Abstract
Microcrack generation and propagation of coarse- and fine-grained granites were investigated under a confocal laser scanning microscope (CLSM) observation. The microphotographs were obtained for different stages of the applied stresses corresponding to the different cracking zones as mentioned in the stress strain relationship of granite. The microphotographs under CLSM showed that the microcracks were initiated from the crack tips where the maximum stress concentration may occur while in previous studies under light microscope (LM) or stereoscopic microscope it was found that the microcracks initiate from the grain boundary. Results revealed that the microcracks were propagated first perpendicular to the loading direction towards the weak crystalline surface of the feldspar and then parallel to the loading direction towards the quartz. Microcracks were also initiated from the corner tips of biotite and then propagated towards the weak crystalline surface of feldspar and then parallel to the loading direction. The microcracks in the fine grain granite were initiated at a later stage of applied stress than the coarse one because it has a numerous number of contacts between the grains offering the high bondage of cementing material. Thus the CLSM observation described in this paper may be considered as an improved method of analyzing microcracks in rocks.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 12th International Conference on Inspection, Appraisal, Repairs and Maintenance of Structures |
| Editors | Yong-Bo Shao, Chat-Tim Tam, Xin-Gang Zhou |
| Publisher | CI-Premier Pte Ltd |
| Pages | 685-692 |
| Number of pages | 8 |
| Volume | 1 |
| ISBN (Electronic) | 9789810851996 |
| Publication status | Published - Jan 1 2010 |
| Externally published | Yes |
| Event | 12th International Conference on Inspection, Appraisal, Repairs and Maintenance of Structures - Yantai, China Duration: Apr 23 2010 → Apr 25 2010 |
Other
| Other | 12th International Conference on Inspection, Appraisal, Repairs and Maintenance of Structures |
|---|---|
| Country | China |
| City | Yantai |
| Period | 4/23/10 → 4/25/10 |
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Keywords
- CLSM
- Microcracks propagation
- Observation of microcracks
ASJC Scopus subject areas
- Civil and Structural Engineering
- Architecture
- Mechanical Engineering
- Building and Construction
Cite this
Observation of microcracks in granite using a confocal laser scanning microscope. / Liu, Shixin; Faisal Anwar, A. H.M.; Byung, Cheol Kim; Ichikawa, Yasuaki.
Proceedings of the 12th International Conference on Inspection, Appraisal, Repairs and Maintenance of Structures. ed. / Yong-Bo Shao; Chat-Tim Tam; Xin-Gang Zhou. Vol. 1 CI-Premier Pte Ltd, 2010. p. 685-692.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Observation of microcracks in granite using a confocal laser scanning microscope
AU - Liu, Shixin
AU - Faisal Anwar, A. H.M.
AU - Byung, Cheol Kim
AU - Ichikawa, Yasuaki
PY - 2010/1/1
Y1 - 2010/1/1
N2 - Microcrack generation and propagation of coarse- and fine-grained granites were investigated under a confocal laser scanning microscope (CLSM) observation. The microphotographs were obtained for different stages of the applied stresses corresponding to the different cracking zones as mentioned in the stress strain relationship of granite. The microphotographs under CLSM showed that the microcracks were initiated from the crack tips where the maximum stress concentration may occur while in previous studies under light microscope (LM) or stereoscopic microscope it was found that the microcracks initiate from the grain boundary. Results revealed that the microcracks were propagated first perpendicular to the loading direction towards the weak crystalline surface of the feldspar and then parallel to the loading direction towards the quartz. Microcracks were also initiated from the corner tips of biotite and then propagated towards the weak crystalline surface of feldspar and then parallel to the loading direction. The microcracks in the fine grain granite were initiated at a later stage of applied stress than the coarse one because it has a numerous number of contacts between the grains offering the high bondage of cementing material. Thus the CLSM observation described in this paper may be considered as an improved method of analyzing microcracks in rocks.
AB - Microcrack generation and propagation of coarse- and fine-grained granites were investigated under a confocal laser scanning microscope (CLSM) observation. The microphotographs were obtained for different stages of the applied stresses corresponding to the different cracking zones as mentioned in the stress strain relationship of granite. The microphotographs under CLSM showed that the microcracks were initiated from the crack tips where the maximum stress concentration may occur while in previous studies under light microscope (LM) or stereoscopic microscope it was found that the microcracks initiate from the grain boundary. Results revealed that the microcracks were propagated first perpendicular to the loading direction towards the weak crystalline surface of the feldspar and then parallel to the loading direction towards the quartz. Microcracks were also initiated from the corner tips of biotite and then propagated towards the weak crystalline surface of feldspar and then parallel to the loading direction. The microcracks in the fine grain granite were initiated at a later stage of applied stress than the coarse one because it has a numerous number of contacts between the grains offering the high bondage of cementing material. Thus the CLSM observation described in this paper may be considered as an improved method of analyzing microcracks in rocks.
KW - CLSM
KW - Microcracks propagation
KW - Observation of microcracks
UR - http://www.scopus.com/inward/record.url?scp=85028652870&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85028652870&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85028652870
VL - 1
SP - 685
EP - 692
BT - Proceedings of the 12th International Conference on Inspection, Appraisal, Repairs and Maintenance of Structures
A2 - Shao, Yong-Bo
A2 - Tam, Chat-Tim
A2 - Zhou, Xin-Gang
PB - CI-Premier Pte Ltd
ER -