Provide PDF Format
AASHTO T 90-14
- Standard Method of Test for Determining the Plastic Limit and Plasticity Index of Soils
- standard by American Association of State and Highway Transportation Officials, 2014
- Publisher: AASHTO
$30.00$60.00
The plastic limit of a soil is the lowest water content determined in accordance with this procedure at which the soil remains plastic. The plasticity index of a soil is the range in water content, expressed as a percentage of the mass of the oven-dried soil, within which the material is in a plastic state. It is the numerical difference between the liquid limit and plastic limit of the soil.
The following applies to all specified limits in this standard: For the purpose of determining conformance with these specifications, an observed value or a calculated value shall be rounded off to the nearest unit in the last right-hand place of figures used in expressing the limiting value, in accordance with ASTM E 29.
Two procedures for rolling out soil samples are provided in this method: the Hand Rolling Method and the Plastic Limit Device Method. The Hand Rolling Method shall be the referee procedure.
The following applies to all specified limits in this standard: For the purpose of determining conformance with these specifications, an observed value or a calculated value shall be rounded off to the nearest unit in the last right-hand place of figures used in expressing the limiting value, in accordance with ASTM E 29.
Two procedures for rolling out soil samples are provided in this method: the Hand Rolling Method and the Plastic Limit Device Method. The Hand Rolling Method shall be the referee procedure.
Related Products
AASHTO M 175M/M 175-05 (2013)
Standard Specification for Perforated Concrete Pipe (ASTM C444M-03 and C444-03)..
$22.00 $44.00
AASHTO R 5-08
Standard Recommended Practice for Selection and Use of Emulsified Asphalts..
$6.00 $12.00
AASHTO M 307-05
Standard Specification for Silica Fume Used in Cementitious Mixtures..
$25.00 $50.00