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Hasan et al  

 

Full Length Research Paper


Determination of Consistency Limits of Different Agricultural Soils

 

1Mahedi Hasan, 2Abu Sayed*, 3M. A Hossain, 4Mosharaf Hossain, 5Mehedi Hashan Sohel

 

11Machinery Repair and Maintenance Division, Bangladesh Agricultural Research Institute, Joydebpur,Gazipur-1701.
2Department of Agricultural Engineering, EXIM Bank Agricultural University Bangladesh, Chapainawabgonj-6300.
3Workshop Machinery and Maintenance Division, Bangladesh Rice Research Institute, Joydebpur, Gazipur-1701.
4FMPE Division, Bangladesh Agricultural Research Institute, Joydebpur,Gazipur-1701.
5Department of Soil Science, EXIM Bank Agricultural University Bangladesh, Chapainawabgonj-6300.

 

Corresponding author email: abu_982@yahoo.com

Received October 17, 2016; Accepted October 26, 2016
ABSTRACT

 

This study was an attempt to determine the consistency limits (shrinkage, plastic and liquid) of soil. The experiment was conducted in four different classes, namely loam, silty loam, silty clay loam and silty clay. The plastic and liquid limits obtained by the Casagrande’s method were 22.10 and 26.30% for loam, 24.18 and 30.50% for silty loam, 25.01 and 38.50% for silty clay loam with 32.20 and 47.70% for silty clay soils, respectively. The drop cone-penetration plastic and liquid limits were 20.80 and 24.40% for loam, 22.00 and 27.40% for silty loam, 23.0 and 34.00% for silty clay loam, 28.10 and 42.80% for silty clay soils, respectively. The shrinkage limits for loam, silty loam, silty clay loam and silty clay soils were 16.52, 17.86, 20.39 and 24.76%, respectively. The test results reveal that the ratio of Casagrande’s to drop cone-penetrometer methods gives approximately 1.1. It can be suggested that cone-penetrometer test results of consistency limits multiplied by a factor of 1.1 would give the values as obtained by Casagrande’s method.

 

Keywords: Agricultural soil, Plastic limit, Liquid limit, Consistency Limit, Casagrande’s method and Shrinkage limit.

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