Consolidation of Fibrous Peat

1975 ◽  
Vol 101 (8) ◽  
pp. 741-753
Author(s):  
Peter L. Berry ◽  
Brian Vickers
Keyword(s):  
Fibrous Peat

scholarly journals A Study on Factors Influencing the Determination of Moisture Content of Fibrous Peat

2011 ◽  
Vol 2 (2) ◽  
pp. 39-47 ◽  
Author(s):  
Pui Tau Shien ◽  
Seneviratne H.N. ◽  
Dygku Salma Awg Ismail
Keyword(s):  
Moisture Content ◽  
Particle Density ◽  
Peat Soil ◽  
Test Procedure ◽  
Field Measurements ◽  
Standard Test ◽  
Moisture Loss ◽  
Fibrous Peat ◽  
Saturated Sample

Fibrous peat is an undrained peat that usually possesses very high moisture content. However, not all experimental procedures are applicable for determination of moisture content of fibrous peat. This research is aimed at examining the determination of insitu moisture content of fibrous peat using field measurements. The peat soil samples were collected at shallow depths from Asajaya at Kota Samarahan and Taman Kopodims at Matang , Kuching Sarawak by using peat auger. The laboratory tests such as determination of moisture content, fiber content, particle density and ash content were conducted on the collected samples in order to establish relationships between the parameters. Undisturbed peat samples from Matang were subjected to falling head permeability test to determine the saturated permeability. The saturated sample were then allowed to drain freely to simulate the moisture loss possible during sampling when samples were brought out of boreholes. The test results showed that moisture content varies according to the drying temperature and position of the soil sample (top, middle and bottom) during sampling. Comparing samples from both locations, peat soil from Kota Samarahan possessed higher moisture content. The saturated permeability of peat sample was in the range of 2.62 – 3.05 cm/s. The free draining trial showed that moisture loss during sampling significantly influence the moisture content measurement. The variation in value of moisture content for fibrous peat may occurs due to several factors such as existing ground water table, sampling method by boring, existing standard test procedure which is not suitable for peat soils requirement and also because of the physical properties which varied according to depth of soil.

scholarly journals Physical and chemical characteristics of fibrous peat

2017 ◽  
Author(s):  
Yulindasari Sutejo ◽  
Anis Saggaff ◽  
Wiwik Rahayu ◽  
Hanafiah
Keyword(s):  
Chemical Characteristics ◽  
Physical And Chemical Characteristics ◽  
Fibrous Peat ◽  
Physical And Chemical

Cyclic Shearing Behavior and Dynamic Characteristics of a Fibrous Peat

2021 ◽  
Author(s):  
Grytan Sarkar ◽  
Abouzar Sadrekarimi
Keyword(s):  
Dynamic Characteristics ◽  
Damping Ratio ◽  
Volumetric Strain ◽  
Excess Pore Pressure ◽  
Shear Moduli ◽  
Cyclic Shear ◽  
Cyclic Mobility ◽  
Initial Reduction ◽  
Fibrous Peat ◽  
Study Laboratory

Cyclic shearing behavior, dynamic characteristics, and post-cyclic volume change of a peat sublayer from the Port Lands area of Toronto (Ontario, Canada) are investigated in this study. Laboratory specimens are trimmed from block samples collected from a depth of about 4.0 to 4.5 m. Constant-volume cyclic direct simple shear tests indicate an initial reduction of effective stress with number of stress cycles. However, the corresponding excess pore pressure ratios do not exceed 60%, indicating a cyclic mobility behavior in the peat specimens. Maximum shear moduli of the peat samples are also determined from shear wave velocity measurements. Post-cyclic volumetric strain, as well as the variations of secant modulus, modulus reduction, and damping ratio of the peat are presented in terms of cyclic shear strain and compared with other studies. Empirical relationships are proposed for characterizing the shear modulus and damping ratio of Toronto peat.

Evaluating the compression index of fibrous peat treated with different binders

2016 ◽  
Vol 76 (2) ◽  
pp. 575-586 ◽  
Author(s):  
Ali Dehghanbanadaki ◽  
Ali Arefnia ◽  
Azin Keshtkarbanaeemoghadam ◽  
Kamarudin Ahmad ◽  
Shervin Motamedi ◽  
...  
Keyword(s):  
Compression Index ◽  
Fibrous Peat

Prediction of geotechnical properties of treated fibrous peat by artificial neural networks

2018 ◽  
Vol 78 (3) ◽  
pp. 1345-1358 ◽  
Author(s):  
Ali Dehghanbanadaki ◽  
Mohammad Ali Sotoudeh ◽  
Iman Golpazir ◽  
Azin Keshtkarbanaeemoghadam ◽  
Marjan Ilbeigi
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Geotechnical Properties ◽  
Fibrous Peat ◽  
Artificial Neural

Effect of Cement-Sodium Silicate Grout on the Compressibility Parameters of Fibrous Peat

2012 ◽  
Vol 629 ◽  
pp. 461-465
Author(s):  
Kazemian Sina ◽  
Moayedi Hossien
Keyword(s):  
Portland Cement ◽  
Sodium Silicate ◽  
Laboratory Study ◽  
Land Surface ◽  
Ordinary Portland Cement ◽  
Void Ratio ◽  
Compression Index ◽  
Land Utilization ◽  
Peat Deposits ◽  
Fibrous Peat

The distribution of peat deposits can be found in many countries and peat-land constituents from 5 to 8% of earth land surface, where approximately 60% of the wetlands are peat. An increasing growth of the population leads to the necessity of peat-land utilization for development purposes. This article describes a laboratory study on the effect of sodium silicate on the compressibility parameters of peat, which are settlement, void ratio, compression index and coefficient of secondary compression. The effect of the sodium silicate and ordinary Portland cement on the compressibility parameter of peat is investigated through Rowe Cell consolidation test. At the end of this study, it is shown by increasing sodium silicate (within 2.5%), cement on treated peat, they are able to improve compressibility parameters of fibrous peat much more than conventional binders like pure cement.

Creep behaviour of intact and remoulded fibrous peat

2017 ◽  
Author(s):  
Mohan P. Acharya ◽  
Michael T. Hendry ◽  
C. Derek Martin
Keyword(s):  
Creep Behaviour ◽  
Fibrous Peat

Effect of fibre content and structure on anisotropic elastic stiffness and shear strength of peat

2012 ◽  
Vol 49 (4) ◽  
pp. 403-415 ◽  
Author(s):  
Michael T. Hendry ◽  
Jitendra S. Sharma ◽  
C. Derek Martin ◽  
S. Lee Barbour
Keyword(s):  
Shear Strength ◽  
Confining Pressure ◽  
Deviatoric Stress ◽  
Direct Shear ◽  
Shear Tests ◽  
Direct Shear Tests ◽  
A Value ◽  
Frictional Strength ◽  
Fibrous Peat ◽  
Interparticle Friction

This paper presents the results of a laboratory testing program involving consolidated undrained triaxial tests and direct shear tests on remoulded peat, remoulded peat fibre, and Shelby specimens of peat obtained from a field site located in the Edson subdivision of the Canadian National railway in Alberta, Canada. These results were analyzed within the frameworks of elastic behaviour of cross-anisotropic materials and shear strength of fibre-reinforced soil. Shelby specimens were found to be inherently cross-anisotropic, whereas the remoulded peat and peat fibre specimens showed a transition from isotropic to cross-anisotropic with increasing vertical strain and effective confining pressure. The horizontal stiffness of Shelby specimens was found to be 2.6 to 2.9 times their vertical stiffness. The shear strength of intact peat is made up of interparticle friction as well as tension in the peat fibres. A novel procedure for estimating the interparticle frictional strength of fibrous peat from CU triaxial test results is proposed. It involves extrapolating the linear strain-hardening portion of the stress–strain curve to obtain the deviatoric stress at zero axial strain and plotting the deviatoric stress values thus obtained against initial mean effective confining pressure to obtain the frictional strength. Using this procedure, a value of 31° was obtained for the interparticle friction, which compares favourably with a value of 31° obtained from direct shear tests. It is recommended that further studies be undertaken to assess if interparticle frictional strength is an appropriate strength parameter for evaluation of the stability of structures founded on fibrous peat.

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