What do Atterberg Limits tell us?

What do Atterberg Limits tell us?

Atterberg limits tests establish the moisture contents at which fine-grained clay and silt soils transition between solid, semi-solid, plastic, and liquid states.

How are Atterberg limits related to soil composition?

Atterberg Limits are the water contents which define transitions between the solid, plastic, and liquid states of a given soil material. The tests are restricted to cohesive soils with appreciable silt or clay fraction, and cannot be conducted readily on either sands or silts with a high sand fraction.

Can all soils have water content more than 100% or is it only possible for plastic soils?

It is possible only the soil must be in the form of mud or slurry. Hence, the moisture content may be greater than 100%.

What is liquid limit plastic limit and shrinkage limit?

There are three important Atterberg limits: shrinkage limit (SL), plastic limit (PL), and liquid limit (LL). The shrinkage limit is the water content at which the volume of the soil starts to increase. It is also at the point where the soil is 100% saturated.

How do you calculate soil flow index?

It is denoted as IF. Slope of this curve can be calculated by taking any two water contents w1 and w2 and their corresponding number of blows N1 and N2. Now using this right angle triangle we can determine the tan theta and that will be the slope of this curve which is the flow index of the soil.

What is flow curve in soil mechanics?

Liquid Limit Atterberg Limits & Consistency indices This line is referred to as the flow curve. The moisture content corresponding to N 25, determined from the flow curve, gives the liquid limit of the soil.

Why flow curve is used?

A flow curve is a graphical representation of how the shear viscosity of a sample changes when it is subjected to different shear rates or shear stresses.

What is remoulding of soil?

Soil that has had its natural structure modified by manipulation. Ref: ASCE. Prev: remnantNext: remolding Glossary Search. Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2021, except where stated.

What is sensitivity and thixotropy?

Unconfined compressive strength & Sensitivity of clays: Sensitivity, St is defined as the ratio of unconfined compressive strength of clay in undisturbed state to unconfined compressive strength of a same clay in remoulded state at unaltered water content. …

What is thixotropy of clay?

Thixotropy is a distinctively rheological (time-dependent) phenomenon, which is found in many complex materials, especially colloidal systems as fine-grained soils. Clays are materials that can recover their initial strength after remoulding.

What does thixotropy mean?

: the property of various gels of becoming fluid when disturbed (as by shaking) … says that blood liquefaction can be explained in terms of a phenomenon called thixotropy.

Which strength theory is applicable to cohesive frictional soil?

Mohr – Coulomb’s strength theory 2. Purely cohesive soil (C – soil) :- • These are the soils which exhibit cohesion but, the angle of shearing resistance,φ = 0.

What is represented by the clay in the activity?

Answer: the clay represented the moving tectonic plates.

What happens when you continue pushing the clay?

Answer. Answer: the clay will be flattened.

What does the clay represent?

Explanation: The strips of the clay resembling rocky surfaces represent the uppermost part of the mantle of the earth. The uppermost part of the earth has valleys, rocky surfaces, islands, and mountains. Since the two plates of the earth that collide are less dense, so there are no trench or volcanoes.

How do you make clay activities?

10 Fun Clay Craft Ideas for Children

1. Clay Caterpillar. This is one of the many creative clay activities for pre-schoolers.
2. Clay Cone Ice-creams. This is a wonderful clay modelling idea for kindergarteners.
3. Cookie Cutter Shapes.
4. Seashell and Pasta Impressions.
5. Fruit Basket.
6. Mosaic Art.
7. Celestial Puppets.
8. Leaf Impressions.

How do you make homemade clay at home?

Directions

1. Mix salt with 2/3 cup water in saucepan.
2. Stir and boil until salt dissolves.
3. Remove from heat.
4. Sprinkle cornstarch on table and rolling pin.
5. Roll out clay and cut with cookie cutters.
6. Let dry overnight and decorate with paint, glitter, and so on.
7. Remind your child that these ornaments are not edible!

Can you use Play Doh as clay?

Can I use Play Doh as clay? Both polymer clay and Play-doh are non-toxic and can be molded to create beautiful creations. It is not food safe as the polymer clay is very porous.