{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

classify - 53:030 Class Notes;C.C Swan University of Iowa...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Period #6: Soil Classification Systems and Usage A. Fundamental Idea: Collect soil samples from the field. Perform easy and inexpensive tests on the soil samples (typically GSD tests and Atterberg Limit tests) Based on the results from these tests, classify the soil(s) in question Based on the classifications of the soil(s), determine whether or not the might be appropriate for the intended usage. If yes, perform more extensive lab tests on the soil(s) (shear strength, consolidation, compaction, etc.) as needed. MAJOR SOIL CLASSIFICATION SYSTEMS USED IN THE U.S. USDA Textural Class ification : Used primarily in agriculture, but not much by civil or geotechnical engineers. AASHTO Classificati on System : Used quite extensively by civil engineers in selecting soils for usage in roads and highways. Unified Classificat ion System (UCS) : Used by geotechnical engineers for selecting appropriate soils in non-highway projects. 1 53:030 Class Notes;C.C. Swan, University of Iowa
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 B. USDA Textural Classification This system is based entirely on the GSD of a given soil sample. Soil Type Diameter Range Cobbles & Boulders d > 75mm Gravels 2mm d 75mm Sands 0.05mm d < 2mm Silts 0.002mm d < 0.05mm Clays d 0.002mm The classification in this system is based on the relative % sand, % silt, and % clay.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern