Advances in Civil Engineering / 2019 / Article / Tab 4

Research Article

Quantifying Repeatability Reproducibility Sources of Error and Capacity of a Measurement: Demonstrated Using Laboratory Soil Plasticity Tests

Table 4

Correlations between the Casagrande cup and fall cone liquid limit test results.

ReferenceMaterialLL range (%)Number of specimensCorrelations

Sherwood and Ryley [17]Various clays30–7625LLcone = 0.95 LLcup + 0.95
Belviso et al. [21]Natural soils, Southern Italy34–13416LLcone = 0.97 LLcup + 1.19
Wasti and Bezirci [22]Turkey natural soils27–11015LLcone = 1.01 LLcup + 4.92
Dragoni et al. [24]Clayey soils, Central Italy28–7441LLcone = 1.02 LLcup + 2.87
Özer [25]Natural soils, Turkey29–10432LLcone = 0.90 LLcup + 6.04
Fojtová et al. [23]Ostrava Basin clay, Czek Republic20–5052LLcone = 1.00 LLcup + 2.44
Di Matteo [15]Database of various soils24–50>50LLcone = 1.00 LLcup + 2.20
Spagnoli [20]Kaolinite and illitic clay20–6150LLcone = 0.99 LLcup + 1.05
Present studyCrushed limestone material plus bentonite20–4545LLcone = 0.85 LLcup + 5.51

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