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Standard Method of Test for Determining the Plastic Limit and Plasticity Index of Soils

AASHTO T 90

Organization:
AASHTO - American Association of State Highway and Transportation Officials
Year: 2020

Abstract: The plastic limit of a soil is the lowest moisture content at which the soil remains plastic. The plasticity index of a soil is the range in moisture content, expressed as a percentage of the mass of the oven-dried soil, within which the material is in a plastic state. The plasticity index is calculated as 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 E29. 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 used as the referee procedure. This test method is often conducted in conjunction with T 89, which is used to determine the liquid limit of soils.
URI: https://lib.yabesh.ir/std/handle/yse/281308
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    Standard Method of Test for Determining the Plastic Limit and Plasticity Index of Soils

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contributor authorAASHTO - American Association of State Highway and Transportation Officials
date accessioned2020-09-04T09:07:46Z
date available2020-09-04T09:07:46Z
date copyright2020
date issued2020
identifier otherUKCBOGAAAAAAAAAA.pdf
identifier urihttps://lib.yabesh.ir/std/handle/yse/281308
description abstractThe plastic limit of a soil is the lowest moisture content at which the soil remains plastic. The plasticity index of a soil is the range in moisture content, expressed as a percentage of the mass of the oven-dried soil, within which the material is in a plastic state. The plasticity index is calculated as 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 E29. 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 used as the referee procedure. This test method is often conducted in conjunction with T 89, which is used to determine the liquid limit of soils.
languageEnglish
titleStandard Method of Test for Determining the Plastic Limit and Plasticity Index of Soilsen
titleAASHTO T 90num
typestandard
page6
statusActive
treeAASHTO - American Association of State Highway and Transportation Officials:;2020
contenttypefulltext
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