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The fundamental compressibility characteristics of solidified dredged marine soil

Siaw-Yi, Jong and Chee-Ming , Chan (2013) The fundamental compressibility characteristics of solidified dredged marine soil. In: 12th International UM Annual Symposium UMTAS 2013 , 8-10 October 2013, Kuala Terengganu, Terengganu .


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Yearly large amount of dredged soils is produced during construction of marine structures in Malaysian waters. Dredged soils are generally dumped or deposited in open water, upland or hydraulic fills. As dredged soils consist mainly of clay, some sand and other minerals, they generally display high compressibility, low yield stresses and low permeability. In order to improve the material‟s properties for possible reuse as sound geo-materials, the addition of solidifying agents, such as ordinary Portland cement (OPC) and fly ash is necessary. This study was aimed to determine the one-dimensional compressibility the treated soil, with relation to the solidifying agent dosage and curing period. Standard oedometer tests were carried out on the untreated and treated dredged soils for comparison purposes. The dredged soils were collected from Sungai Dinding, Lumut, Perak. The solidification was carried out with addition of 10 % solidifying agents by dry weight of the soil, with OPC and fly ash mixed at different proportions. The untreated and mixed samples were lightly kneaded and pressed into individual consolidation rings, measuring 75 mm in diameter and 20 mm in height. The specimens were then cured in a dry condition for 3 and 7 days. The oedometer test results showed encouraging solidification effect of the originally soft, weak dredged soil, where compressibility reduction exceeding 60 % was attained with the OPC-fly ash mixture. The enhanced stiffness also indicates decreased permeability of the treated material, an engineering property desirable in load-bearing geo-materials.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: dredged soils; cement; fly ash; oedometer; compressibility
Subjects: T Technology > TD Environmental technology. Sanitary engineering > TD201-500 Water supply for domestic and industrial purposes
Divisions: Faculty of Civil and Environmental Engineering > Department of Water and Environmental Engineering
Depositing User: Normajihan Abd. Rahman
Date Deposited: 13 Dec 2013 09:59
Last Modified: 21 Jan 2015 08:20
URI: http://eprints.uthm.edu.my/id/eprint/4553
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