Effect of geometrical sand drains on consolidation of soft contaminated marine clays using Oedometer

2013 ◽  
pp. 631-636
Author(s):  
M Shah ◽  
A Shroff
Keyword(s):  
Marine Clays

Weathering in a marine clay during postglacial time

Clay Minerals ◽  
1985 ◽  
Vol 20 (4) ◽  
pp. 477-491 ◽  
Author(s):  
K. Pederstad ◽  
P. Jørgensen
Keyword(s):  
Sea Level ◽  
Mixed Layer ◽  
Major Part ◽  
Marine Clay ◽  
Size Fractions ◽  
Se Norway ◽  
Marine Clays

AbstractMarine clays of SE Norway lifted above sea-level have been subjected to weathering for 8500 years. As a result of this weathering a major part of the quartz, K-feldspar and plagioclase disappeared in the 0·2–0·6 µm fraction. Trioctahedral illite passed through the sequence: illite → mixed-layer illite-vermiculite → vermiculite → dissolution. This transformation started at a depth of 3 m, and the 2:1 layers dissolved in the upper part of the profile. Chlorite was broken down by weathering into finer particles. As a result, chlorite was first removed from the coarser fractions. Dioctahedral illite in the clay fractions passed through the following transformations in the upper part of the profile: illite → mixed-layer illite-vermiculite → vermiculite → chloritized vermiculite. Weathering models for the size fractions 0·2–0·6 and 0·2–2 µm showed that total amounts of dissolved material from these fractions in the upper part of the profile could be calculated as 55 and 38%, respectively. Dioctahedral 2:1 layers were most resistant to weathering, resulting in 75% dioctahedral phyllosilicates in the 0·2–0·6 µm fraction in the uppermost part of the profile, in contrast to 30% dioctahedral illite in the unweathered sample. This study illustrates the importance of investigating different fractions and not only material finer than 2 µm.

Effects of frequency and confining pressure on consolidation drainage behavior of soft marine clays

2018 ◽  
Vol 37 (6) ◽  
pp. 746-754 ◽  
Author(s):  
Yong-Hong Miao ◽  
Fan-Bo Zhou ◽  
Jie Yin ◽  
Yan-Chang Sun ◽  
Rui-Bing Li ◽  
...  
Keyword(s):  
Confining Pressure ◽  
Marine Clays ◽  
Consolidation Drainage
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