348
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th
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
Proceedings of the 18
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International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
for cemented non- to low-swelling clays (Horpibulsuk et al.,
2011b). It was suggested to take the
B
-value as 1.27 for the
cemented non- to low-swelling clays (Horpibulsuk et al., 2011a,
b and 2012a). To employ Eq. (2) for assessing the strength of
any lightweight cemented clay at different void/cement ratios
(air content and cement content), the parameters
A
and
B
must
be predetermined. This task can be achieved by a back-
calculation of at least two trial strength data.
7 REFERENCES
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Géotechnique
4 (1), 6-15.
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Les fontaines publiques de la ville de Dijon
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Chinkulkijniwat A. and Horpibulsuk S. 2012. Field strength
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0 5 10 15 20 25 30 35 40 45
0
500
1000
1500
2000
Lightweight cemented Bangkok clay
7 days of curing
q
u(
w
=136%)
=23897/(
V/C
)
1.26
|r|=0.937
q
u(
w
=157%)
=18533/(
V/C
)
1.26
|r|=0.954
q
u(
w
=178%)
=15818/(
V/C
)
1.29
|r|=0.966
q
u(
w
=199%)
=12051/(
V/C
)
1.28
|r|=0.943
q
u(
w
=241%)
=8373/(
V/C
)
1.29
|r|=0.933
Void/cement ratio,
V
/
C
Unconfined compressive strength,
q
u
(kPa)
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Horpibulsuk S. and Miura N. 2001. A new approach for studying
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and Geoenvironmental Engineering
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Figure 6. Analysis of strength development in lightweight cemented
Bangkok clay using
V
/
C
.
Horpibulsuk S., Katkan W., Sirilerdwattana W. and Rachan R. 2006.
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grained soils: Laboratory and field study.
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5 CONCLUSIONS
Based on this study, it is brought out that the void/cement ratio
is the prime parameter for analysis of strength and deformation
behavior of lightweight cemented clays with non- to high
swelling potential. This parameter takes into account the
influence of both clay fabric reflected by the air volume and the
level of cementation. The conclusion can be drawn as follows.
Horpibulsuk S., Liu M.D., Liyanapathirana D.S. and Suebsuk J. 2010.
Behavior of cemented clay simulated via the theoretical framework
of the Structured Cam Clay model.
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1-9.
Horpibulsuk S., Rachan R. and Suddeepong A. 2011a. Assessment of
strength development in blended cement admixed Bangkok clay.
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25 (4), 1521-1531.
1. For a given soft clay at a particular water content, the
cementation bond strength increases as void/cement ratio,
V/C
decreases. Consequently, the yield stress in K
0
-consolidation
and compressive strength increases with the decrement of
V
/
C
.
The stress-strain response and compression characteristics in
pre-yield state are practically the same as long as the
V/C
value
is identical.
Horpibulsuk S., Rachan R., Suddeepong A. and Chinkulkijniwat, A.,
2011b. Strength development in cement admixed Bangkok clay:
laboratory and field investigations.
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51 (2),
239-251.
Horpibulsuk S., Phojan W., Chinkulkijniwat A., and Liu M.D. 2012a.
Strength development in blended cement admixed saline clay.
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55, 44-52.
2. Based on the void/cement ratio and Abram’s law, a
relationship between strength, void/cement ratio for a particular
water content and curing time (Eq.2) is proposed. The
relationship is useful in estimating the laboratory strength
wherein air content and cement content vary over a wide range
by a few trial tests. It also facilitates the determination of proper
quantity of cement to be admixed for different air contents to
attain the target strength. The formulation of the proposed
relationship is on sound principle and developed from distinct
clays (non- to high swelling clays). The
A
and
B
values can be
determined by a back-analysis of at least two trial strength data.
It is thus possibly applicable for various clays.
Horpibulsuk, S., Suddeepong, A., Chinkulkijniwat, A., and Liu, M.D.
2012b. Strength and compressibility of lightweight cemented clays.
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Suebsuk J., Horpibulsuk S. and Liu M.D. 2010. Modified Structured
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6 ACKNOWLEDGEMENTS
This work was supported by the Higher Education Research
Promotion and National Research University Project of
Thailand, Office of Higher Education Commission. The
financial support and facilities that were provided by the
Suranaree University of Technology were appreciated.
Suebsuk J., Horpibulsuk S. and Liu M.D. 2011. A critical state model
for overconsolidated structured clays.
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38, 648-658.
