Fiber Effects on Compressibility of Peat

Johari, N N; Bakar, Ismail; Razali, Siti Nooraiin Mohd; Wahab, Norhaliza

doi:10.1088/1757-899x/136/1/012036

Cited by 16 publications

(20 citation statements)

References 4 publications

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“…One of the parameters related to porosity behavior reported in table 4 is pores value (e), ranging from 5.04 to 6.63. The value obtained is slightly lower than the (e) value reported by Johari et al (2016) for peat soil from Parit Nipah Darat. The value of pores (e) or often mentioned as a void ratio, is defined as a (volumetric) ratio of the volume of void space (fluid and air together) (V v ) and volume of solids (V s ).…”

Section: Porosity and Volumetric Moisture Contentcontrasting

confidence: 76%

Water Retention and Saturation Degree of Peat Soil in Sebangau Catchment Area, Central Kalimantan

Sajarwan¹,

Jaya²,

Banuwa³

2021

j Trop. Soils

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Water is an essential factor in forming, utilization, management, and sustainability of peat soil. This study was to obtain characteristics of water retention and porosity of peat soil. Peat samples were taken from the Natural Laboratory of Peat Forest, Central Kalimantan at shallow, medium, and deep peat at 0-50cm (surface) and 50-100 cm (subsurface), while laboratory analyses carried out at Soil Laboratory, Universitas Gajahmada. The result shows that volumetric moisture content at the surface lower than subsurface, except for deep peat. The total pore for the surface was 84.67-86.98%, while subsurface layers were 83.53-86.93%. For surface layer, saturated degree (S) medium peat higher than shallow and deep peat, while for shallow subsurface peat higher than medium and deep peat. S value all pF levels of surface for medium and deep peat higher than the subsurface. Bulk density for surface was 0.094g.cm-3 (rb(wet)) and 0.22g.cm-3(rb (dry)) for shallow peat while medium peat are 0.084–0.087g.cm-3(rb(wet)) and 0.18–0.20g.cm-3(rb(dry)), deep peat 0.064–0.090g.cm-3(rb(wet)) and 0.11–0.16g.cm-3(rb(dry)). For subsurface, bulk density of medium peat are 0.094–0.107g.cm-3 (rb(wet)) and 0.16–0.20g.cm-3 (rb(dry)), deep peat are 0.067–0.090g.cm-3 (rb(wet)) and 0.10–0.17g.cm-3 (rb(wet)). The particle density of surface and subsurface for shallow peat higher than medium and deep peat, with values 0.67-0.77g.cm3, 0.61-0.66g.cm3, and 0.53-0.63g.cm3 for shallow, medium, and deep peat, respectively. Total pores for the surface layer decrease with increasing dry bulk density (R = 0.624) and particle density (R = 0.375). This fact seems to confirm a directly proportional relationship between parameters bulk and particle density with total pores.

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Section: Porosity and Volumetric Moisture Contentcontrasting

confidence: 76%

Water Retention and Saturation Degree of Peat Soil in Sebangau Catchment Area, Central Kalimantan

Sajarwan¹,

Jaya²,

Banuwa³

2021

j Trop. Soils

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“…At the same time it is also caused by because the segregation effect where higher decomposition leads to lower water content. According to Johari et al [5] the water content of the peat soil was depends on the organic matters and fiber content in the soil. Figure 8 depict the liquid limit graph for undisturbed peat was 370%.…”

Section: B Distribution Of Peat Sizementioning

confidence: 99%

“…The provided schematic diagram in Figure 1 gives an understandable description of the peat arrangement which consists of fiber and organic particles. Kogure et al [3] had been developed the physical model of peat structure, which then elaborate by Wong et al [4] and Johari et al [5] in the schematic diagram as depicted in Figure 1. Based on Figure 1, it can distinguish the components of peat is divided into two major components which are organic bodies and organic spaces.…”

Section: Introductionmentioning

confidence: 99%

“…The structure arrangement of peat and the decomposition level gives different results each test in determining the physical properties of the peat soil. [3,4,5] Commonly, peat soil can be discovered and elaborated as soil formed from the dead wetland substance that cannot decay in a normal way due to the presence of a high water table. When the organic matter decomposed, it change into a sort of glue known as humus, which is strong enough to tie several smaller particles together, accomplishing them into larger multi-particles thus can alter the behavior of the soil [6].…”

Section: Introductionmentioning

confidence: 99%

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Segregation Peat Fiber and Pre- Consolidation Pressure Effect on the Physical Properties of Reconstituted Peat Soil

Wahab,

Basri,

Talib

et al. 2019

IJEAT

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The preparation of the undisturbed peat sample at the site must be conducted to understand its characteristics. However, the sampling process becoming difficult due to the condition of peat soils itself. Due to the limitation in gaining undisturbed sample, a study on reconstitution sample becoming more popular in term of investigating the properties of soil that represent the real site condition. The main purpose of this paper was to investigate the physical properties of undisturbed and reconstituted peat RS3.350, RS2.360, RS1.000 and RS0.425. In this study, the segregation of peat and expulsion water with the aids pre-consolidation pressure was applied to the reconstituted sample. The range value of the physical properties of reconstituted peat was varied from each type of peat classification which affected by the segregation fiber and pre-consolidation pressure effect method. The entire reconstituted peat samples were recons passing the opening sieve size 3.350mm, 2.360mm, 1.000mm and 0.425 mm and were subjected with the 50 kPa, 80 kPa and 100 kPa pre-consolidation pressures. As a result, the natural Parit Nipah peat soil was classified as hemic peat (H5). The percentage of water content, liquid limit, organic content and fiber content for the reconstituted sample is lower compared to the undisturbed peat sample; but differed from specific gravity where the percentage for the reconstituted sample was higher than the undisturbed sample. Conclusively, the segregation of peat fiber and pre-consolidation pressure methods greatly affect and change the physical properties of peat samples.

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“…At 12.5 kPa, the Cv value is 11.546 cm 2 /min. The values of coefficient of consolidation Cv are slightly higher than the West Johor, Peninsular Malaysia peat (10.305 cm 2 /min) found (Johari et al, 2016). The compressibility of Klias peat and immediate settlement had been observed, the basic properties are shown significant in determination of peat settlement behaviour.…”

Section: Dial Reading Versus Time Curvesmentioning

confidence: 73%

Compressibility behaviour and engineering properties of North Borneo Peat Soil

Mohamad¹,

Zainorabidin²,

Musta³

et al. 2021

Eurasian Journal of Soil Science (Ejss)

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Article InfoIt is known that peat soil is highly compressible. A constituent of peat soil from Klias, Sabah covering a wide range of index properties of fiber contents, specific gravity, organic contents and moisture contents were subjected to one-dimensional consolidation tests. This paper presents the engineering properties and compressibility behavior of sapric type of tropical peat soil. In this role, the high compressibility of Klias peat stands out as a most significant engineering property. With this intention, the purpose of this paper is to provide a simple and analytical means for predicting the consolidation settlement of sapric peat deposit under loading. The rate of primary compression, after a certain time. Increases with the logarithm of time. Loading applied from low stress to high stresses started from 2, 6.25, 12.5, 25, 50, 100 and 200 kPa resulting in high compression index, Cc and ratio, C'c. The Klias peat soil represented sapric type of tropical peat with organic content is 98.43% and lower fiber content which is about 18% of the specimen. Compressibility index Cc, Coefficient of consolidation Cv, and Compression index, Cc, was identified as a crucial component of parameters in determination of settlements behaviour of peat soil. The coefficient of consolidation, Cv, was determined within the range of 1.264 to 12.911 cm 2 /min and requires special considerations in laboratory testing procedures and interpretation of results.

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Fiber Effects on Compressibility of Peat

Cited by 16 publications

References 4 publications

Water Retention and Saturation Degree of Peat Soil in Sebangau Catchment Area, Central Kalimantan

Water Retention and Saturation Degree of Peat Soil in Sebangau Catchment Area, Central Kalimantan

Segregation Peat Fiber and Pre- Consolidation Pressure Effect on the Physical Properties of Reconstituted Peat Soil

Compressibility behaviour and engineering properties of North Borneo Peat Soil

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