A high liquid limit normally indicates a high compressibility and a high shrinkage/swelling potential. A high-plasticity index Ip generally results in a low shear strength. A low Ip means that a soil used as foundation will change significantly in consistency even with a small change in water content..
Also, what does a high plastic limit mean?
Answered Nov 20, 2018. Plastic limit : The water content at which soil sample change from plastic state to semi-solid state. (i.e. soil loses its plasticity & behave like a brittle material). or. Plastic limit is the water content in clay soil below Which it stop to behave like a plastic material.
Also Know, why is liquid limit important? Value of liquid limit is used to classify fine grained soil. It gives us information regarding the state of consistency of soil on site. Liquid limit of soil can be used to predict the consolidation properties of soil while calculating allowable bearing capacity & settlement of foundation.
can the liquid limit of a soil be greater than 100?
soils moisture content can range from 0 to 300 percent. Water contain can't be greater than 100% cause it's impossible to get obtain marks greater than the total marks.
What is the liquid limit test?
The liquid limit test is defined by ASTM standard test method D 4318. The test method also allows running the test at one moisture content where 20 to 30 blows are required to close the groove; then a correction factor is applied to obtain the liquid limit from the moisture content.
Related Question Answers
What is a good plasticity index?
A high PI indicates an excess of clay or colloids in the soil. Its value is zero whenever the PL is greater or equal to the LL. The plasticity index also gives a good indication of compressibility (see Section 10.3). The greater the PI, the greater the soil compressibility.Why is there 25 blows in liquid limit?
Theory: The liquid limit is the moisture content at which the groove formed by a standard tool into the sample of soil taken in the standard cup, closes for 12 mm on being given 25 blows in a standard manner. At this limit, the soil possess low shear strength.How do you find the liquid limit?
Calculate the liquid limit from only one soil sample test by dividing the number of blows by 25, raising the result to the power of 0.121 and multiplying by the percent water content.What is Atterberg limit test?
Atterberg limits is a basic measure of the critical water content of fine-grained soils. These tests include shrinkage limit, plastic limit, and liquid limit, which are outlined in ASTM D4318. Depending on the water content of a soil, it may appear in four states: solid, semi-solid, plastic and liquid.What does the plastic limit tell you?
Plastic Limit is the water content at the change from a plastic to a semisolid state. This test attempts to deform a soil specimen below the moisture by rolling it into a thread, resulting in the soil crumbling.How is plasticity limit calculated?
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.Why are Atterberg limits important?
This is very important when trying to build with or build on these type of materials. The two commonly determined Atterberg Limits represent the moisture contents at which a specific soil's behavior changes from solid to plastic (Plastic Limit) and from plastic to liquid (Liquid Limit).What is meant by liquid limit?
The liquid limit is the moisture content at which the groove, formed by a standard tool into the sample of soil taken in the standard cup, closes for 10 mm on being given 25 blows in a standard manner. This is the limiting moisture content at which the cohesive soil passes from liquid state to plastic state.Is it possible for a particular soil to obtain a moisture content of more than 100 by weight?
Is it possible for a particular soil to obtain a moisture content of more than 100% by weight? Yes. Remember, the moisture content is the mass of water compared to the mass of solids, not the total mass. Highly organic soils also frequently have moisture contents higher than 100 percent also.What is the plastic limit of soil?
The plastic limit of a soil is the moisture content at which soil begins to behave as a plastic material. At this water content (plastic limit), the soil will crumble when rolled into threads of 3.2mm(1/8in) in diameter.What is liquid limit in soil mechanics?
Liquid Limit Definition The moisture content at which any increase in the moisture content will cause a plastic soil to behave as a liquid. The limit is defined as the moisture content, in percent, required to close a distance of 0.5 inches along the bottom of a groove after 25 blows in a liquid limit device.What is shrinkage limit of soil?
The shrinkage limit of soil is the water content of the soil when the water is just sufficient to fill all the pores of the soil and the soil is just saturated. The volume of the soil does not decrease when the water content is reduced below the shrinkage limit.Can void ratio be more than 1?
e=1/(1-p) where p= porosity =(void space,liquid & gas)/(Total volume including solid), so p cannot be more than 1 since total void cannot be more than total volume. so e, the void ration, may be more than one.What is soil liquidity index?
The liquidity index (LI) is used for scaling the natural water content of a soil sample to the limits. It can be calculated as a ratio of difference between natural water content, plastic limit, and liquid limit: LI=(W-PL)/(LL-PL) where W is the natural water content.What is plastic state of soil?
Plastic state is defined as the state of soil, where it can be workable enough to be molded. The corresponding moisture content for a fine grained soil at the plastic state is to be measured. The consistency of the soil sample remains uniform.What does the liquid limit tell you about the relationship between clay minerals and water?
What does the liquid limit tell you about the relationship between clay minerals and The liquid limit indicates how much water can be absorbed by the fine classified soil and impacts the behavior of fine grained soils. The solids and liquid do not compress because they are incompressible.What is the use of plasticity index?
The difference between liquid and plastic limits is called the plasticity index, and it represents the range of water content over which the soil is plastic. The plasticity index, in combination with water content at liquid limit (wL), indicates how sensitive the soil is to the changes in moisture content.Why do we use plastic limit and liquid limit?
The liquid limit (LL) It is defined as the percentage moisture content at which a soil changes with decreasing wetness from liquid to plastic consistency or with increasing wetness from plastic to liquid consistency. It is the water content at which a soil changes from plastic to liquid behavior.What do you mean by optimum moisture content?
Definition of optimum moisture content. The water content at which a soil can be compacted to the maximum dry unit weight by a given compactive effort. Also called optimum water content. 
