Abstract
This paper shows and discusses the results of a comprehensive mineralogical and microstructural investigation carried out on several samples collected from diaphragm walls obtained treating a deposit of overconsolidated clay with the cutter soil mixing (CSM) technology, one of the most recent methods for deep mixing. To this purpose, scanning electron microscopy, X-ray powder diffraction analysis, mercury intrusion porosimetry, and X-ray computed micro-tomography were extensively used to measure soil properties at the micro-scale. In addition, unconfined compression tests and permeability tests were conducted to evaluate the effectiveness of CSM also at the macro-scale. The capability of CSM to treat cohesive soils seems to be confirmed by the experimental investigation carried out so far, considering, particularly, the degree of mixture homogeneity achieved at the end of the mixing procedure, together with the growth of several hydration products in the cemented matrix.
Issue Section:
Research Papers
References
1.
Bouma
, J.
, Jongerius
, A.
, Boersma
, O.
, Jager
, A.
, and Schoonderbeek
, D.
, 1977
, “The Function of Different Types of Macropores during Saturated Flow Through Four Swelling Soil Horizons
,” Soil Sci. Soc. Am. J.
, Vol. 41
, pp. 945
–950
. https://doi.org/10.2136/sssaj1977.03615995004100050028x2.
Cameron
, K. C.
and Buchan
, G. D.
, 2006
, “Porosity and Pore Size Distribution
,” Encyclopedia of Soil Science
, 2nd Ed. Lal
R.
, Ed., Boca Raton, FL
, pp. 1350
–1353
.3.
Chew
, S. H.
, Kamruzzaman
, A. H. M.
, and Lee
, F. H.
, 2004
, “Physicochemical and Engineering Behavior of Cement Treated Clays
,” J. Geotech. Eng. Div.
, Vol. 130
, No. 7
, pp. 696
–706
. https://doi.org/10.1061/(ASCE)1090-0241(2004)130:7(696)4.
Chotard
, T. J.
, Smith
, A.
, Boncoeur
, M. P.
, Fargeot
, D.
, and Gault
, C.
, 2003
, “Application of X-ray Computed Tomography to Characterize the Early Hydration of Calcium Aluminate Cement
,” Cement Concrete Compos.
, Vol. 25
, No. 1
, pp. 145
–152
. https://doi.org/10.1016/S0958-9465(01)00063-45.
Ciufegni
, S.
, Sacchi
, F.
, and Utzeri
, L.
, 2012
, “Bologna’s New HS Station: Support and Consolidation Works on Excavations and Monitoring System
,” Ingegneria Ferroviaria
, Vol. 3
, pp. 211
–230
.6.
Cnudde
, V.
, Cwirzen
, A.
, Masschaele
, B.
, and Jacobs
, P. J. S.
, 2009
, “Porosity and Microstructure Characterization of Building Stones and Concretes
,” Eng. Geol.
, Vol. 103
, pp. 76
–83
. https://doi.org/10.1016/j.enggeo.2008.06.0147.
Colling
, K.
and McGown
, A.
, 1974
, “The Form and Function of Microfabric Features in a Variety of Natural Soils
,” Géotechnique
, Vol. 24
, No. 2
, pp. 223
–254
.8.
Cook
, R. A.
and Hover
, K. C.
, 1999
, “Mercury Porosimetry of Hardened Cement Paste
,” Cement Concrete Res.
, Vol. 29
, No. 6
, pp. 933
–943
. https://doi.org/10.1016/S0008-8846(99)00083-69.
D’Acqui
, L. P.
, Bruand
, A.
, and Pagliai
, M.
, 1993
, “Study of Soil Porosity With Mercury Porosimetry and Image Analysis on Backscattered Electron Scanning Images (BESI). Application to Tilled “Crusting Soils” in Zimbabwe
,” Soil Micromorpohlogy: Studies in Management and Genesis, Vol. 22, Developments in Soil Science Series
, Ringrose-Voase
A. J.
and Humphreys
G. S.
, Eds., Elsevier
, pp. 581
–590
.10.
Dal Ferro
, N.
, Delmas
, P.
, Duwig
, C.
, Simonetti
, G.
, and Morari
, F.
, 2012
, “Coupling X-Ray Microtomography and Mercury Intrusion Porosimetry to Quantify Aggregate Structures of a Cambisol Under Different Fertilization Treatments
,” Soil Tillage Res.
, Vol. 119
, No. 1
, pp. 13
–21
. https://doi.org/10.1016/j.still.2011.12.00111.
Diamond
, S.
, 2000
, “Mercury Porosimetry: An Inappropriate Method for the Measurement of Pore Size Distributions in Cement-Based Materials
,” Cement Concrete Res.
, Vol. 30
, No. 10
, pp. 1517
–1525
. https://doi.org/10.1016/S0008-8846(00)00370-712.
Elaqra
, H.
, Godin
, N.
, Peix
, G.
, R’Mili
, M.
, and Fantozzi
, G.
, 2007
, “Damage Evolution Analysis in Mortar, During Compressive Loading Using Acoustic Emission and X-Ray Tomography: Effects of the Sand/Cement Ratio
,” Cement Concrete Res.
, Vol. 37
, No. 5
, pp. 703
–713
. https://doi.org/10.1016/j.cemconres.2007.02.00813.
Elliot
, T. R.
, Reynolds
, W. D.
, and Heck
, R. J.
, 2010
, “Use of Existing Pore Models and X-Ray Computed Tomography to Predict Saturated Soil Hydraulic Conductivity
,” Geoderma
, Vol. 156
, Nos. 3–4
, pp. 133
–142
. https://doi.org/10.1016/j.geoderma.2010.02.01014.
Farber
, L.
, Tardos
, G.
, and Michaels
, J. N.
, 2003
, “Use of X-Ray Tomography to Study the Porosity and Morphology of Granules
,” Powder Technol.
, Vol. 132
, No. 1
, pp. 57
–63
. https://doi.org/10.1016/S0032-5910(03)00043-315.
Fiorotto
, R.
, Stötzer
, E.
, Schöpf
, M.
, and Brunner
, W.
, 2005
, “Cutter Soil Mixing (CSM)—An Innovation in Soil Mixing for Creating Cut-Off and Retaining Walls
,” Proceedings of the International Conference on Deep Mixing—Best Practice and Recent Advances
, Swedish Deep Stabilization Research Centre
, Stockholm, Sweden
, May 23–25, Vol. 1
, No. 1, pp. 521
–526
.16.
Garcia-Bengochea
, I.
, Lovell
, C. W.
, and Altschaeffl
, A. G.
, 1979
, “Pore Distribution and Permeability of Silty Clays
,” J. Geotech. Eng. Div.
, Vol. 105
, No. 7
, pp. 839
–856
.17.
Gerressen
, F.-W.
and Vohs
, T.
, 2012
, “CSM—Cutter Soil Mixing—Worldwide Experiences of a Young Soil Mixing Method in Soft Soils
,” Proceedings of the 4th International Conference on Grouting and Deep Mixing
, New Orleans, LA
, February 15–18.18.
Gregg
, S. J.
and Sing
, S. W.
, 1982
, “Adsorption, Surface Area and Porosity
,” 2nd ed., Academic Press
, New York
.19.
Hu
, J.
and Stroeven
, P.
, 2003
, “Application of Image Analysis to Assessing Critical Pore Size for Permeability Prediction of Cement Paste
,” Image Anal. Stereol.y
, Vol. 22
, No. 2
, pp. 97
–103
. https://doi.org/10.5566/ias.v22.p97-10320.
Juang
, C.
and Hottz
, R.
, 1986
, “A Probabilistic Permeability Model and the Pore Size Density Function
,” Int. J. Num. Anal. Methods Geomech.
, Vol. 10
, pp. 543
–553
. https://doi.org/10.1002/nag.161010050621.
Kak
, A. C.
and Slaney
, M.
, 1988
, Principles of Computerized Tomographic Imaging
, IEEE Press
, New York
.22.
Klobes
, P.
, Riesemeier
, H.
, Meyer
, K.
, Goebbels
, J.
, and Hellmuth
, K. H.
, 1997
, “Rock Porosity Determination by Combination of X-Ray Computerized Tomography With Mercury Porosimetry
,” Fresenius J. Anal. Chem.
, Vol. 357
, pp. 543
–547
. https://doi.org/10.1007/s00216005021023.
Kuba
, A.
and Herman
, G. T.
, 2008
, “Some Mathematical Concepts for Tomographic Reconstruction
,” Advanced Tomographic Methods in Material Research and Engineering
, Banhart
J.
, Ed., Oxford University Press
, New York
, pp. 19
–36
.24.
Lange
, D. A.
, Jennings
, H. M.
, and Shah
, S. P.
, 1994
, “Image Analysis Techniques for Characterization of Pore Structure of Cement-Based Materials
,” Cement Concrete Res.
, Vol. 24
, No. 5
, pp. 841
–853
. https://doi.org/10.1016/0008-8846(94)90004-325.
Larsson
, S.
, 2001
, “Binder Distribution in Lime-Cement Columns
,” Proc. ICE—Ground Improv.
, Vol. 5
, No. 3
, pp. 111
–122
.26.
Larsson
, S.
, 2005
, “State of Practice Report—Execution, Monitoring and Quality Control
,” Proceedings of the. International Conference on Deep Mixing—Best Practice and Recent Advances
, Swedish Deep Stabilization Research Centre
, Stockholm, Sweden
, May 23–25, Vol. 1
, pp. 732
–785
.27.
Madhyannapu
, R. S.
, Puppala
, A. J.
, Nazarian
, S.
, and Yuan
, D.
, 2010
, “Quality Assessment and Quality Control of Deep Soil Mixing Construction for Stabilizing Expansive Subsoils
,” J. Geotech. Geoenviron. Eng.
, Vol. 136
, No. 1
, pp. 119
–128
. https://doi.org/10.1061/(ASCE)GT.1943-5606.000018828.
Mitchell
, J.
and Soga
, K.
, 2005
, Fundamentals of Soil Behavior
, 3rd ed., Wiley
, Hoboken, NJ
.29.
Modmoltin
, C.
and Voottipruex
, P.
, 2009
, “Influence of Salts on Strength of Cement-Treated Clays
,” Proc. ICE—Ground Improv.
, Vol. 162
, No. 1
, pp. 15
–26
.30.
Moore
, D. M.
and Reynolds
, R. C.
, 1989
, X-Ray Diffraction and the Identification and Analysis of Clay Minerals
, Oxford University Press
, Oxford, U.K.
31.
Moro
, F.
and Böhni
, H.
, 2002
, “Ink-Bottle Effect in Mercury Intrusion Porosimetry of Cement-Based Materials
,” J. Colloid Interface Sci.
, Vol. 246
, No. 1
, pp. 135
–149
. https://doi.org/10.1006/jcis.2001.796232.
Münch
, B.
and Holzer
, L.
, 2008
, “Contradicting Geometrical Concepts in Pore Size Analysis Attained With Electron Microscopy and Mercury Intrusion
,” J. Am. Ceram. Soc.
, Vol. 91
, No. 12
, pp. 4059
–4067
. https://doi.org/10.1111/j.1551-2916.2008.02736.x33.
Okumura
, T.
, 1996
, “Deep Mixing Method of Japan
,” Proceedings of the 2nd International Conference on Ground Improvement Geosystems
, Tokyo, Japan
, May 14–17, Vol. 2
, pp. 879
–887
.34.
Porbaha
, A.
, Ghaheri
, F.
, and Puppala
, A. J.
, 2005
, “Soil Cement Properties From Borehole Geophysics Correlated With Laboratory Tests
,” Proc. Int. Conf. on Deep Mixing—Best Practice and Recent Advances
, Swedish Deep Stabilization Research Centre
, Stockholm, Sweden
, May 23–25, Vol. 1
, No. 1, pp. 605
–611
.35.
Rajasekaran
, G.
and Narasimha Rao
, S.
, 2000
, “Strength Characteristic of Lime-Treated Marine Clay
,” Proc. ICE—Ground Improv.
, Vol. 4
, No. 3
, pp. 127
–136
. https://doi.org/10.1680/grim.2000.4.3.12736.
Sahu
, S.
, Badger
, S.
, Thaulow
, N.
, and Lee
, R.
, 2004
, “Determination of Water-Cement Ratio of Hardened Concrete by Scanning Electron Microscopy
,” Cement Concrete Compos.
, Vol. 26
, No. 8
, pp. 987
–992
. https://doi.org/10.1016/j.cemconcomp.2004.02.03237.
Schaetzl
, R. J.
and Anderson
, S.
, 2005
, “Soils: Genesis and Geomorphology
,” Cambridge University Press
, Cambridge, U.K.
38.
Schnaid
, F.
, Prietto
, P. D. M.
, and Consoli
, N. C.
, 2001
, “Characterization of Cemented Sand in Triaxial Compression
,” J. Geotech. Eng. Div.
, Vol. 127
, No. 10
, pp. 857
–868
. https://doi.org/10.1061/(ASCE)1090-0241(2001)127:10(857)39.
Serra
, J.
, 1982
, Image Analysis and Mathematical Morphology
, Academic Press
, Orlando, FL
.40.
Sides
, G.
and Barden
, L.
, 1971
, “The Microstructure of Dispersed and Flocculated Samples of Kaolinite, Illite, and Montmorillonite
,” Can. Geotech. J.
, Vol. 8
, pp. 391
–399
. https://doi.org/10.1139/t71-04141.
Stepkowska
, E. T.
, 1994
, “Microstructural Reasons of Improvement of an Alluvial Clay by Admixtures
,” Proceedings of the 13th ICSMGE
, New Delhi, India
, January 5–10, pp. 1187
–1190
.42.
Taylor
, H. F. W.
, 1997
, Cement Chemistry
, 2nd ed., Thomas Telford
, London, U.K.
43.
Tekin
, I.
, Birgul
, R.
, and Aruntas
, H. Y.
, 2012
, “Determination of the Effect of Volcanic Pumice Replacement on Macro Void Development for Blended Cement Mortars by Computerized Tomography
,” Construct. Build. Mater.
, Vol. 35
, pp. 15
–22
. https://doi.org/10.1016/j.conbuildmat.2012.02.08444.
Terashi
, M.
, 1997
, “Theme Lecture: Deep Mixing Method—Brief State of the Art
,” Proceedings of the 14th ICSMGE
, Hamburg, Germany
, September 6–12, Vol. 4
, pp. 2475
–2478
.45.
Vogel
, H.-J.
and Roth
, K.
, 2001
, “Quantitative Morphology and Network Representation of Soil Pore Structure
,” Adv. Water Res.
, Vol. 24
, Nos. 3–4
, pp. 233
–242
. https://doi.org/10.1016/S0309-1708(00)00055-546.
Vogel
, H.-J.
, Weller
, U.
, and Schlüter
, S.
, 2010
, “Quantification of Soil Structure Based on Minkowski Functions
,” Comput. Geosci.
, Vol. 36
, No. 10
, pp. 1236
–1245
. https://doi.org/10.1016/j.cageo.2010.03.00747.
Voçka
, R.
, Gallè
, C.
, Dubois
, M.
, and Lovera
, P.
, 2000
, “Mercury Intrusion Porosimetry and Hierarchical Structure of Cement Pastes: Theory and Experiments
,” Cement Concrete Res.
, Vol. 30
, No. 4
, pp. 521
–527
. https://doi.org/10.1016/S0008-8846(99)00252-548.
Wilkinson
, A.
, Haque
, A.
, and Kodikara
, J.
, 2010
, “Stabilization of Clayey Soils With Industrial By-Product: Part A
,” Proc. ICE—Ground Improv.
, Vol. 163
, No. 3
, pp. 149
–163
. https://doi.org/10.1680/grim.2010.163.3.14949.
Wong
, H. S.
, Buenfeld
, N. R.
, and Head
, M. K.
, 2006
, “Estimating Transport Properties of Mortars Using Image Analysis on Backscattered Electron Images
,” Cement Concrete Res.
, Vol. 36
, No. 8
, pp. 1556
–1566
. https://doi.org/10.1016/j.cemconres.2006.05.00250.
Wong
, H. S.
, Zimmerman
, R. W.
, and Buenfeld
, N. R.
, 2012
, “Estimating the Permeability of Cement Pastes and Mortars Using Image Analysis and Effective Medium Theory
,” Cement Concrete Res.
, Vol. 42
, No. 2
, pp. 476
–483
. https://doi.org/10.1016/j.cemconres.2011.11.018
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