Table 1. Database sources Database...

Table 1.

Database sources

Database	Source publications	n	Notes
Vardanega & Haigh (2014)	Sherwood & Ryley (1970)	20	UK, African and Turkish soils (soils referred to as 8, 15, 19, 20 and 25 not included)^*
	Harison (1988)	7	Bandung clays (Indonesia)
	Feng (2000)	5	Taiwanese and Panamanian soils
	Zentar et al. (2009a)	3	Dunkirk sediments (tests F12 and F13 not included)^*
	Zentar et al. (2009b)	2	Dunkirk sediments (some tests not included)^*
	Kyambadde (2010)	52	Ugandan and UK soils (tests S32 and S34 not included as no thread rolling w_p values reported)
	Azadi & Monfared (2012)	2	Azerbaijani soils (only tests performed using British Standard fall-cone included)
	Haigh (2012)	3	UK soils
	Di Matteo (2012)	6	Italian (Paglia) alluvial soils
	Yin & Rui (2020)^†	1	West Nile Delta marine sediment (Egypt)
TCD database	Author files	15	Glacial tills, Kilbeggan clay and Monasterevin silt-interlaminated clay, Ireland
	O'Kelly (2005)^‡	5	Peats, marl, organic marl, Ireland
	O'Kelly (2006)^‡	4	Thinly laminated silt and clayey-silt from Waterford and fine fibrous peat, Ireland
	O'Kelly (2008)^‡	1	Residue from Ballymore Eustace water treatment plant (WTP), Ireland
	O'Kelly & Quille (2010)^‡	2	Residue from Leixlip and Clareville WTPs, Ireland
	O'Kelly (2013)^‡	1	Biosolids from Tullamore waste-water treatment plant, Ireland
	O'Kelly (2014a)	1	Residue from Ballymore Eustace WTP, Ireland
	O'Kelly (2014b)^‡	1	Residue from Ballymore Eustace WTP, Ireland
	O'Kelly & Sivakumar (2014)^‡	2	Clara and Derrybrien bog peats, Ireland
	O'Kelly (2015)^‡	5	Glacial till, Ireland
	Sivakumar et al. (2015)^‡	10	Canadian, Tennessee, Donegal, Belfast, Enniskillen, Ampthill, London and Oxford Clays, Belfast sleech and kaolin
Other publications	Campbell (1975)	24	Arable topsoils from south-east Scotland (data from both operators included in the analysis)
	Sampson & Netterberg (1985)	6	Southern African soils
	Vardanega et al. (2019)	16	Soils derived by removing fibres from peat materials sourced from southwest of England
	Sridharan et al. (1999)^§	41	Indian soils (FI_c reported but not the individual fall-cone readings)

Database	Source publications	n	Notes
Vardanega & Haigh (2014)	Sherwood & Ryley (1970)	20	UK, African and Turkish soils (soils referred to as 8, 15, 19, 20 and 25 not included)^*
	Harison (1988)	7	Bandung clays (Indonesia)
	Feng (2000)	5	Taiwanese and Panamanian soils
	Zentar et al. (2009a)	3	Dunkirk sediments (tests F12 and F13 not included)^*
	Zentar et al. (2009b)	2	Dunkirk sediments (some tests not included)^*
	Kyambadde (2010)	52	Ugandan and UK soils (tests S32 and S34 not included as no thread rolling w_p values reported)
	Azadi & Monfared (2012)	2	Azerbaijani soils (only tests performed using British Standard fall-cone included)
	Haigh (2012)	3	UK soils
	Di Matteo (2012)	6	Italian (Paglia) alluvial soils
	Yin & Rui (2020)^†	1	West Nile Delta marine sediment (Egypt)
TCD database	Author files	15	Glacial tills, Kilbeggan clay and Monasterevin silt-interlaminated clay, Ireland
	O'Kelly (2005)^‡	5	Peats, marl, organic marl, Ireland
	O'Kelly (2006)^‡	4	Thinly laminated silt and clayey-silt from Waterford and fine fibrous peat, Ireland
	O'Kelly (2008)^‡	1	Residue from Ballymore Eustace water treatment plant (WTP), Ireland
	O'Kelly & Quille (2010)^‡	2	Residue from Leixlip and Clareville WTPs, Ireland
	O'Kelly (2013)^‡	1	Biosolids from Tullamore waste-water treatment plant, Ireland
	O'Kelly (2014a)	1	Residue from Ballymore Eustace WTP, Ireland
	O'Kelly (2014b)^‡	1	Residue from Ballymore Eustace WTP, Ireland
	O'Kelly & Sivakumar (2014)^‡	2	Clara and Derrybrien bog peats, Ireland
	O'Kelly (2015)^‡	5	Glacial till, Ireland
	Sivakumar et al. (2015)^‡	10	Canadian, Tennessee, Donegal, Belfast, Enniskillen, Ampthill, London and Oxford Clays, Belfast sleech and kaolin
Other publications	Campbell (1975)	24	Arable topsoils from south-east Scotland (data from both operators included in the analysis)
	Sampson & Netterberg (1985)	6	Southern African soils
	Vardanega et al. (2019)	16	Soils derived by removing fibres from peat materials sourced from southwest of England
	Sridharan et al. (1999)^§	41	Indian soils (FI_c reported but not the individual fall-cone readings)

Due to lack of or insufficient fall-cone readings in the plastic range.

†

Originally cited in Vardanega & Haigh (2014) as ‘Yin (2012) personal communication’ as the paper had yet to be published.

‡

Fall-cone liquid limit values and other geotechnical properties reported in original papers, but not the raw fall-cone test data (raw data stored in the original author's files).

Sridharan et al. (1999) compared their database with data from Campbell (1975), Sampson & Netterberg (1985) and Sherwood & Ryley (1970), and they showed that the value of the coefficient in equation (4) did not change significantly.

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