An attempt has been made to investigate the lime induced permeability changes in the permeability and engineering behavior of different lime column treated soil systems. Lime columns treated marine clay shows an increase in permeability up to a maximum value of 15-18 times that of untreated soil with time. The shear strength of the treated soil systems show an increment up to 8-10 that of untreated soil within a period of 30-45 days curing. In the case of lime injection systems, the permeability has been increased up to 10-15 times that of untreated soil, whereas the strength of the soil has been higher by 8-10 times that of untreated soil. Further, consolidation tests show a reduction in the compressibility up to 1/2-1/3 of original values. The test results revealed that both lime column and injection techniques could be used to improve the behaviour of underwater marine clay deposits. © 2001 Published by Elsevier Science Ltd.

S. Narasimha Rao

Lime

Shear strength

Soil mechanics

Underwater soils

Marine clay

Clay

permeability

Soil

MARINE SEDIMENT

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Permeability characteristics of lime treated marine clay

Ocean Engineering

Dredged sediments have been extensively used in various parts of the world for applications related to various infrastructural developmental activities, such as land reclamation, building construction, beach replenishment, habitat restoration, and so on. The vicinity of the megacities to the water bodies and shortage of naturally available raw materials for the developmental activities is mostly responsible for such a paradigm shift from the conventional application of natural resources (soils and rock mass). However, utilization of dredged sediments has largely been constrained because of their heterogeneity and also because most of the earlier studies were site specific; hence, these findings cannot be generalized. This calls for a critical analysis of the outcome of the existing studies related to the application of such sediments based on their comprehensive characterization, in infrastructure development, policies adopted in this context, challenges in terms of handling and disposal, and potential of these sediments to contaminate the ecosystem. As highlighted in this paper, such a critical review of the literature would be mandatory for framing the guidelines in establishing the beneficial usages of the dredged sediments as an artificial resource. © 2016 American Society of Civil Engineers.

Journal	Ocean Engineering
ISSN	00298018
Open Access	No