Details
| Original language | English |
|---|---|
| Title of host publication | Mechanics and Physics of Creep, Shrinkage, and Durability of Conrete |
| Subtitle of host publication | A Tribute to Zdenek P. Bazant |
| Publisher | American Society of Civil Engineers (ASCE) |
| Pages | 150-157 |
| Number of pages | 8 |
| ISBN (print) | 9780784413111 |
| Publication status | Published - 25 Sept 2013 |
| Externally published | Yes |
| Event | 9th International Conference on Creep, Shrinkage, and Durability Mechanics: A Tribute to Zdenek P. Bazant, CONCREEP 2013 - Cambridge, MA, United States Duration: 22 Sept 2013 → 25 Sept 2013 |
Publication series
| Name | Mechanics and Physics of Creep, Shrinkage, and Durability of Conrete: A Tribute to Zdenek P. Bazant - Proceedings of the 9th Int. Conf. on Creep, Shrinkage, and Durability Mechanics, CONCREEP 2013 |
|---|
Abstract
Small angle X-ray scattering analyses of the nanostructure of hardened cement paste proved to be a highly suitable method to study structural changes due to creep of the material during loading. The short-term loading and creep experiments described in this paper were carried out on small, hardened, cement paste samples (10 x 10 x 0.4 mm3). The specimens were subjected to a compressive load in the plane of the platelets while being penetrated by an X-ray beam perpendicular to the platelet, leading to a scattering of the X-ray beam. By using the Bragg's law for X-ray diffraction in combination with Porod's theorem for X-ray scattering, these experiments allow for a direct insight into micro-structural processes on the 10-9 to 10-7 m scale occurring during shrinkage, creep, and creep recovery of hardened cement paste specimen stimulated by in-situ drying, loading and unloading of the sample. Whereas previous experiments of the authors were limited to investigation in vacuum, similar experiments can now be performed in any climatic condition. The gained results indicate that creep of hardened cement paste under load leads to an increase of the inner specific surface of the material, probably related to inter-crystalline processes.
ASJC Scopus subject areas
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Building and Construction
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Mechanics and Physics of Creep, Shrinkage, and Durability of Conrete: A Tribute to Zdenek P. Bazant . American Society of Civil Engineers (ASCE), 2013. p. 150-157 (Mechanics and Physics of Creep, Shrinkage, and Durability of Conrete: A Tribute to Zdenek P. Bazant - Proceedings of the 9th Int. Conf. on Creep, Shrinkage, and Durability Mechanics, CONCREEP 2013).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - New experimental approach to study creep and shrinkage mechanisms of concrete on the nano-scale level
AU - Müller, Harald S.
AU - Eckhardt, Joerg Detlef
AU - Haist, Michael
PY - 2013/9/25
Y1 - 2013/9/25
N2 - Small angle X-ray scattering analyses of the nanostructure of hardened cement paste proved to be a highly suitable method to study structural changes due to creep of the material during loading. The short-term loading and creep experiments described in this paper were carried out on small, hardened, cement paste samples (10 x 10 x 0.4 mm3). The specimens were subjected to a compressive load in the plane of the platelets while being penetrated by an X-ray beam perpendicular to the platelet, leading to a scattering of the X-ray beam. By using the Bragg's law for X-ray diffraction in combination with Porod's theorem for X-ray scattering, these experiments allow for a direct insight into micro-structural processes on the 10-9 to 10-7 m scale occurring during shrinkage, creep, and creep recovery of hardened cement paste specimen stimulated by in-situ drying, loading and unloading of the sample. Whereas previous experiments of the authors were limited to investigation in vacuum, similar experiments can now be performed in any climatic condition. The gained results indicate that creep of hardened cement paste under load leads to an increase of the inner specific surface of the material, probably related to inter-crystalline processes.
AB - Small angle X-ray scattering analyses of the nanostructure of hardened cement paste proved to be a highly suitable method to study structural changes due to creep of the material during loading. The short-term loading and creep experiments described in this paper were carried out on small, hardened, cement paste samples (10 x 10 x 0.4 mm3). The specimens were subjected to a compressive load in the plane of the platelets while being penetrated by an X-ray beam perpendicular to the platelet, leading to a scattering of the X-ray beam. By using the Bragg's law for X-ray diffraction in combination with Porod's theorem for X-ray scattering, these experiments allow for a direct insight into micro-structural processes on the 10-9 to 10-7 m scale occurring during shrinkage, creep, and creep recovery of hardened cement paste specimen stimulated by in-situ drying, loading and unloading of the sample. Whereas previous experiments of the authors were limited to investigation in vacuum, similar experiments can now be performed in any climatic condition. The gained results indicate that creep of hardened cement paste under load leads to an increase of the inner specific surface of the material, probably related to inter-crystalline processes.
UR - http://www.scopus.com/inward/record.url?scp=84887368069&partnerID=8YFLogxK
U2 - 10.1061/9780784413111.017
DO - 10.1061/9780784413111.017
M3 - Conference contribution
AN - SCOPUS:84887368069
SN - 9780784413111
T3 - Mechanics and Physics of Creep, Shrinkage, and Durability of Conrete: A Tribute to Zdenek P. Bazant - Proceedings of the 9th Int. Conf. on Creep, Shrinkage, and Durability Mechanics, CONCREEP 2013
SP - 150
EP - 157
BT - Mechanics and Physics of Creep, Shrinkage, and Durability of Conrete
PB - American Society of Civil Engineers (ASCE)
T2 - 9th International Conference on Creep, Shrinkage, and Durability Mechanics: A Tribute to Zdenek P. Bazant, CONCREEP 2013
Y2 - 22 September 2013 through 25 September 2013
ER -