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Article: Crack coalescence in molded gypsum and carrara marble: Part 2 - Microscopic observations and interpretation

TitleCrack coalescence in molded gypsum and carrara marble: Part 2 - Microscopic observations and interpretation
Authors
KeywordsUniaxial compressive loading test
White patches
Tensile cracks
Shear cracks
SEM
Microcracking zones
ESEM
Issue Date2009
Citation
Rock Mechanics and Rock Engineering, 2009, v. 42, n. 3, p. 513-545 How to Cite?
AbstractExperimental uniaxial compression loading tests were conducted on molded gypsum and Carrara marble prismatic specimens to study the cracking and coalescence processes between pre-existing artificial flaws. The study showed that material had an influence on the cracking and coalescence processes (see the companion paper in this issue). As reported in the companion paper, one of the pronounced features as observed in the high-speed video recordings was the development of macroscopic white patches prior to the development of observable cracks in marble, but not in gypsum. This paper (part 2) deals with the microscopic aspects of the study. Specifically, the scanning electron microscope (SEM) and the environmental scanning electron microscope (ESEM) imaging techniques were used to study the microscopic development of white patches and their evolution into macroscopic tensile cracks and shear cracks in marble, and the microscopic initiation of hair-line tensile cracks and their evolution into macroscopic tensile cracks in gypsum. The microscopic imaging study in marble showed that the white patches were associated with extensive microcracking zones (process zones), while the extent of process zone development in gypsum was limited. The comparison of the macroscopic and microscopic results indicates that the different extent of microcracking zone development, related to the material textural properties, is a key factor leading to different macroscopic cracking behavior in gypsum and marble. © 2008 Springer-Verlag.
Persistent Identifierhttp://hdl.handle.net/10722/213923
ISSN
2015 Impact Factor: 2.386
2015 SCImago Journal Rankings: 1.939

 

DC FieldValueLanguage
dc.contributor.authorWong, L. N Y-
dc.contributor.authorEinstein, H. H.-
dc.date.accessioned2015-08-19T13:41:14Z-
dc.date.available2015-08-19T13:41:14Z-
dc.date.issued2009-
dc.identifier.citationRock Mechanics and Rock Engineering, 2009, v. 42, n. 3, p. 513-545-
dc.identifier.issn0723-2632-
dc.identifier.urihttp://hdl.handle.net/10722/213923-
dc.description.abstractExperimental uniaxial compression loading tests were conducted on molded gypsum and Carrara marble prismatic specimens to study the cracking and coalescence processes between pre-existing artificial flaws. The study showed that material had an influence on the cracking and coalescence processes (see the companion paper in this issue). As reported in the companion paper, one of the pronounced features as observed in the high-speed video recordings was the development of macroscopic white patches prior to the development of observable cracks in marble, but not in gypsum. This paper (part 2) deals with the microscopic aspects of the study. Specifically, the scanning electron microscope (SEM) and the environmental scanning electron microscope (ESEM) imaging techniques were used to study the microscopic development of white patches and their evolution into macroscopic tensile cracks and shear cracks in marble, and the microscopic initiation of hair-line tensile cracks and their evolution into macroscopic tensile cracks in gypsum. The microscopic imaging study in marble showed that the white patches were associated with extensive microcracking zones (process zones), while the extent of process zone development in gypsum was limited. The comparison of the macroscopic and microscopic results indicates that the different extent of microcracking zone development, related to the material textural properties, is a key factor leading to different macroscopic cracking behavior in gypsum and marble. © 2008 Springer-Verlag.-
dc.languageeng-
dc.relation.ispartofRock Mechanics and Rock Engineering-
dc.subjectUniaxial compressive loading test-
dc.subjectWhite patches-
dc.subjectTensile cracks-
dc.subjectShear cracks-
dc.subjectSEM-
dc.subjectMicrocracking zones-
dc.subjectESEM-
dc.titleCrack coalescence in molded gypsum and carrara marble: Part 2 - Microscopic observations and interpretation-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s00603-008-0003-3-
dc.identifier.scopuseid_2-s2.0-67349160239-
dc.identifier.volume42-
dc.identifier.issue3-
dc.identifier.spage513-
dc.identifier.epage545-

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