Lime Stabilized Malaysian Cohesive Soils

Khairul Anuar Kassim, and Kok, Kai Chern, (2004) Lime Stabilized Malaysian Cohesive Soils. Malaysian Journal of Civil Engineering, 16 (1). pp. 13-23.

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Affiliations

Universiti Technologi Malaysia, Faculty of Civil Engineering.
Universiti Technologi Malaysia, Faculty of Civil Engineering.

Abstract

This paper highlights the essential tests for assessing the suitability of lime for stabilizing soils and typical changes in soil characteristics due to modification and stabilization processes with respect to mineralogical influences. The reasoning behind the mechanism of lime clay reaction on the compressive strength development of stabilized soils has been established. Clay with acidic origin exhibit less significant increase in compressive strength compared to clay with high intensity of kaolinite and with alkaline origin. In general, lime contents instituted, ranging from 3% to 6%, have contributed to a significant increase in unconfined compressive strength, from 2.5 to 11 times of the untreated soils. The formation of calcium aluminates silicate hydrate (CASH) observed from XRD test, after 14 days, indicates the early formation of new product, due to lime-soil reaction. The effectiveness of stabilization process has been found to be dependent on the quality of the lime, clay fraction, mineralogy and the alkalinity of the soil.

Kertas kerja ini menumpukan kepada beberapa ujian utama bagi menilai kesesuian bahan kapur untuk menstabilkan tanah dan melihat kepada perubahan dalam ciri-ciri tanah terstabil hasil daripada proses pengubahsuaian dan penstabilan dengan pengaruh minerologi. Punca disebalik mekanisma tindakbalas antara kapur dan tanah liat keatas perkembangan dalam kekuatan mampatan tanah terstabil telah dikenalpasti. Tanah liat yang berasal dari keadaan berasid kurang menunjukkan peningkatan dalam kekuatan mampatan berbanding dengan tanah liat yang mempunyai intensiti kaolinit yang tinggi dan berkeadaan alkali. Secara amnya julat kandungan kapur yang digunakan adalah antara 3% ke 6%, telah menunjukkan pertambahan kekuatan mampatan tak terkurung dari 2.5 ke 11 kali ganda berbanding tanah tak terstabil. Pembentukan kalsium aluminat silikat terhidrat (CASH) daripada ujian XRD, selepas 14 hari, menunjukkan tanda pembentukan awal bahan baru dalam tindakbalas tanah dan kapur. Keberkesanan proses penstabilan kapur didapati bergantung kepada kualiti kapur, kandungan tanah liat, minerologi dan alkaliniti tanah.

Item Type:

Journal

Keywords:

Lime; Stabilization; Modification; Cementation; Mineralogy Kapur; Penstabilan; Pengubahsuaian; Pengikatan; Minerologi

Subjects:

T Technology, Engineering

ID Code:

6515