![]() Islam, Engineering properties of peat soils in Peninsular. Seth, The shrinkage behaviour of peat soil in Parit Nipah and Pontian (Final Year Project Faculty of Civil and Environmental Engineering, UTHM, Batu Pahat, 2013) Siddique, Effects of sampling disturbance and its minimization in reconstituted over-consolidated Dhaka clays. Clayton, Disturbances due to tube sampling in coastal soils. in Proceedings of the Institution of Civil Engineers, Geotechnical Engineering, vol. Siddique, Tube Sampling Disturbance-forgotten Truths and New Respective. Zainorabidin, Static and dynamic characteristics of peat with macro and micro structure perspective, PhD thesis, University of East London, 2010Ĭ.R.I. in Proceedings 7th Muskeg Research Conference (1961) pp. Brawner, The Compressibility of Peat with Reference to Major Highway Construction in British Columbia. Waikato Peat Management Council, For peat’s sake: good management practises for Waikato peat farmers, 2006Ī.O. This paper proposes a framework for screening and evaluating seismic performance of river earth embankments on liquefiable foundation soils. in Proceedings of the 4th International Conference on Unsaturated Soils, ASCE, vol. Stirk, Some aspects of soil shrinkage and the effect of cracking upon water entry into the soil. Haines, The volume-changes associated with variations of water content in soil. 44–48īS 1377:1990, Method of Testing Soils for Civil Engineering Purposes. in Proceedings of the 4th International Conference on Soil Mechanics and Foundation Engineering, vol. ![]() Heidema, The Bar-shrinkage Test and the Practical Importance of Bar-linear Shrinkage as an Identifier of Soils. McGraw-Hill Science and Technology Dictionary, Shrinkage Limit (2003) Emilia, Testing shrinkage factors: comparison of methods and correlation with index properties of soils, Bull. in Proceedings of 2nd International Conference on Advances in Soft Soil Engineering and Technology (2003), pp. Bakar, Engineering Properties of In-Situ and Modified Hemic Peat Soil in Western Johor, ed. Alwi, Engineering properties of stabilized tropical peat soil. The shrinkage measurements during the drying process influenced the volume of peat soils as the volume decreases when the soil is shrunk. Sieve process will disrupt the composition of actual peat soil because it will remove any decomposed plants. Linear measurement for modified method that using undisturbed sample is extremely different and higher than British standard method which is using reconstituted soil sample that had been sieve passing 425 μm. Linear shrinkage of undisturbed peat soil is observed every hour until there are no volume changes. Peat samples were collected from Parit Nipah (PPN) and Pontian (PP). The aim of the study is to evaluate the shrinkage measurement of peat soils with modified techniques to compare with the British Standard method. For peat soil condition, shrinkage effect is one of the factors that can affect the strength and moisture content of soils. It will give rise to an extreme of challenging ground conditions and peat soils also are known as a very problematic soft soil. Since the changes in the D s/ D 0 ratios with the a values of a well-decomposed black peat soil tended to be more remarkable than those of other high-moor peat soils, the existence of a positive feedback mechanism was assumed, such that peat soil decomposition itself would increase the soil gas diffusivity and promote soil respiration.Peat soils occur in many countries and naturally formed by the decomposition of plant matter. The TPM, a predictive model for undisturbed mineral soils, overestimated the D s/ D 0 values for peat soils, implying that in the peat soils the pore pathways were more tortuous than those in the mineral soils. The MQ model reproduced the measured D s/ D 0 curves better than the TPM. Undisturbed peat soil cores were sampled from aerobic layers in the Bibai mire, Hokkaido, Japan. 2004) and the Millington-Quirk model (1961) for predicting the relative gas diffusivity, the ratio of D s to D 0, the gas diffusion coefficient in free air. In the present study, we aimed at determining the D s of peat soils for various values of the air-filled porosity a and we tested the validity of the Three-Porosity Model (Moldrup et al. Determination of the gas diffusion coefficient D s of peat soils is essential to understand the mechanisms of soil gas transport in peatlands, which have been one of major potential sources of gaseous carbons.
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