Compressibility of lightweight cemented clays

Horpibulsuk, Suksun; Rachan, Runglawan; Suddeepong, Apichat; Liu, Martin D.; Du, Yan-Jun

doi:10.1016/j.enggeo.2013.03.020

Cited by 39 publications

(10 citation statements)

References 35 publications

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“…The e R is the void ratio supported by the intrinsic soil structure and dependent upon the clay mineral and the pore fluids, while e s is the additional void ratio attributed to the ageing effect (stress history and cementation). Carter (1999, 2000), Horpibulsuk et al (2007Horpibulsuk et al ( , 2010Horpibulsuk et al ( , 2013 and Suebsuk et al (2010Suebsuk et al ( , 2011 have analysed the compression behaviour of natural and artificially structured clays and have found that the additional void ratio due to the ageing effect, e s , at the post-yield state is proportional to σ y =ðσ 0 v Þ b , where σ y is the yield stress and b is the destructuring index, quantifying the rate of destructuring. The greater ageing effect results in the higher σ y .…”

Section: Modelling Of Compression Curve Of Singapore Claymentioning

confidence: 99%

Mineralogy and geotechnical properties of Singapore marine clay at Changi

Bo¹,

Arulrajah

Sukmak

et al. 2015

Soils and Foundations

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An engineering geological study was undertaken to determine the geotechnical properties and mineralogy of Singapore marine clay at Changi in the Republic of Singapore. This soft soil is a quartenary deposit that lies within submarine valleys cut in an old alluvium formation. The marine clay comprises a soft upper marine clay layer overlying a stiffer lower marine clay layer. An intermediate stiff clay layer is sandwiched between these two marine clay layers; it is believed to be the dessicated crust of the lower marine clay layer. In the present study, morphological and mineralogical observations of Singapore clay were taken by scanning electron microscopy, X-ray diffraction and photographic identification. The geotechnical investigation included physical, compression, permeability and field vane shear tests. The upper marine clay was found to be soft with undrained shear strength values ranging from 10 to 30 kPa, while the lower marine clay was found to have undrained shear strength values from 30 to 60 kPa. The sensitivity of the marine clay at Changi varied from 3 to 8 and is described as highly sensitive marine clay. The upper clay layer had a coefficient of consolidation of 0.47-0.6 m 2 /year due to the vertical flow (c v ) and a coefficient of consolidation of 2-3 m 2 /year due to the horizontal flow (c h ). The lower marine clay had a c v of 0.8-1.5 m 2 /year and a c h of 3-5 m 2 /year, while the intermediate stiff clay had a c v of 1-4.5 m 2 /year and a c h of 5-10 m 2 /year. The primary clay mineral was kaolinite, followed by smectite and mica. With this high kaolinite content, the activity of the Singapore marine clay was found to be low at approximately 0.5-1.3 and classified as inactive to active clay. With reference to the intrinsic state line, natural Singapore clay (upper, intermediate and lower layers) has been classified as structured clay and is in a meta-stable state. The compression behaviour can be modelled by the Intrinsic State Line and the destructuring framework. The predicted and the measured compression curves were comparable for various depths. The successful modelling of compression curves will be useful for settlement calculations and for further research on the development of a constitutive model for Singapore marine clay.

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Section: Modelling Of Compression Curve Of Singapore Claymentioning

confidence: 99%

Mineralogy and geotechnical properties of Singapore marine clay at Changi

Bo¹,

Arulrajah

Sukmak

et al. 2015

Soils and Foundations

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“…Recently, Horpibulsuk et al (2012aHorpibulsuk et al ( , 2013Horpibulsuk et al ( and 2014b and Neramitkornburi et al (2015a,b, accepted for publication) have investigated unit weight, UCS, compressibility and durability against wetting and drying characteristics of LCC Bangkok clay, kaolin and bentonite at various water contents, cement contents, air contents and curing times. They have illustrated that the addition of air content is not always positive; i.e., at low water content, the clay viscosity is high and prevents the air bubble entry into the pore space, resulting in insignificant reduction in unit weight even with the increase in air content.…”

Section: Introductionmentioning

confidence: 98%

Mix design charts for lightweight cellular cemented Bangkok clay

Teerawattanasuk

Voottipruex

Horpibulsuk

2015

Applied Clay Science

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“…As lightweight concrete is now increasingly used in medium and high-rise buildings worldwide including Thailand, the development of sustainable lightweight construction material using WTS as an aggregate is the focus of this paper. Natural soil has been successfully used as an aggregate to develop a lightweight cellular material using Portland cement as a cementing agent [37][38][39][40][41]. The development of lightweight cellular material using WTS as an aggregate and geopolymer as a cementing agent has however not been previously investigated.…”

Section: Introductionmentioning

confidence: 99%