开级配沥青磨耗层降低路面噪声优化
U416; 为了评估开级配沥青磨耗层(OGFC)在降低路面噪声方面的性能,采用击实法制备了20种集料级配组成的OGFC混合料(OGFC-16、OGFC-13、OGFC-10和OGFC-5)马歇尔试件,利用驻波管按1/3倍频测得了不同试件的吸声频谱,并与密级配沥青混合料(AC-13)进行了对比.结果 表明:OGFC混合料的吸声频谱近似呈现出先升后降的变化规律,AC-13混合料的吸声频谱没有明显起伏变化,OGFC混合料的吸声系数要远大于AC-13;随着空隙率的增加,OGFC混合料的平均和峰值吸声系数逐渐增大,峰值频率向高频方向移动,并得到了吸声系数和降噪值随空隙率变化的数学表达式;对于空隙率相近的...
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| Published in | 东南大学学报（自然科学版） Vol. 51; no. 5; pp. 866 - 873 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
重庆交通大学土木工程学院,重庆400074
20.09.2021
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-0505 |
| DOI | 10.3969/j.issn.1001-0505.2021.05.019 |
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| Abstract | U416; 为了评估开级配沥青磨耗层(OGFC)在降低路面噪声方面的性能,采用击实法制备了20种集料级配组成的OGFC混合料(OGFC-16、OGFC-13、OGFC-10和OGFC-5)马歇尔试件,利用驻波管按1/3倍频测得了不同试件的吸声频谱,并与密级配沥青混合料(AC-13)进行了对比.结果 表明:OGFC混合料的吸声频谱近似呈现出先升后降的变化规律,AC-13混合料的吸声频谱没有明显起伏变化,OGFC混合料的吸声系数要远大于AC-13;随着空隙率的增加,OGFC混合料的平均和峰值吸声系数逐渐增大,峰值频率向高频方向移动,并得到了吸声系数和降噪值随空隙率变化的数学表达式;对于空隙率相近的OGFC混合料,平均吸声系数几乎不受级配组成的影响,峰值频率随着公称最大粒径的增加向高频方向移动;随着试件厚度的减小,同一OGFC混合料试件的峰值吸声系数略有增加,峰值吸声频率向高频方向移动,但平均吸声系数明显衰减.因此,在满足路用性能和排水性能的前提下,降噪效果可作为优化OGFC混合料的依据,其空隙率宜为20％ ～23％. |
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| AbstractList | U416; 为了评估开级配沥青磨耗层(OGFC)在降低路面噪声方面的性能,采用击实法制备了20种集料级配组成的OGFC混合料(OGFC-16、OGFC-13、OGFC-10和OGFC-5)马歇尔试件,利用驻波管按1/3倍频测得了不同试件的吸声频谱,并与密级配沥青混合料(AC-13)进行了对比.结果 表明:OGFC混合料的吸声频谱近似呈现出先升后降的变化规律,AC-13混合料的吸声频谱没有明显起伏变化,OGFC混合料的吸声系数要远大于AC-13;随着空隙率的增加,OGFC混合料的平均和峰值吸声系数逐渐增大,峰值频率向高频方向移动,并得到了吸声系数和降噪值随空隙率变化的数学表达式;对于空隙率相近的OGFC混合料,平均吸声系数几乎不受级配组成的影响,峰值频率随着公称最大粒径的增加向高频方向移动;随着试件厚度的减小,同一OGFC混合料试件的峰值吸声系数略有增加,峰值吸声频率向高频方向移动,但平均吸声系数明显衰减.因此,在满足路用性能和排水性能的前提下,降噪效果可作为优化OGFC混合料的依据,其空隙率宜为20％ ～23％. |
| Author | 李金凤 何兆益 官志桃 |
| AuthorAffiliation | 重庆交通大学土木工程学院,重庆400074 |
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| Author_FL | Li Jinfeng Guan Zhitao He Zhaoyi |
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| Keywords | 开级配沥青磨耗层;路面噪声;驻波管;吸声系数;吸声频谱 |
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| Snippet | U416; 为了评估开级配沥青磨耗层(OGFC)在降低路面噪声方面的性能,采用击实法制备了20种集料级配组成的OGFC混合料(OGFC-16、OGFC-13、OGFC-10和OGFC-5)马歇尔试件,利用驻波管... |
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