PMID- 38068176
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20231209
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 16
IP  - 23
DP  - 2023 Nov 29
TI  - Investigation on Three-Dimensional Void Mesostructures and Geometries in Porous 
      Asphalt Mixture Based on Computed Tomography (CT) Images and Avizo.
LID - 10.3390/ma16237426 [doi]
LID - 7426
AB  - To investigate the void mesostructure in porous asphalt mixtures (PA), computed 
      tomography (CT) and Avizo were utilized to scan and reconstruct the 
      three-dimensional (3D) void model of PA-16 specimens. The void mesostructure of 
      the specimen was quantitatively characterized through the anisotropy evaluation 
      index. The equivalent pore network model (PNM) was extracted using the medial 
      axis method. Based on the PNM model, the topological structure of the specimen 
      and the morphological characteristics of the connected pores were analyzed. The 
      results showed that the void anisotropy evaluation method can reflect the 
      microscopic morphology of voids in porous asphalt mixtures. The cross-sectional 
      porosity of representative elementary volume (REV) is mainly distributed between 
      20% and 25%, and about 90% of the macropores have a diameter between 0.5 mm and 3 
      mm. The distribution of cross-sectional porosity is uneven along the REV height 
      direction. As the smallest cross-section of the seepage path, the equivalent 
      radius of the throat is mainly between 0.1 mm and 1.5 mm, which is much smaller 
      than the equivalent radius of the pore. The topological structure of pores is 
      quite different, and their coordination numbers are mainly concentrated within 
      18. The pores with coordination numbers 1 to 10 constitute the main body of the 
      pores inside REV, accounting for over 98% of the total number of pores. In 
      addition, the permeability calculation results show that there is a significant 
      difference in the permeability of each axis of REV compared to the total 
      permeability of the superpave gyratory compactor (SGC) specimen, which 
      illustrates that the permeability distribution presents an obvious spatial 
      anisotropy. This study effectively reveals the heterogeneity of the 3D void 
      morphology of porous asphalt mixtures, and it provides a reference for a better 
      understanding of the void flow rules in drainage pavements.
FAU - Jing, Hualong
AU  - Jing H
AUID- ORCID: 0000-0001-6328-968X
AD  - School of Civil Engineering, Central South University, Changsha 410075, China.
FAU - Dan, Hancheng
AU  - Dan H
AUID- ORCID: 0000-0002-2817-3005
AD  - School of Civil Engineering, Central South University, Changsha 410075, China.
FAU - Shan, Hongyu
AU  - Shan H
AD  - School of Civil Engineering, Central South University, Changsha 410075, China.
AD  - Power China Guiyang Engineering Corporation Limited, Guiyang 550081, China.
FAU - Liu, Xu
AU  - Liu X
AD  - School of Civil Engineering, Central South University, Changsha 410075, China.
LA  - eng
GR  - 52278468/National Natural Science Foundation of China/
GR  - U22A20235/National Natural Science Foundation of China/
GR  - 2019-122-006/Guizhou Transportation Science and Technology Foundation/
PT  - Journal Article
DEP - 20231129
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC10707229
OTO - NOTNLM
OT  - 3D reconstruction
OT  - Avizo
OT  - CT technology
OT  - anisotropy
OT  - pore network model
OT  - porous asphalt mixture
COIS- Dr. Hongyu Shan was employed by Power China Guiyang Engineering Corporation 
      Limited. The remaining authors declare that the research was conducted in the 
      absence of any commercial or financial relationships that could be construed as a 
      potential conflict of interest.
EDAT- 2023/12/09 10:43
MHDA- 2023/12/09 10:44
PMCR- 2023/11/29
CRDT- 2023/12/09 01:09
PHST- 2023/10/20 00:00 [received]
PHST- 2023/11/19 00:00 [revised]
PHST- 2023/11/25 00:00 [accepted]
PHST- 2023/12/09 10:44 [medline]
PHST- 2023/12/09 10:43 [pubmed]
PHST- 2023/12/09 01:09 [entrez]
PHST- 2023/11/29 00:00 [pmc-release]
AID - ma16237426 [pii]
AID - materials-16-07426 [pii]
AID - 10.3390/ma16237426 [doi]
PST - epublish
SO  - Materials (Basel). 2023 Nov 29;16(23):7426. doi: 10.3390/ma16237426.