Geotechnics of Organic Soils and Peat

Huat, Bujang B. K.; Prasad, Arun; Asadi, Afshin; Kazemian, Sina

doi:10.1201/b15627

Cited by 98 publications

(124 citation statements)

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“…Zainorabidin et al (2010) have reported the application of image analysis using Picasa and analySIS software to identify and quantify the presence of fibres in peat for classification purposes. However, despite the structure of peat, in its various aspects, affecting the engineering behaviour, there has been virtually no research reported that correlates different structural types with physical and engineering properties (Huat et al, 2014).…”

Section: Use Of Digital Imaging Methodsmentioning

confidence: 99%

Briefing: Atterberg limits and peat

O’Kelly

2016

Environmental Geotechnics

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The Atterberg limits are the most common tests specified by practising geotechnical engineers worldwide. These tests, which have physical meaning for fine-grained mineral soils, are regularly specified for peat and other highly organic soils despite fundamental issues regarding their appropriateness for such materials. These issues are explored in this briefing from which it is concluded that Atterberg limit concepts are inappropriate for peat and are unlikely to meaningfully correlate with mechanical (strength) behaviour. In assessing likely engineering behaviour of peat, a more useful suite of index tests is natural water content, organic content, fibre content and degree of humification.For correlations with strength and compressibility parameters, Dutch organic soil practice has found that water content and bulk density are usually sufficient.

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Section: Use Of Digital Imaging Methodsmentioning

confidence: 99%

Briefing: Atterberg limits and peat

O’Kelly

2016

Environmental Geotechnics

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“…Next, the liquid limit test was conducted based on BS1377: Part 2: 1990: 4.3 The liquid limit percentages of the peat soil sample is 264% while the plastic limit percentages is 139%. The data obtained shows that liquid limit and plastic limit is high and can be categorized as peat [2], [6]. Table 3(a) shows plastic limit of the soil sample, Table 3(b) shows liquid limit of the soil sample and Figure 4 shows the liquid limit of the soil sample.…”

Section: Alterbert Limit Testmentioning

confidence: 99%

Stabilization of Peat Soil by Using Envirotac

et al. 2017

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Abstract. Peat soil is wet and soft. It is also known as a very soft and difficult soil with high water and organic content, low shear strength, low bearing capacity and their mechanical chemical and biological properties degenerate with time. The characteristics and geotechnical properties of peat soil are mainly related to its high moisture content and high organic content respectively. This is very challenging to geotechnical engineers and construction industry as peat soil characteristic can cause excessive settlement.Soil stabilisation is the process of improving the engineering properties of the soil which will then in return make it more stable. As a result of soil stabilization, the bearing capacity and the strength of the soil will increase with an added bonus of water tightness, resistance to wash out and other properties which will also be improved. In this research, Envirotac polymer is used as the soil stabilizer which is in a form of liquid. This study is done in order to investigate the optimum mix proportion of Envirotac as a liquid stabilizer on Peat soil. The objective of this study was to determine the strength effects of 15%, 30% and 45% of Envirotec on peat sample and to investigate the shrinkage effect of stabilizing peat soil by using Envirotac. A mould sample with a diameter of 50mm and a height of 100mm was prepared. Samples were then tested after 7, 14 and 21 days. The physical properties tests conducted for this research are the Atteberg limits and moisture content test, while the mechanical test was Unconfined Compressive strength (UCS) test. The tests were carried out according to BS 1377: 1990. From the result, 30% Envirotac on peat sample has higher strength from control sample and more economical compare to use 45% Envirotac which had greater shrinkage effect

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“…The high of shear strength of peat will not actually reflect high of friction angle. This is because, [19] state that the fact the fibers are not always solid and may be filled with water and gas. From the all figure it can be observed that peat achieve the high shear strength with addition of lime compare to cement.…”

Section: Treated Peat Soil (Lime and Cement)mentioning

confidence: 99%

“…The internal friction angle of control sample was found to be 40.78°. Based on [19] the average effective angle of friction is 53° for the peats and clearly above the average angle of 41° for the organic soils.…”

Section: 21mentioning

confidence: 99%

Peat Soil Stabilization using Lime and Cement

Zambri

Ghazaly

2018

E3S Web Conf.

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Abstract. This paper presents a study of the comparison between two additive Lime and Cement for treating peat soil in term of stabilization. Peat and organic soils are commonly known for their high compressibility, extremely soft, and low strength. The aim of this paper is to determine the drained shear strength of treated peat soil from Perlis for comparison purposes. Direct Shear Box Test was conducted to obtain the shear strength for all the disturbed peat soil samples. The quick lime and cement was mixed with peat soil in proportions of 10% and 20% of the dry weight peat soil. The experiment results showed that the addition of additives had improved the strength characteristics of peat soil by 14% increment in shear strength. In addition, the mixture of lime with peat soil yield higher result in shear strength compared to cement by 14.07% and 13.5% respectively. These findings indicate that the lime and cement is a good stabilizer for peat soil, which often experienced high amount of moisture content.

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Geotechnics of Organic Soils and Peat

Cited by 98 publications

References 0 publications

Briefing: Atterberg limits and peat

Briefing: Atterberg limits and peat

Stabilization of Peat Soil by Using Envirotac

Peat Soil Stabilization using Lime and Cement

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