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ISO DIS 17892-12

2016 Edition, December 30, 2016

Complete Document

Geotechnical investigation and testing - Laboratory testing of soil - Part 12: Determination of liquid and plastic tests

Includes all amendments and changes through Draft , December 30, 2016

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Description / Abstract:

This International Standard specifies methods for the determination of the liquid and plastic limits of a remoulded soil. These comprise two of the Atterberg limits for soils.

The liquid limit is the water content at which a soil changes from the liquid to the plastic state.

This document describes the determination of the liquid limit of a specimen of natural soil, or of a specimen of soil from which material retained on a 0,4 mm or nearest sieve has been removed. This document describes two methods: the fall cone method and the Casagrande method.

NOTE The fall cone method in this Standard should not be confused with that of ISO 17892-6. The plastic limit of a soil is the water content at which a soil ceases to be plastic when dried further.

The determination of the plastic limit is normally made in conjunction with the determination of the liquid limit. It is recognised that the results of the test are subject to the judgement of the operator, and that some variability in results will occur.
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