Gradient-based phase segmentation method for characterization of hydrating cement paste microstructures obtained from X-ray micro-CT

被引:13
作者
Kim, Ji-Su [1 ,2 ]
Suh, Jeewoo [1 ]
Pae, Junil [3 ]
Moon, Juhyuk [3 ]
Han, Tong-Seok [1 ]
机构
[1] Yonsei Univ, Dept Civil & Environm Engn, Seoul 03722, South Korea
[2] Tech Univ Berlin, Dept Civil Engn, D-13355 Berlin, Germany
[3] Seoul Natl Univ, Dept Civil & Environm Engn, Seoul 08826, South Korea
来源
JOURNAL OF BUILDING ENGINEERING | 2022年 / 46卷
基金
新加坡国家研究基金会;
关键词
Microstructure; Hydration; X-ray micro-CT; Linear attenuation coefficient (LAC); Pore characteristics; Solid characteristics; PORE STRUCTURE; COMPUTED-TOMOGRAPHY; MICROTOMOGRAPHY; PERMEABILITY; CONCRETE; NETWORK;
D O I
10.1016/j.jobe.2021.103721
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
X-ray micro-computed tomography (micro-CT) has been widely used in the non-destructive investigation of 3D microstructures of cementitious materials. Microstructures from micro-CT are reconstructed from the attenuated transmitted X-ray intensity through a sample or linear attenuation coefficient (LAC). Although uncertainties can be introduced during processes, such as data collection and microstructure reconstruction, the LAC values are determined based on the X-ray energy level and material composition so that they can be considered as almost absolute measures. In this study, the microstructural evolution of cement paste during hydration was investigated using microstructures with a 4.5 mu m voxel size obtained from X-ray micro-CT. A new phase segmentation method based on the mean LAC values for the pore and unhydrated phases inside the binder was developed. The pore phase features were characterized by porosity, equivalent pore diameter, and two-point probability functions. The findings indicate that the proposed segmentation method is well adapted for micro-CT imaging to identify the characteristics of pores, hydrates, and clinkers.
引用
收藏
页数:12
相关论文
共 37 条
[1]   Utilization of OPC-Pumice composites for efficient heavy metals removal [J].
Amin, M. S. ;
Hashem, F. S. ;
El-Gamal, S. M. A. .
JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE, 2018, 12 (06) :765-773
[2]  
[Anonymous], 2008, HDB MED IMAGE PROCES
[3]   Micro- and nano-X-ray computed-tomography: A step forward in the characterization of the pore network of a leached cement paste [J].
Bossa, Nathan ;
Chaurand, Perrine ;
Vicente, Jerome ;
Borschneck, Daniel ;
Levard, Clement ;
Aguerre-Chariol, Olivier ;
Rose, Jerome .
CEMENT AND CONCRETE RESEARCH, 2015, 67 :138-147
[4]  
Chantler CT, 2005, ATTENUATION SCATTERI
[5]   Characterization of air-void systems in 3D printed cementitious materials using optical image scanning and X-ray computed tomography [J].
Chen, Yu ;
Copuroglu, Oguzhan ;
Rodriguez, Claudia Romero ;
de Mendonca Filho, Fernando F. ;
Schlangen, Erik .
MATERIALS CHARACTERIZATION, 2021, 173
[6]   Comparison of the pore size distributions of concretes with different air-entraining admixture dosages using 2D and 3D imaging approaches [J].
Chung, Sang-Yeop ;
Sikora, Pawel ;
Rucinska, Teresa ;
Stephan, Dietmar ;
Elrahman, Mohamed Abd .
MATERIALS CHARACTERIZATION, 2020, 162
[7]   Overview of the use of micro-computed tomography (micro-CT) to investigate the relation between the material characteristics and properties of cement-based materials [J].
Chung, Sang-Yeop ;
Kim, Ji-Su ;
Stephan, Dietmar ;
Han, Tong-Seok .
CONSTRUCTION AND BUILDING MATERIALS, 2019, 229
[8]   Comparison of lightweight aggregate and foamed concrete with the same density level using image-based characterizations [J].
Chung, Sang-Yeop ;
Abd Elrahman, Mohamed ;
Kim, Ji-Su ;
Han, Tong-Seok ;
Stephan, Dietmar ;
Sikora, Pawel .
CONSTRUCTION AND BUILDING MATERIALS, 2019, 211 :988-999
[9]   Effects of anisotropic voids on thermal properties of insulating media investigated using 3D printed samples [J].
Chung, Sang-Yeop ;
Stephan, Dietmar ;
Abd Elrahmana, Mohamed ;
Han, Tong-Seok .
CONSTRUCTION AND BUILDING MATERIALS, 2016, 111 :529-542
[10]   Correlation between low-order probability distribution functions and percolation of porous concrete [J].
Chung, Sang-Yeop ;
Han, Tong-Seok .
MAGAZINE OF CONCRETE RESEARCH, 2013, 65 (07) :448-460