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| Mechanical Performance Improvement by Stabilizing Hot-braised Steel Slag-Gravel Mixed Aggregates |
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Received:February 29, 2024
Revised:March 09, 2024
Accepted:March 13, 2024
Published Online:August 08, 2024
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| DOI：doi：10.3969/j.issn.1007-7545.2024.09.017 |
| KeyWord:stabilized layer; heat treatment; aluminium dross; Hot-braised Steel Slag; intermixed aggregates |
| Author | Institution |
| QING Sancheng |
矿冶科技集团有限公司 |
| WANG Xin |
矿冶科技集团有限公司 |
| LI Wengang |
昆明理工大学设计研究院有限公司 |
| MA Liping |
昆明理工大学环境科学与工程学院 |
| WANG Yongguang |
矿冶科技集团有限公司 |
| XUE Guanghai |
矿冶科技集团有限公司 |
| PAN Shewei |
矿冶科技集团有限公司 |
| WU Meng |
矿冶科技集团有限公司 |
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| Abstract: |
| Highly developed scale roadbed construction can consume bulk industrial solid waste. In this study, composite hydraulic stabilized layer materials were prepared by using bulk industrial solid waste such as phosphogypsum(PG), hot-braised steel slag(HBSS), aluminium dross(AD), portland cement(PC), and natural aggregates(NA). The PG and AD were modified by heat treatment with environmental hazards removed. The modified PG-HBSS-AD-PC composite cement was then used to stablize the optimised HBSS-NA intermixed aggregates. The results showed that replacing NA with fine-grained HBSS could optimise the aggregate architecture of the hydraulic stabilisation layer by increasing the density. The incorporation of 160 ℃-treated PG and 900 ℃-treated AD into PC further enhanced the strength of the hydraulic stabilisation layer through the hardening CaSO4?0.5H2O, generation of hydrated calcium aluminate(C-A-H), and ettringite(AFt), with a high solid waste utilisation rate. |
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