TY - GEN
T1 - Strength and deformation of biologically cemented sandstone
AU - Van Paassen, L. A.
AU - Van Loosdrecht, M. C.M.
AU - Pieron, M.
AU - Mulder, A.
AU - Ngan-Tillard, D. J.M.
AU - Van Der Linden, T. J.M.
PY - 2010
Y1 - 2010
N2 - A new method for ground improvement is being developed: BioGrout, a method based on microbial-induced carbonate precipitation. The feasibility of this method was tested in a field scale experiment: within 12 days 40 m 3 of sand was biologically cemented stretching over a length of 5 m between three injection and three extraction points. In this paper we present the mechanical characteristics of the biologically cemented sand, based on strength tests on the cores collected from the field scale experiment. The results are compared with other natural and artificially cemented sandstones. Correlations could be established between CaCO 3 content, dry density and strength at several confining stresses. From the strength tests the parameters describing the failure criterion-cohesion and friction angle- could be derived, which enable engineering design.
AB - A new method for ground improvement is being developed: BioGrout, a method based on microbial-induced carbonate precipitation. The feasibility of this method was tested in a field scale experiment: within 12 days 40 m 3 of sand was biologically cemented stretching over a length of 5 m between three injection and three extraction points. In this paper we present the mechanical characteristics of the biologically cemented sand, based on strength tests on the cores collected from the field scale experiment. The results are compared with other natural and artificially cemented sandstones. Correlations could be established between CaCO 3 content, dry density and strength at several confining stresses. From the strength tests the parameters describing the failure criterion-cohesion and friction angle- could be derived, which enable engineering design.
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M3 - Conference contribution
AN - SCOPUS:84859921546
SN - 9780415804813
T3 - Rock Engineering in Difficult Ground Conditions - Soft Rocks and Karst - Proceedings of the Regional Symposium of the International Society for Rock Mechanics, EUROCK 2009
SP - 405
EP - 410
BT - Rock Engineering in Difficult Ground Conditions - Soft Rocks and Karst - Proceedings of the Regional Symposium of the International Society for Rock Mechanics, EUROCK 2009
T2 - Regional Symposium of the International Society for Rock Mechanics: Rock Engineering in Difficult Ground Conditions - Soft Rocks and Karst, EUROCK 2009
Y2 - 29 October 2009 through 31 October 2009
ER -