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Density and permeability properties of over compacted sands and laterites

Density and permeability properties of over compacted sands and laterites / Ng Chun Hua
Pemadatan tanah yang betul adalah penting dalam mana-mana jenis projek pembinaan. Ia sangat penting kerana ia menyediakan platform yang diperlukan untuk memberi sokongan penting bagi bangunan, pelbagai substruktur pembinaan, tapak pelupusan dan struktur pembinaan lain. Oleh itu, pemadatan tanah perlu dilakukan dengan secukupi dan praktikal dengan memperhatikan terhadap aspek parameter tanah yang dikehendaki, namun mengambil perhatian terhadap masa dan kos keseluruhan proses pemadatan. Disertasi ini memperkenalkan hubungan antara 3 parameter utama, iaitu ketumpatan kering yang diperoleh, pekali kebolehtelapan dikurangkan dan tenaga pemadatan digunakan untuk tanah. Laterit tanah dan pasir sungai adalah dua bahan tanah yang paling biasa terdapat dalam bidang pembinaan telah dipilih sebagai sampel tanah untuk kajian penyelidikan ini. Sampel tanah telah menjalani ujian permeabilitas dan pemadatan proctor dengan tahap pemadatan yang berbeza untuk mendapatkan data yang mencukupi untuk analisis dan penafsiran hubungan antara 3 parameter utama. Ujian pemadatan Proctor dijalankan pada awalnya kerana keputusan datanya diperlukan untuk digunakan sebagai pembolehubah malar dalam ujian kebolehtelapan kemudian Keputusan menunjukkan bahawa tanah laterit mempunyai sensitiviti yang lebih besar terhadap perubahan daya pemadatan dari segi ketumpatan kering dan pekali kebolehtelapan yang terjejas. Walaupun tanah laterit mempunyai pekali kebolehtelapan yang lebih rendah berbanding dengan pasir sungai, tetapi kedua-dua sampel tanah masih berjauhan dari sifat-sifat kebolehtelapan yang diperlukan untuk tujuan tapak pelupusan. Daya pemadatan optimum untuk kepadatan kering dan tujuan kebolehtelapan adalah berbeza dan juga ia berbeza dengan jenis sampel tanah. Akhir sekali, pendapatan dari kajian ini memberikan maklumat berguna untuk jurutera untuk menganggarkan daya pemadatan yang sesuai yang diperlukan untuk projek pembinaannya. iv _______________________________________________________________________________________________________ Proper soil compaction is essential in any type of construction project. It is very important because it provides the necessary platform that will sustain the crucial support for the buildings, various construction foundations, landfills, and any other construction structures. Therefore, soil compaction have to be applied sufficiently and practically with the concern to the aspect of the desired soil parameters, yet taking consideration to the time and cost of the entire compaction process. This dissertation presents the relationship between the 3 major parameters, which are the dry density gained, the permeability coefficient reduced and the compaction energy applied to the soil. Laterite soil and river sand are the two of the most abundant soil materials present in construction field were chosen as the soil sample for this research study. The soil samples have undergone permeability and proctor compaction tests with different level of compaction energy to acquire sufficient data for the analysis and interpretation of the relationship between the 3 major parameters. Proctor compaction tests were conducted at first as the results of the data are required to use as the constant variables in the permeability test later. The results show that the laterite soil have greater sensitive to the change of compaction energy in term of the dry density and permeability coefficient that are affected. Besides that, laterite soil shows properties with higher maximum dry density and lower permeability coefficient obtained from the same compaction energy with the river sand. However, although the laterite soil show lower permeability coefficient as compared to the river sand, both of the soil samples are still far beyond from the impervious permeability properties that are required for landfill purpose. The optimum compaction energy for dry density and permeability purpose are different and it varies with type of soil sample. Last but not least, the findings from this research provides useful information for the engineer to estimate the suitable compaction energy that are required for their construction project.
Contributor(s):
Ng Chun Hua - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875007615
Language:
English
Subject Keywords:
soil compaction; construction; landfills
First presented to the public:
6/1/2018
Original Publication Date:
8/3/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Civil Engineering
Citation:
Extents:
Number of Pages - 84
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-08-03 15:55:37.919
Date Last Updated
2020-05-20 23:23:26.208
Submitter:
Mohd Jasnizam Mohd Salleh

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