Can liquid limit be more than 100\%?
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Can liquid limit be more than 100\%?
Most clay has a liquid limit of the order of 50\%–90\%; however it can exceed 100\%. Consistency in fine-grained soils means the properties of friability, stickiness, plasticity, and resistance to deformation.
What is considered a high liquid limit?
9.2. 1 Consistency and Plasticity
| Soil | Liquid limit wL (\%) | Plastic limit wp (\%) |
|---|---|---|
| Silt, medium plasticity | 35–50 | 22–23 |
| Clay, low plasticity | 25–35 | 15–22 |
| Clay, medium plasticity | 40–50 | 18–25 |
| Clay, high plasticity | 60–85 | 20–35 |
Can the plastic limit be greater than liquid limit?
Mathematically defined as, Plasticity Index = Liquid Limit – Plastic Limit. This parameter cannot be negative if plastic limit, in some exceptions, is larger than the liquid limit, it is considered to be zero and soil is considered non-plastic.
How is liquid limit calculated?
Liquid Limit is measured by spreading a portion of the soil sample in the brass cup of a liquid limit machine and dividing it using a grooving tool. The moisture content when the groove closes for 1/2in after 25 drops of the cup is defined as the Liquid Limit.
How do you find the plastic limit and liquid limit?
Record the difference between the wet and dry weights as the weight of moisture. Calculate the plastic limit wp by dividing the “weight of moisture” by the “dry weight of sample” and multiply by 100. Plasticity Index (Ip) of a soil is the numerical difference between its Liquid Limit and its Plastic Limit.
What is shrinkage limit?
The shrinkage limit of cohesive soils is defined as the water content at which further loss of moisture will not cause a decrease in volume. A soil specimen with moisture content above the liquid limit is placed in the shrinkage dish and struck off with the straightedge.
Which of the following increases with the increase of liquid limit?
Detailed Solution. So, If the liquid limit is increased then, the compression index of soil will increase.
What does a high plastic limit mean?
In general, the plasticity index depends only on the amount of clay present. It indicates the fineness of the soil and its capacity to change shape without altering its volume. A high PI indicates an excess of clay or colloids in the soil.
What is the difference between liquid limit and plastic limit?
The Liquid Limit (LL) is the moisture content at which a fine-grained soil no longer flows like a liquid. The Plastic Limit (PL) is the moisture content at which a fine-grained soil can no longer be remolded without cracking.
Why liquid limit test is done?
Liquid limit of soil can be used to predict the consolidation properties of soil while calculating allowable bearing capacity & settlement of foundation. Liquid limit value of soil is also used to calculate activity of clays and toughness index of soil.
Is liquid limit a percentage?
2.1 The liquid limit of a soil is the moisture content, expressed as a percentage of the weight of the oven-dried soil, at the boundary between the liquid and plastic states of consistency.