钢渣OGFC-13型排水沥青混合料的配合比设计及性能研究 |
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引用本文: | 向晓东,周溪滢,李灿华,华洲连,焦立新.钢渣OGFC-13型排水沥青混合料的配合比设计及性能研究[J].武汉冶金科技大学学报,2013(6):424-427. |
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作者姓名: | 向晓东 周溪滢 李灿华 华洲连 焦立新 |
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作者单位: | [1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]武汉钢铁集团金属资源有限责任公司,湖北武汉430083 |
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基金项目: | 武汉市高新技术成果转化及产业化项目(2013010803010378) |
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摘 要: | 以钢渣为粗集料、石灰岩为细集料、矿粉为填料、SBS改性沥青为结合料配制OGFC-13型开级配钢渣排水沥青混合料,其配合比为m((13.2~19)mm钢渣)∶m((9.5~13.2)mm钢渣)∶m((4.75~9.5)mm钢渣)∶m((0~4.75)mm石灰岩)∶m(矿粉)=13∶28∶45∶13∶1,最佳油石比为4.5%,聚脂纤维用量为0.3%。该沥青混合料的钢渣用量高达86%,且不用提高改性沥青和纤维用量,有利于钢渣的综合利用,节约道路建设成本。通过马歇尔稳定度、冻融劈裂强度和车辙试验得出,该沥青混合料的马歇尔稳定度为9.8kN,劈裂强度比为89.8%,动稳定度为5753次/mm,均优于技术规范要求。该沥青混合料的渗水系数为37.0mL/s,摩擦系数(BPN值)为70.7,表明其渗水能力很强,抗滑性能优良。
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关 键 词: | 沥青混合料 钢渣 开级配磨耗层 排水沥青路面 配合比 |
Design and performance of OGFC-13 steel slag asphalt mixture |
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Authors: | Xiang Xiaodong Zhou Xiying Li Canhua Hua Zhoulianz Jiao Lixin |
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Affiliation: | 2 (1. College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China 2. Metal Resources Co. , Ltd. , Wuhan Iron and Steel Corporation, Wuhan 430083, China) |
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Abstract: | OGFC-13 open-graded steel slag porous asphalt mixture was produced from the SBS modified asphalt, with steel slag as coarse aggregate, limestone as fine aggregate, and mineral powder as pad- ding. The mix proportion was (19-13.2)mm steel slag: (13.2-9.5)mm steel slag : (9.5-4.75) mm steel slag : (4.75-0)mm limestone : mineral powder=13 % : 28%: 45% : 13% : 1%. The op- timal asphalt content (OAC) was 4.5%, and the consumption of polyester fiber was 0.3%. Steel slag consumed reached 86% with no increase in needed asphalt and polyester fiber, which reduced the cost. It is found that the Marshall stability of OGFC-13 reaches 9. 8 kN, the freeze-thraw split strength ratio 89.8% and the dynamic stability 5753 times/mm, which are all superior to those stipulated in China's relevant regulations. The water permeability coefficient of OGFC-13 is 37.0 mL/s and the friction coefficient 70.7, which means that OGFC-13 has a strong water seepage and anti-slid- ing performance . |
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Keywords: | asphalt mixture steel slag open-graded friction course (OGFC) porous asphalt pave-ment mix proportion |
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