A Study on Linear Shrinkage Behavior of Peat Soil Stabilized with Eco-Processed Pozzolan (EPP)

Sulaiman, Mohamad S.; Mohamad, Habib Musa; Suhaimi, Anis A.

doi:10.28991/cej-2022-08-06-05

Cited by 8 publications

(3 citation statements)

References 22 publications

(25 reference statements)

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“…The increments in elemental composition values from Peat + EPP 10% (%) to > Peat + EPP 40% (%) show the potential of EPP research as a stabilizer material. This finding is in line with the statement of the previous study, which is that EPP can potentially help reduce the shrinkage by almost 66.66% [38]. These improvements were identified as the phase of a crystalline material between peat and EPP relationships as discovered by Suhaimi & Mohamad [39], who observed crystalline structure in the presence of EPP and cement in peat soil.…”

Section: Figure 11 Treated Peat Soilsupporting

confidence: 92%

Peat Soil Compaction Characteristic and Physicochemical Changes Treated with Eco-Processed Pozzolan (EPP)

Sutarno

Mohamad²

2023

Civ Eng J

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Peat soil was defined as the highly organic surface layer derived primarily from plant remains. Peat, on the other hand, was the subsurface of wetland systems, consisting of unconsolidated superficial layers with a high non-crystalline colloid (humus) content. Peat soils have a low shear strength of 5 to 20 kPa, a high compressibility of 0.9 to 1.5, and a high moisture content of >100%. The purpose of the study was to prognosticate the potential of Eco-Processed Pozzolan (EPP) as peat soil stabilization material with improved technique and its consequence of the methods, which was the peat soils index properties and analyse the characteristics of the peat soil stabilization before and after treatment using Eco-Processed Pozzolan (EPP). The soil was mixed with 10, 20, and 30% Eco-Processed Pozzolan (EPP) and then compacted (compaction test) in a metal mould with an internal diameter of 105 mm using a 2.5 kg rammer of 50 mm diameter, freefalling from 300 mm above the top of the soil Three layers compaction of approximately equal depth and 27 blows spread evenly over the soil surface for each layer. The expected result to accomplish the main purpose was to prognosticate the potential Eco-Processed Pozzolan (EPP) as peat soil stabilization material with improved technique and its consequence of the methods. According to the findings, peat soil treated with EPP will transform its qualities from peat to usable soil. However, the presence of moisture will reduce the mixture's ability. According to the findings of this study, the optimum EPP for stabilizing peat soils was 30-40%. Correspondingly, the elemental composition of peat soil mixed with EPP improved regardless of Carbon, Ca composition. Comparatively, the amount of Silicon, Si increased from 6.5% (Peat + EPP 10%) to 12.9% (Peat + EPP 40%) due to the crystallization of EPP and peat. Doi: 10.28991/CEJ-2023-09-01-07 Full Text: PDF

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Section: Figure 11 Treated Peat Soilsupporting

confidence: 92%

Peat Soil Compaction Characteristic and Physicochemical Changes Treated with Eco-Processed Pozzolan (EPP)

Sutarno

Mohamad²

2023

Civ Eng J

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“…The most important factors are the carbon nitrogen ratio and lignin content in the quality of litter [23], which can promote or inhibit mineralization. However, due to the difference of climate, vegetation and soil type in different ecosystems [24,25], the impact of litter addition on organic carbon mineralization varies greatly. The experimental process can be expressed through models [26], among which the first-order kinetic model can effectively describe the mineralization process of soil after adding different litters.…”

Section: Introductionmentioning

confidence: 99%

Effects of Salinity and pH Change Conditions on Organic Carbon Mineralization in Saline Alkali Land

Yalu,

Chengfu,

Runcai

et al. 2023

Pol. J. Environ. Stud.

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Little attention has been paid to the process of mineralization of saline-alkali soils. Effects of litter addition and no addition on organic carbon mineralization in saline-alkali soil under different salinity and pH conditions under simulated natural state. The results showed that litter addition significantly (P<0.05) increased the cumulative mineralization of the 3 plots. Under the same salinity and pH conditions (except pH 10.5), the Alashan (ALS) plot has the highest cumulative mineralization among the 3 plots; under different conditions, there is no significant effect on the mineralization of the ALS plot; the Wulanchabu (WLCB) plot The mineralization amount was the highest at S9 and pH10.5, which were 2.23 g•kg -1 and 1.84 g•kg -1 , respectively; the mineralization amount of the Eerduosi (ERDOS) plot decreased significantly with the gradient (P<0.05). The cumulative mineralization process fits the first-order kinetic model. Therefore, changes in salinity and pH conditions are not the most important factors affecting the cumulative mineralization of the 3 plots, but the physical and chemical properties of the soil itself and the chemical composition of litter have a closer influence on it.

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“…There are two (2) categories in evaluating characteristics of dynamic loading behaviour [7]. The post cyclic yield shear strength of undisturbed peat soil is considerably lower compared to static shear strength [8].…”

Section: Introductionmentioning

confidence: 99%

Maximum Strain Effect and Secant Modulus Variation of Hemic Peat Soil at large Deformation due to Cyclic Loading

Mohamad

Zainorabidin²,

Mohamad³

2022

Civ Eng J

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This study presents the findings obtained in post-cyclic behaviour and degradation of shear strength from the static triaxial test, cyclic triaxial test and post-cyclic monotonic triaxial test to study the dynamic loading relationships with the degradation of shear strength after cyclic loading to the maximum strain effect due for Hemic peat soil and aim of this research was to assess the post-cyclic loading condition that brought to the understanding of secant modulus by using dynamic triaxial apparatus. It begins with a visual inspection of fibre characteristics. This is followed by an analysis of static, cyclic, and post-cyclic loading with stress-strain behaviour. Shear strength decreased and notched lower strength than its initial strength. As a matter of fact, PNpt-25 kPa from 1, 2, and 3 Hz are accumulated in the adjacent maximum strain. With regards to this maximum strain, the undrained shear strength ratio shows sequent decreases from higher to lower frequency applied. For instance, PNpt-25 kPa-1Hz to PNpt-25 kPa-3Hz recorded 1.16 to 1.13 undrained shear strength ratios, respectively. The secant modulus (Esec) for all specimens reflects decrement. The secant modulus for BSpt at an effective stress of 100 kPa in static monotonic is about 18.74 MPa, while in post-cyclic, the secant modulus expanded to 19.630 MPa cyclically loaded with 1 Hz. Unfortunately, the secant modulus returned to decline position when higher frequency applied at 2 Hz, where the secant modulus is about 12.781 MPa and continues to decline with 3 Hz at 7.492 MPa. Doi: 10.28991/CEJ-2022-08-10-015 Full Text: PDF

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A Study on Linear Shrinkage Behavior of Peat Soil Stabilized with Eco-Processed Pozzolan (EPP)

Cited by 8 publications

References 22 publications

Peat Soil Compaction Characteristic and Physicochemical Changes Treated with Eco-Processed Pozzolan (EPP)

Peat Soil Compaction Characteristic and Physicochemical Changes Treated with Eco-Processed Pozzolan (EPP)

Effects of Salinity and pH Change Conditions on Organic Carbon Mineralization in Saline Alkali Land

Maximum Strain Effect and Secant Modulus Variation of Hemic Peat Soil at large Deformation due to Cyclic Loading

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