| 热阻式SMA-13沥青混合料级配优化 |
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| 引用本文： | 刘海鹏,蒋应军,薛金顺,方剑,陈浙江,李寿伟.热阻式SMA-13沥青混合料级配优化[J].交通运输工程学报,2018,18(6):10-17. |
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| 作者姓名： | 刘海鹏 蒋应军 薛金顺 方剑 陈浙江 李寿伟 |
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| 作者单位： | 1.长安大学 特殊地区公路工程教育部重点实验室, 陕西 西安 7100642.金华市交通质监站, 浙江 金华 3210003.金华市公路管理局, 浙江 金华 321000 |
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| 基金项目： | 国家自然科学基金项目51408044浙江省交通运输厅科技计划项目2014H60 |
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| 摘 要： | 为了研究热阻式SMA-13沥青混合料中耐火碎石最佳掺量, 设计了SMA-13沥青混合料配合比方案, 即在2.36~4.75 mm集料中, 耐火碎石体积掺量为100%, 在4.75~9.5 mm集料中, 耐火碎石体积掺量分别为20%、40%、60%、80%、100%, 在9.5~13.2 mm集料中, 耐火碎石体积掺量分别为10%、20%、30%;研究了耐火碎石掺量对SMA-13沥青混合料路用性能和阻热性能的影响规律, 提出了耐火碎石最佳掺量, 并分析了最佳掺量下热阻式SMA-13沥青混合料路用性能和阻热性能。试验结果表明: 与普通SMA-13沥青混合料相比, 将2.36~4.75 mm集料全部替换为耐火碎石时, 热阻式SMA-13沥青混合料路用性能降低约3%, 试件温度降低约1.4℃; 4.75~9.5 mm耐火碎石掺量占该粒径普通集料60%时, 热阻式SMA-13沥青混合料路用性能降低5%~10%, 试件温度降低约5.7℃, 阻热效果明显, 耐火碎石掺量超过60%时, 热阻式SMA-13沥青混合料路用性能急剧衰减, 阻热效果不明显, 掺量为60%~80%时, 热阻式SMA-13沥青混合料路用性能降低幅度达到10%~20%, 而试件温度降低幅度不超过0.7℃; 9.5~13.2 mm耐火碎石掺量占该粒径普通集料10%~20%时, 热阻式SMA-13沥青混合料路用性能基本不变, 而阻热效果明显, 掺量达到20%时, 路用性能降低约13%, 试件温度降低约7℃, 耐火碎石掺量超过20%时, 路用性能急剧下降, 无阻热效果, 试件温度增加0.1℃; 基于热阻式SMA-13沥青混合料降温效果最佳原则, 建议2.36~4.75、4.75~9.5与9.5~13.2 mm耐火碎石掺量分别占同粒径普通集料的100%、60%和20%。
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| 关 键 词： | 路面工程 SMA-13沥青混合料 耐火碎石 最佳掺量 路用性能 阻热性能 |
| 收稿时间： | 2018-08-23 |
Gradation optimization of thermal resistant SMA-13 asphalt mixture |
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| LIU Hai-peng,JIANG Ying-jun,XUE Jin-shun,FANG Jian,CHEN Zhe-jiang,LI Shou-wei.Gradation optimization of thermal resistant SMA-13 asphalt mixture[J].Journal of Traffic and Transportation Engineering,2018,18(6):10-17. |
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| Authors: | LIU Hai-peng JIANG Ying-jun XUE Jin-shun FANG Jian CHEN Zhe-jiang LI Shou-wei |
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| Affiliation: | 1.Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China2.Quality Supervision Station of Jinhua Communications, Jinhua 321000, Zhejiang, China3.Highway Administration Bureau of Jinhua, Jinhua 321000, Zhejiang, China |
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| Abstract: | In order to study the optimal dosage of refractory gravel in the thermal resistant SMA-13 asphalt mixture, the mixture proportion schemes were designed.In the schemes, the volume content of refractory gravel in the 2.36-4.75 mm ordinary aggregate was 100%, the volume content in the 4.75-9.5 mm ordinary aggregate was 20%, 40%, 60%, 80%, and 100%, respectively, and the volume content in the 9.5-13.2 mm ordinary aggregate was 10%, 20%, and 30%, respectively.The influence laws of refractory gravel content on the road property and heat resistant property of the SMA-13 asphalt mixture were studied, the optimum content ofrefractory gravel was put forward, and the road performance and thermal resistant performance of the SMA-13 asphalt mixture with this content were analyzed.Research result shows that compared with the ordinary SMA-13 asphalt mixture, when the 2.36-4.75 mm aggregate is entirely replaced by the refractory gravel, the road performance of the thermal resistant SMA-13 asphalt mixture reduces by about 3%, and the temperature of specimen decreases by about 1.4 ℃.When the 4.75-9.5 mm refractory gravel accounts for 60% of the same particle size of ordinary aggregates, the road performance of the thermal resistant SMA-13 asphalt mixture reduces by5%-10%, the temperature of the specimen decreases by about 5.7 ℃, and the heat resistance effect is obvious.When the content of the 4.75-9.5 mm refractory gravel is more than 60%, the road performance of the thermal resistant SMA-13 asphalt mixture decays rapidly, and the heat resistance effect is not obvious.When the content of the 4.75-9.5 mm refractory gravel is 60%-80%, the road performance of the thermal resistant SMA-13 asphalt mixture reduces by 10%-20%, and the temperature of the specimen decreases by less than 0.7 ℃.When the 9.5-13.2 mm refractory gravel accounts for 10%-20%of the same particle size of ordinary aggregates, the road performance of the thermal resistant SMA-13 asphalt mixture does not change basically, but the heat resistance effect is obvious.When the content reaches 20%, the road performance decreases by around 13%, and the temperature of the specimen decreases by about 7 ℃.When the content exceeds 20%, the road performance decreases sharply, the temperature of the specimen increases only by 0.1℃, and there is not heat resistance effect.Based on the best principle of cooling effect of the thermal resistant SMA-13 asphalt mixture, it is suggested that the contents of 2.36-4.75, 4.75-9.5and 9.5-13.2 mm refractory gravels account for 100%, 60%, and 20% of the same particle size of ordinary aggregates, respectively. |
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