化最大，滚筒钢渣的形态参数最均衡。滚筒钢渣沥青混合料的结构有利于提高沥青混合料的抗变形能力并增强结构稳定性。氧化钙含量较高而二氧化硅含量较低使得滚筒钢渣沥青混合料的酸碱反应最为剧烈，这使其路用性能最佳。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9019/6678238/e008421f2bcf/materials-12-02322-g014.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9019/6678238/e008421f2bcf/materials-12-02322-g014.jpg

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