Improving shallow foundations resting on saturated loose sand by a zeolite-cement mixture: A laboratory study

Document Type : Article

Authors

1 Department of Civil Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran

2 International Institute of Earthquake Engineering and Seismology (IIEES)

Abstract

Improvement of sands is frequently carried out by cement together with several other additives. The common additives have high manufacturing costs and negative environmental impacts during their manufacturing process and recycling in nature. Zeolite as a mineral substance for cement replacement can improve the strength parameters of a treated sand, without the negative deficiencies of the common additives. In this study, unconfined compression strength (UCS) and small-scale 1g model tests were conducted to evaluate the mechanical features of zeolite-treated sand and to study the behavior of shallow foundations rested on zeolite pad, respectively. The results of this study demonstrate that the UCS of the cemented sand samples increase when the cement is replaced by zeolite at an optimum proportion of 40% with 14 and 28 days curing times. Adding this amount of zeolite to cemented sand mixture causes an increase in terms of the improvement rate between 40% and 125% and increases the bearing capacity ratio (BCR) of the strip foundation treated by zeolite pad in the range of 11% and 420%. In addition, zeolite pad leads to decline the settlement of the treated strip footing from 16% to 86% in terms of the settlement reduction ratio (SRR).

Keywords


References

1. Mehta, P.K. Reducing the environmental impact of
concrete", Concrete International, 23(10), pp. 61-66
(2001).
2. Damtoft, J.S., Lukasik, J., Herfort, D., Sorrentino,
D., and Gartner, E.M. Sustainable development and
climate change initiatives", Cement and Concrete Research,
38(2), pp. 115-127 (2008).
3. Khajeh, A., Mola-Abasi, H., and Naderi Semsani,
S. Parameters controlling tensile strength of zeolite
cemented sands", Scientia Iranica A (In Press). DOI:
10.24200/sci.2017.4585.
4. Perraki, T., Kakali, G., and Kontoleon, F. The e ect
of natural zeolites on the early hydration of Portland
cement", Microporous and Mesoporous Materials,
61(1-3), pp. 205-212 (2003).
5. Caputo, D., Liguori, B., and Colella, C. Some
advances in understanding the pozzolanic activity of
zeolites: The e ect of zeolite structure", Cement and
Concrete Research, 30(5), pp. 455-462 (2008).
6. Canpolat, F., Ylmaz, K., Kose, M.M., Sumer, M.,
and Yurdusev, M.A. Use of zeolite, coal bottom
ash and
y ash as replacement materials in cement
production", Cement and Concrete Research, 34(5),
pp. 731-735 (2004).
7. Tuncan, A., Tuncan, M., Koyuncu, H., and Guney,
Y. Use of natural zeolites as a land ll liner", Waste
Management & Research, 21(1), pp. 54-61 (2003).
8. Jafarian, Y., Mehrzad, B., Lee, C.J., and Haddad,
A.H. Centrifuge modeling of seismic foundation-soilfoundation
interaction on lique able sand", Soil Dynamics
and Earthquake Engineering, 97, pp. 184-204
(2017).
9. Jafarian, Y., Haddad, A., and Mehrzad, B. Loadsettlement
mechanism of shallow foundations rested
on saturated sand with upward seepage", International
Journal of Geomechanics, 17(3), pp. 1-14 (2016).
10. Dash, S.K., Krishnaswamy, N.R., and Rajagopal,
K. Bearing capacity of strip footings supported on
geocell-reinforced sand", Geotextiles and Geomembranes,
19(4), pp. 235-256 (2001).
11. ASTM D422 Standard test method for particle-size
analysis of soils", ASTM International, West Conshohocken,
PA (2003).
12. Jafarian, Y., Ghorbani, A., Salamatpoor S. and
Salamatpoor, S. Monotonic triaxial experiments to
evaluate steady-state and liquefaction susceptibility
of Babolsar sand", Journal of Zhejiang University
Science-A, 14(10), pp. 739-750 (2013).
13. Jafarian, Y., Javdanian, H., and Haddad, A. Dynamic
properties of calcareous and siliceous sands under
isotropic and anisotropic stress conditions", Soils and
Foundations, 58(1), pp. 172-184 (2018).
14. Salamatpoor, S. and Salamatpoor, S. Evaluation of
Babolsar sand behaviour by using static triaxial tests
and comparison with case history", Open Journal of
Civil Engineering, 4(3), pp. 181-197 (2014).
15. ASTM C150/C150M-17 Standard speci cation for
Portland cement", ASTM International, West Conshohocken,
PA (2017).
16. ASTM C114-11 Standard test methods for chemical
analysis of hydraulic cement", ASTM International,
West Conshohocken, PA (2011).
17. ASTM D2166 Standard test method for uncon ned
compressive strength of cohesive soil", ASTM International,
West Conshohocken, PA (2006).
18. Ladd, R.S. Preparing test specimens using under
compaction", Geotechnical Testing Journal, 1(1), pp.
16-23 (1978).
19. Liu, C. and Evett, J.B., Soils and Foundations, 4th
Edn., Pearson Education, New Jersey (2004).
20. ASTM D1194-72 Standard test method for bearing
capacity of soil for static load and spread footings",
ASTM International, West Conshohocken, PA (1987).
21. Wood, D.M., Geotechnical Modeling, E. & F.N. Spon
Press, London (2004).
22. Vargas-Monge, W. Ring shear tests on large deformation
of sand", Ph.D. thesis, University of Tokyo (1998).
23. Bishop, A.W., Green, G.E., Garga, V.K., Andresen, A.
and Brown, J.D. A new ring shear apparatus and its
application to the measurement of residual strength",
Geotechnique, 21(4), pp. 273-328 (1971).
24. Kagawa, T. On the similitude in model vibration tests
of earth structures", In Proceedings on Japan Society
of Civil Engineers, pp. 69-77 (1978).
25. Iai, S. Similitude for shaking table tests on soilstructure-

uid model in 1g gravitational eld", Soils
and Foundations, 29(1), pp. 105-118 (1989).
26. Towhata, I., Earthquake Geotechnical Engineering,
Springer, Berlin (2007).
27. Otsubo, M., Towhata, I., Hayashida, T., Liu, B. and
Goto, S. Shaking table tests on liquefaction mitigation
of embedded lifelines by back ll with recycled
materials", Soils and Foundations, 56(3), pp. 365-378
(2016).
2076 S. Salamatpoor et al./Scientia Iranica, Transactions A: Civil Engineering 25 (2018) 2063{2076
28. Mitchell J.K. Soil improvement-State-of-the-art report",
In Proceedings of the 10th International Conference
on Soil Mechanics and Foundation Engineering,
Balkema, Rotterdam, Netherlands, pp. 509-565 (1981).
29. De Beer, E.E. Experimental determination of the
shape factors and the bearing capacity factors of sand",
Geotechnique, 20(4), pp. 387-411 (1970).
30. Vesic, A.S. Analysis of ultimate loads of shallow
foundations", Journal of the Soil Mechanics and Foundations
Division, 99(1), pp. 45-73 (1973).
31. Das, B.M., Shallow Foundations: Bearing Capacity
and Settlement, 2nd Edn., CRC Press (2009).
32. Liu, L. and Dobry, R. Seismic response of shallow
foundation on lique able sand", Journal of Geotechnical
and Geoenvironmental Engineering, 123(6), pp.
557-567 (1997).
33. Adalier, K., Elgamal, A., Meneses, J. and Baez, J.I.
Stone columns as liquefaction counter measure in
non-plastic silty soils", Soil Dynamics and Earthquake
Engineering, 23(7), pp. 571-584 (2003).
34. Dashti, S., Bray, J.D., Pestana, J.M., Riemer, M.
and Wilson, D. Mechanisms of seismically induced
settlement of buildings with shallow foundations on
lique able soil", Journal of Geotechnical and Geoenvironmental
Engineering, 136(1), pp. 151-164 (2010).
35. Binquet, J. and Lee, K.L. Bearing capacity tests on
reinforced earth slabs", Journal of the Geotechnical
Engineering Division, 101(12), pp. 1241-1255 (1975).