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Download AASHTO Soil Classification Excel Spread Sheet [XLSX]

AASHTO stands for American Association of State Highway and Transportation Officials. Developed in 1992 a comprehensive soil classification system that helps field engineers in estimating the general properties and characteristics of the soil encountered during the foundation preparation and other relevant construction works.  After the first publication the classification system has undergone…
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Soil Salinity Reasons and Treatment?

If the concentration of harmful salts in the root zone of a plant increases to such an extent that plant growth is effected, this situation is called Salinity. Salinity is the measure of all the salts dissolved in water. Salinity is usually measured in parts per thousand…
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Causes of Liquefaction of Soil

You might have been to a beach or near a river bank, have you ever noticed the cohesion-less sands there? I am currently working in a project which is in a mountain range with river crossing through and is actually construction of a dam, during my travelling so many times I…
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What Are Atterberg\'s Limit? Liquid Limit Plastic Limit Shrinkage Limit

You might have heard a lot in geotechnical engineering lectures about Atterberg limits but today I have brought to you a very unique and useful importation about Atterberg Limits which you might not even know.  Albert Mauritz Atterberg was a Swedish chemist and agriculture engineer, born on March 19, 1846, received his Doctorate Degree in Chemistry from Uppsala Univeristy in 1872 went to Sweden…
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To Determine Plastic Limit Of Soil

When the soil is added with water enough to make it paste like material it is termed as plastic state; in this state the soil can be molded into any shape without breaking and thus called plastic. If more water is added into the soil it will start flowing like a liquid; this…
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Ingredients of Soil Cement

Soil Cement is a low cost paving material when used as a base in the pavements for protection of subgrade, or used as a facing material for earth fill dams where suitable riprap is not available, or used as a bedding of drainage concrete heavy pipes, or is also used as slope protection. The ingredients required for soil cement, as already mentioned before, are cement, soil and water.Each…
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What are Stresses in Soil, Over burden Pressure, Total Stress, Effective Stress, Pore water Pressure

The Structural loads are supported on soil through foundations. These loads produce stresses and resulting strains or deformations in the soil below the foundation. The deformation in the vertical direction is usually termed as settlement, which occurs due to the vertical stresses. Stresses in a Soil Mass The stresses which produce excessive deformations are termed as failure…
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Download Offshore Soil Mechanics by Arnold Verruijt Free [PDF]

In soil mechanics the equilibrium and movement of s oil b o dies is studied, where soil is understood to be the weathered natural material in the upper layers (say the upper 20 to 100 m) of the earth’s crust. This material may be gravel, sand, clay, peat, or some other rather soft and loose granular medium. The nature of these materials is quite different from artificial man-made materials…
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Download free Principles of Geotechnical Engineering by Braja M. Das 5th Edition [pdf]

As far as definition of soil is concerned soil may be defined in many ways; but in this book soil is defined as ;  ,  soil is defined as the uncemented aggregate of mineral grains and decayed organic matter (solid particles) with liquid and gas in the empty spaces between the solid particles Soil is used as a construction material in various civil engineering projects, and it supports…
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