Propagating and Reconstructing Cracks in 3D in Cement-Based Materials

Abstract:

Three-dimensional reconstruction and quantitative calculation were performed by X-ray computerized tomography to propagate cracks in paste, mortar, and concrete specimens. Cracking could be observed, and the number and width of cracks increased with increasing strain and load. In mortar and concrete specimens, the number and width of cracks remained unchanged with increasing strain and load; however, a sudden increase in the number and width of cracks nearly destroyed the specimens. Cracks developed along the interface of the aggregate and the mortar in the mortar specimen. In the concrete specimen, cracks continued to grow through the coarse aggregate when cracking occurred along the stress direction. However, cracks developed along the interface of the aggregate and the coarse aggregate when cracking was independent of the stress direction.

• Periodical: Applied Mechanics and Materials (Volumes 578-579)
• Pages: 1441-1445
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.578-579.1441
• Online since: July 2014
• Authors: Guan Guo Liu*, Aibin Ma, Hong Gen Qin, Ping Zhang
• Keywords: Crack, Quantitative Calculation, Three-Dimensional Reconstruction, X-CT

References

[1] Zihai Shi, Masaaki Nakano,  Yukari Nakamura, Cuiping Liu. Discrete crack analysis of concrete gravity dams based on the known inertia force field of linear response analysis[J], Engineering Fracture Mechanics, 2014(115): 122–136.

DOI: 10.1016/j.engfracmech.2013.10.020

[2] B. Goszczyńska. Analysis of the process of crack initiation and evolution in concrete with acoustic emission testing[J], Archives of Civil and Mechanical Engineering, 2014(14): 134–143.

DOI: 10.1016/j.acme.2013.06.002

[3] C.C. Yang S.W. Chob L.C. Wang The relationship between pore structure and chloride diffusivity from ponding test in cement-based materials Materials Chemistry and Physics 2005. 11.

DOI: 10.1016/j.matchemphys.2005.12.032

[4] Yaodong Jia, Peiyu Yan. Computed tomography technology for microstructural studying on cement-based materials: a review on the state of the art[J]. Journal of the Chinese Ceramic Society，2010, 38（7）：1346-1356.

[5] Marcos Lanzóna, Veerle Cnuddeb, Tim de Kockb, Jan Dewanckeleb. X-ray microtomography (μ-CT) to evaluate microstructure of mortars containing low density additions[J]. Cement and Concrete Composites, 2012, 34(8): 993–1000.

DOI: 10.1016/j.cemconcomp.2012.06.011

[6] Ping Zhang, Honggen Qin, Yikun Hou, Chaoming Pang, Wei Sun. Weiling Zhou. Study of concrete deterioration under immersion in simulated seawater [C]. 2012 International Conference on Civil, Architectural and Hydraulic Engineering, 2012. 08. 10-12, Zhangjiajie, China: 2330-2333, (2012).

DOI: 10.4028/www.scientific.net/amm.204-208.2330

[7] Tian Wei，Dang Faning，Ding Weihua, Liang Xinyu, Chen Houqun. Development of a dynamic loading apparatus for CT experiment and its application[J]. Rock and Soil Mechanics，2010，31（1）：309-313.

[8] Chen Houqun，Ding Weihua，Dang Faning, et al. Quantitative analysis of equivalent crack region in CT images of concrete[J]. Journal of China Institute of Water Resources and Hydropower Research March，2006，4（1）：1-7.