Observations of microcracking in cement paste upon drying and rewetting by environmental scanning electron microscopy
This study reports some preliminary observations of microcracks in hardened high performance cement paste (i.e., cement paste of low water:binder ratio). Specimens were examined at high magnifications and at relative humidities ranging from 0 to 100% in an environmental scanning electron microscope...
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Published in | Advanced cement based materials Vol. 3; no. 1; pp. 14 - 19 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
1996
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Abstract | This study reports some preliminary observations of microcracks in hardened high performance cement paste (i.e., cement paste of low water:binder ratio). Specimens were examined at high magnifications and at relative humidities ranging from 0 to 100% in an environmental scanning electron microscope (ESEM). Direct microcracks were observed in samples that had not been dried, indicating that microcracks are probably an intrinsic feature of high performance concrete. It was further observed that the microcracks widened upon drying and closed again upon rewetting. Some practical consequences of these findings are discussed briefly. |
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AbstractList | This study reports some preliminary observations of microcracks in hardened high performance cement paste (i.e., cement paste of low water:binder ratio). Specimens were examined at high magnifications and at relative humidities ranging from 0 to 100% in an environmental scanning electron microscope (ESEM). Direct microcracks were observed in samples that had not been dried, indicating that microcracks are probably an intrinsic feature of high performance concrete. It was further observed that the microcracks widened upon drying and closed again upon rewetting. Some practical consequences of these findings are discussed briefly. |
Author | Jennings, Hamlin M. Kjellsen, Knut O. |
Author_xml | – sequence: 1 givenname: Knut O. surname: Kjellsen fullname: Kjellsen, Knut O. organization: Swedish Cement and Concrete Research Institute, Stockholm, UK – sequence: 2 givenname: Hamlin M. surname: Jennings fullname: Jennings, Hamlin M. organization: Department of Civil Engineering and Department of Materials and Engineering, Northwestern university, Evanston, Illinois, USA |
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Cites_doi | 10.1016/0008-8846(82)90085-0 10.1002/sca.4950120105 10.1016/0008-8846(83)90133-3 10.1016/0008-8846(82)90017-5 10.1016/0008-8846(81)90018-1 10.1016/0008-8846(84)90136-4 10.1016/0008-8846(85)90097-3 10.1111/j.1151-2916.1992.tb04243.x 10.1016/0958-9465(92)90004-F 10.1016/0008-8846(89)90068-9 10.1016/0008-8846(93)90071-G 10.1016/0008-8846(80)90095-2 10.1016/0008-8846(86)90130-4 10.1016/0008-8846(82)90008-4 10.1016/0008-8846(88)90029-4 |
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Keywords | Microcracking self-desiccation High performance concrete Rewetting Electron microscopy Drying Environmental scanning |
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SubjectTerms | Drying Electron microscopy Environmental scanning High performance concrete Microcracking Rewetting self-desiccation |
Title | Observations of microcracking in cement paste upon drying and rewetting by environmental scanning electron microscopy |
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