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The soil was tested in a National research center and its liquid limit was found to be 15% and the plasticity index was found to be 3%. According to Cassagrande's plasticity chart, which soil type is this?
- a)ML
- b)Cl
- c)CL
- d)MH
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
The soil was tested in a National research center and its liquid limit...
**Explanation:**
The liquid limit (LL) and plasticity index (PI) of a soil are determined through laboratory tests and can be used to classify the soil type according to Cassagrande's plasticity chart.
1. **Liquid Limit (LL):** The liquid limit is the moisture content at which a soil transitions from a liquid state to a plastic state. It represents the upper limit of the soil's plasticity.
2. **Plasticity Index (PI):** The plasticity index is the numerical difference between the liquid limit and the plastic limit (PL) of a soil. It represents the range of moisture content within which the soil remains plastic.
Now let's determine the soil type based on the given liquid limit and plasticity index:
- Liquid Limit (LL) = 15%
- Plasticity Index (PI) = 3%
According to Cassagrande's plasticity chart, the soil type can be determined as follows:
1. **Find the Liquid Limit** (15%) on the vertical axis of the chart.
2. **Find the Plasticity Index** (3%) on the horizontal axis of the chart.
3. The intersection of the LL and PI values on the chart falls in the **ML** (Silty) soil region.
Hence, the correct answer is option **A) ML**.
**Conclusion:**
The soil with a liquid limit of 15% and a plasticity index of 3% is classified as **ML** (Silty) soil according to Cassagrande's plasticity chart.
The liquid limit (LL) and plasticity index (PI) of a soil are determined through laboratory tests and can be used to classify the soil type according to Cassagrande's plasticity chart.
1. **Liquid Limit (LL):** The liquid limit is the moisture content at which a soil transitions from a liquid state to a plastic state. It represents the upper limit of the soil's plasticity.
2. **Plasticity Index (PI):** The plasticity index is the numerical difference between the liquid limit and the plastic limit (PL) of a soil. It represents the range of moisture content within which the soil remains plastic.
Now let's determine the soil type based on the given liquid limit and plasticity index:
- Liquid Limit (LL) = 15%
- Plasticity Index (PI) = 3%
According to Cassagrande's plasticity chart, the soil type can be determined as follows:
1. **Find the Liquid Limit** (15%) on the vertical axis of the chart.
2. **Find the Plasticity Index** (3%) on the horizontal axis of the chart.
3. The intersection of the LL and PI values on the chart falls in the **ML** (Silty) soil region.
Hence, the correct answer is option **A) ML**.
**Conclusion:**
The soil with a liquid limit of 15% and a plasticity index of 3% is classified as **ML** (Silty) soil according to Cassagrande's plasticity chart.
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Community Answer
The soil was tested in a National research center and its liquid limit...
Fine grained soil are classified on the basis of plastic chart. Clay is found to exist above A-line whereas silt & organic soil found to exist below A-line.
Soil type:
Liquid limit = WL = 15 %, Plasticity index = IP = 3
IP according to the plasticity chart = 0.73(15 - 20) = - 3.65
And we know IP cannot be negative, and when it comes out negative, we report it as 0
So, according to plasticity chart, IP = 0
Firstly,
The actual plasticity limit is 3, so the soil will lie in the region above A-Line
Secondly,
By plotting the plasticity index (3) and liquid limit (15 %), in the graph, we get the region of the given soil in the graph above
So, the soil is in the region marked as ML in the graph
Soil type:
Liquid limit = WL = 15 %, Plasticity index = IP = 3
IP according to the plasticity chart = 0.73(15 - 20) = - 3.65
And we know IP cannot be negative, and when it comes out negative, we report it as 0
So, according to plasticity chart, IP = 0
Firstly,
The actual plasticity limit is 3, so the soil will lie in the region above A-Line
Secondly,
By plotting the plasticity index (3) and liquid limit (15 %), in the graph, we get the region of the given soil in the graph above
So, the soil is in the region marked as ML in the graph
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The soil was tested in a National research center and its liquid limit was found to be 15% and the plasticity index was found to be 3%. According to Cassagrandes plasticity chart, which soil type is this?a)MLb)Clc)CLd)MHCorrect answer is option 'A'. Can you explain this answer?
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