Sains Malaysiana 46(1)(2017): 97–106
http://dx.doi.org/10.17576/jsm-2017-4601-13
Compressibility Characteristics of Compacted
Clay Treated withCement,
Peat Ash and Silica Sand
(Ciri Kebolehmampatan Tanah Liat Terpadat
Dirawat dengan Simen, Abu Gambut dan Pasir Silika)
SEYEDESMAEIL MOUSAVI*
& LEONG SING WONG
Department of Civil
Engineering, College of Engineering, Universiti Tenaga Nasional, IKRAM-UNITEN Road, 43000 Kajang, Selangor Darul Ehsan, Malaysia
Diserahkan: 7 Ogos 2015/Diterima:
22 April 2016
ABSTRACT
This paper investigates the
compressibility characteristics of compacted clay treated with cement, peat ash
and silica sand. For this purpose, one dimensional consolidation tests were
conducted to determine the soil consolidation properties. The test specimens
were trimmed from the compaction test specimen. The 1D consolidation test
specimen was subjected to the normal pressures of 2.5, 5, 10, 20, 40, 80 and
160 kPa in sequence on the test specimen which was saturated with distilled
water. At the end of the loading period of 80 kPa, the vertical load was
removed and the specimen was allowed to expand for 24 h for the purpose of
evaluating of its swelling behavior. The results showed that void ratio of the
soil specimens decreased with increasing effective normal pressure. The
laboratory investigation clearly demonstrates that, settlement is as the
compression of a soil specimen due to vertical loading applied at the top
surface of the 1D consolidation test specimen. It was concluded that, the
compression settlement of the stabilized soil with the binder composition of
18% cement, 2% peat ash and 5% silica sand improved by almost 1.3-fold. A
notable discovery is the suitability of the stabilized soil for road embankment
and low lying marginal area for foundation works; also solving the
environmental problems in relation to peaty ground. However, sufficient
laboratory and field testing are required.
Keywords: Compressibility; road
embankment; soft clay; 1D consolidation
ABSTRAK
Kertas ini
mengkaji ciri kebolehmampatan tanah liat terpadat yang dirawat dengan simen,
abu gambut dan pasir silika. Bagi tujuan ini,
satu ujian penyatuan dimensi telah dijalankan untuk menentukan sifat
konsolidasi tanah. Spesimen ujian telah dipotong
daripada spesimen ujian pemadatan. Spesimen ujian konsolidasi 1D adalah
tertakluk kepada tekanan normal 2.5, 5, 10, 20, 40, 80 dan 160 kPa dalam
turutan ujian spesimen yang telah ditepu dengan air suling. Pada akhir tempoh
pemuatan 80 kPa, beban menegak telah dihapuskan dan spesimen itu dibiarkan
untuk berkembang selama 24 jam bagi tujuan menilai tingkah laku pembengkakan. Hasil kajian menunjukkan bahawa nisbah batal bagi spesimen tanah
menurun dengan peningkatan tekanan normal yang berkesan. Kajian makmal dengan jelas menunjukkan bahawa penyelesaian adalah
seperti pemampatan spesimen tanah yang disebabkan oleh beban menegak yang
diguna pakai di atas permukaan spesimen ujian pengukuhan 1D. Ia
menunjukkan bahawa penyelesaian mampatan tanah stabil dengan komposisi pengikat
18% simen, 2% abu gambut dan 5% pasir silika meningkat sebanyak hampir
1.3-lipatan. Satu penemuan yang ketara ialah kesesuaian tanah
stabil bagi tambak jalan dan kawasan marginal rendah untuk kerja-kerja asas;
juga menyelesaikan masalah alam sekitar berkaitan tanah gambut. Walau bagaimanapun, ujian makmal dan lapangan adalah perlu.
Kata
kunci: Kebolehmampatan; konsolidasi 1D; tambak jalan; tanah liat lembut
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*Pengarang untuk surat-menyurat; email: mousavi@khiau.ac.ir
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