The type of soil sample collected using wash boring technique is __________.

Types of sample:

Undisturbed sample:

• If the soil structure, moisture content & mineral content remains the same while sampling, the sample is called an undisturbed sample.
• It is used for tests on shear, consolidation, and permeability and can also be used for tests like a disturbed sample.
• Obtained by using sharp-edged thin wall tubes or cylinders.

Disturbed sample:

• These are used for mechanical analysis, water content determination, index properties, compaction, and stabilization test
• These are two types

a) Representative sample:

• If only soil structure gets modified and moisture content and mineral content remain the same while sampling, the sample is called a representative sample.
• Used for determining specific gravity and atterberg limits

b) Non-representative sample or zero representative:

• If all the 3 i.e. soil structure, mineral content, moisture content get modified by sampling, samples are known as non-representative samples.
• Obtained by wash boring and auger boring