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Titel |
Filling material for a buried cavity in a collapse area using light-weighted
foam and active feldspar |
VerfasserIn |
Jin Woo Cho, Ju-hyoung Lee, Sung-Wook Kim, Eun-Kyeong Choi |
Konferenz |
EGU General Assembly 2017
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Medientyp |
Artikel
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Sprache |
en
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Digitales Dokument |
PDF |
Erschienen |
In: GRA - Volume 19 (2017) |
Datensatznummer |
250147395
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Publikation (Nr.) |
EGU/EGU2017-11555.pdf |
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Zusammenfassung |
Concrete which is generally used as filling material for a buried cavity has very high strength
but significantly high self-load is considered its disadvantage. If it is used as filling material,
the second collapse due to additional load, causing irreversible damage. If light-weighted
foam and active feldspar are used to solve this problem, the second collapse can be prevented
by reducing of self-load of filling material.
In this study, the specimen was produced by mixing light-weighted foam, active
feldspar and cement, and changes in the density, unconfined compressive strength
and hydraulic conductivity were analyzed. Using the light-weighted foam could
enable the adjustment of density of specimen between 0.5 g/cm3 and 1.7 g/cm3, and
if the mixing ratio of the light-weighted foam increases, the specimen has more
pores and smaller range of cross-sectional area. It is confirmed that it has direct
correlation with the density, and if the specimen has more pores, the density of
the specimen is lowered. The density of the specimen influences the unconfined
compressive strength and the hydraulic conductivity, and it was also confirmed that
the unconfined compressive strength could be adjusted between 0.6 MPa and 8
MPa and the hydraulic conductivity could be adjusted between 10−9cm/sec and
10−3cm/sec. These results indicated that we can adjust unconfined compressive
strength and hydraulic conductivity of filling materials by changing the mixing
amount of lightweight-weighted foam according to the requirements of the field
condition.
Keywords: filling material, buried cavity, light-weighted foam, feldspar
Acknowledgement
This research was supported by a Grant from a Strategic Research Project (Horizontal
Drilling and Stabilization Technologies for Urban Search and Rescue (US&R)
Operation) funded by the Korea Institute of Civil Engineering and Building Technology. |
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