Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 258-264 |
| Number of pages | 7 |
| Journal | Proceedings of the Institution of Civil Engineers - Construction Materials |
| Volume | 170 |
| Issue number | 5 |
| Early online date | 5 Nov 2015 |
| DOIs | |
| Publication status | Published - Oct 2017 |
| Externally published | Yes |
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Performance of bitumen protective coatings for buried concrete. / Abubaker, Farhat; Cripps, John C.; Lynsdale , Cyril J.; Sadeghi Pouya, Homayoon.
In: Proceedings of the Institution of Civil Engineers - Construction Materials, Vol. 170, No. 5, 10.2017, p. 258-264.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Performance of bitumen protective coatings for buried concrete
AU - Abubaker, Farhat
AU - Cripps, John C.
AU - Lynsdale , Cyril J.
AU - Sadeghi Pouya, Homayoon
PY - 2017/10
Y1 - 2017/10
N2 - Following the discovery in the late 1990s of seriously damaged M5 motorway bridge foundations due to thaumasite formation, the standards for buried concrete were changed. Binder types and mix designs to resist aggressive ground conditions are specified; however, in highly aggressive conditions it may be necessary to utilise additional protective measures including surface coatings to ensure the survival of buried concrete structures. Such measures may also be used to prevent deterioration of concrete of lesser specification than would be required for a particular ground aggressivity. The paper presents results from a long-term laboratory-based study in which concrete cubes of high susceptibility to thaumasite attack, with and without bitumen coatings, were exposed to sulfate-rich solutions at 4·5°C for 5 years. Moreover, concrete prisms of the same concrete and three others of different susceptibilities to attack, each with one bitumen-coated face, were buried in pyrite-bearing clay for 9 years, at 4·5°C. All types of concrete tested suffered significant attack, whereas the bitumen coating, even if damaged, proved successful in preventing deterioration of even the most vulnerable concretes. The paper concludes with a brief discussion of the potential benefits of using coatings for the protection of buried concrete.
AB - Following the discovery in the late 1990s of seriously damaged M5 motorway bridge foundations due to thaumasite formation, the standards for buried concrete were changed. Binder types and mix designs to resist aggressive ground conditions are specified; however, in highly aggressive conditions it may be necessary to utilise additional protective measures including surface coatings to ensure the survival of buried concrete structures. Such measures may also be used to prevent deterioration of concrete of lesser specification than would be required for a particular ground aggressivity. The paper presents results from a long-term laboratory-based study in which concrete cubes of high susceptibility to thaumasite attack, with and without bitumen coatings, were exposed to sulfate-rich solutions at 4·5°C for 5 years. Moreover, concrete prisms of the same concrete and three others of different susceptibilities to attack, each with one bitumen-coated face, were buried in pyrite-bearing clay for 9 years, at 4·5°C. All types of concrete tested suffered significant attack, whereas the bitumen coating, even if damaged, proved successful in preventing deterioration of even the most vulnerable concretes. The paper concludes with a brief discussion of the potential benefits of using coatings for the protection of buried concrete.
U2 - 10.1680/jcoma.15.00022
DO - 10.1680/jcoma.15.00022
M3 - Article
VL - 170
SP - 258
EP - 264
JO - Proceedings of Institution of Civil Engineers: Construction Materials
JF - Proceedings of Institution of Civil Engineers: Construction Materials
SN - 1747-650X
IS - 5
ER -