Laboratory Compaction of Soil

[@r1mat816]

How did you calculate the 0% curve?

[@lirazluna]

How to know if maximum dry density is really 19.05? Is it just estimation?

[@TheWeav94]

Assuming that there is no uncertainty in the test results, there is still some potential for us to develop slightly different maximum dry density values depending on how we draw the curve. So, I don't believe we can say we know the true dry density.

[@chriso2130]

what textbook are you using for these examples?

[@TheWeav94]

When teaching, I was using Geotechnical Engineering: Principles and Practices by Coduto, Yeung, and Kitch. I don’t think I used any specific example from that text for these videos.

[@yasirkhan-br3by]

in modified 56 blows not 25 sir

[@TheWeav94]

When using Method A or B of ASTM D1557, which is most common from my experience in the U.S., you use 25 blows per layer with a 4-inch diameter mold. It is true that with Method C of ASTM D1557, you use a 6-inch diameter mold and apply 56 blows per layer.

[@yasirkhan-br3by]

@@TheWeav94 yes sir now u explain well. thanks for replying and correction

[@monkeyfoot5377]

@@TheWeav94 this is not a fun test method. 🤣

[@irtaza6961]

Thomas guru