[1]陈俊,姚成,周若愚,等.多孔沥青混合料渗水性能的方向差异性及其受孔隙结构的影响[J].东南大学学报(自然科学版),2018,48(5):920-926.[doi:10.3969/j.issn.1001-0505.2018.05.020]
 Chen Jun,Yao Cheng,Zhou Ruoyu,et al.Directional difference of water permeability of porous asphalt mixture and influence of pore structure[J].Journal of Southeast University (Natural Science Edition),2018,48(5):920-926.[doi:10.3969/j.issn.1001-0505.2018.05.020]
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多孔沥青混合料渗水性能的方向差异性及其受孔隙结构的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
48
期数:
2018年第5期
页码:
920-926
栏目:
交通运输工程
出版日期:
2018-09-20

文章信息/Info

Title:
Directional difference of water permeability of porous asphalt mixture and influence of pore structure
作者:
陈俊1姚成1周若愚1许涛2黄晓明3
1 河海大学土木与交通学院, 南京 210098; 2 南京林业大学土木工程学院, 南京 210037; 3 东南大学交通学院, 南京 210096
Author(s):
Chen Jun1 Yao Cheng1 Zhou Ruoyu1 Xu Tao2 Huang Xiaoming3
1 College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China
2 School of Civil Engineering, Nanjing Forestry Unviersity, Nanjing 210037, China
3 School of Transportation, Southeast University, Nanjing 210096, China
关键词:
多孔沥青混合料 渗水 方向差异性 连通孔隙 孔隙结构
Keywords:
porous asphalt mixture permeability directional difference interconnected pore pore structure
分类号:
U414
DOI:
10.3969/j.issn.1001-0505.2018.05.020
摘要:
为了分析多孔沥青混合料渗水性能的方向差异特征及其受连通孔隙结构的影响规律,通过自行研发的渗水仪测试了4个空隙率下OGFC-13和OGFC-10混合料试件空间24个方向上的渗水系数.结合CT扫描和图像处理方法,重构了4个空隙率下OGFC-13混合料试件的三维孔隙结构.提取连通孔隙后,分析了影响混合料渗水方向差异性的孔隙结构指标.结果表明:多孔沥青混合料渗水系数存在明显的方向差异性,竖向截面内水平方向上的渗水系数最大;水平截面也存在方向差异性,但其与方向之间的关系不明确;空隙率越大,采用集料的公称最大粒径越大,则方向差异性越小;相比水平向连通孔隙,混合料内部竖向孔隙的水力直径虽略大,但数量少且总长度短,这是影响渗水系数方向差异性的主要原因.
Abstract:
To analyze the directional difference of water permeability of porous asphalt mixture and the influence of pore structure, a self-developed permeameter was used to measure the permeability in twenty-four directions of OGFC-13 and OGFC-10 with four air void contents. The three-dimensional(3D)pore structure of OGFC-13 with four air void contents was reconstructed by using computed tomography(CT)technology and image processing. After the interconnected pores were extracted, the pore structure index which affects the water permeability directional difference of mixture was analyzed. The results show that the permeability of porous asphalt mixtures has an obvious directional difference. In the vertical plane, the maximum value of permeability occurs in the horizontal direction. In the horizontal plane, the permeability has a directional difference, but has no obvious relationship with directions. The increase of the air void content and the nominal maximum aggregate size can reduce the directional difference. Compared with the horizontal interconnected pores, vertical pores in mixtures have a larger hydraulic diameter, less quantity and length, which is the main reason for the water permeability directional difference of porous asphalt mixture.

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备注/Memo

备注/Memo:
收稿日期: 2018-03-05.
作者简介: 陈俊(1981—),男,博士,副教授,chen_jun2728@163.com.
基金项目: 国家自然科学基金资助项目(51208178)、中央高校基本科研业务费专项资金资助项目(2015B17014).
引用本文: 陈俊,姚成,周若愚,等.多孔沥青混合料渗水性能的方向差异性及其受孔隙结构的影响[J].东南大学学报(自然科学版),2018,48(5):920-926. DOI:10.3969/j.issn.1001-0505.2018.05.020.
更新日期/Last Update: 2018-09-20