Dilation and Contraction

Demonstration of dilatancy and contraction of soils during shear

[@LittletoeLaden]

Thank you !

[@mateusmbr1]

"Aren't soils cool"? hahahah Thanks for the funny and brillant material, teacher! Greetings from UFPR, Curitiba, Brasil :)

[@nuhaalzayani]

Excellent.. Great Job👏🏻.. will share your videos with my Soil Mechanics students.. Warm Regards from Bahrain, University of Bahrain..🇧🇭

[@janajan2834]

Thank you so much professor...really a cool demonstration... completely satisfied..You are making geotech more interesting..

[@user-yr7fy1cg2u]

Thank you very much. Wonderful explanation.

[@bonbonyang8888]

This is the best explaination and demonstration i have seen so far. Thank you a lot.

[@adanefentie8144]

a brilliant way of expression 10qu

[@stevenwong7715]

Very good explanation Thanks 😘

[@getahunbelegedejene911]

Prf....now i truely understand the concept...thank you very much Prf.

[@ingGS]

The bottle experiment is so cool. I am doing it with my students! Thanks for the video.

[@tahirmaner2953]

wow! what an explanation of a difficult concept. Yes you are right. soil is super cool. :)

[@AlexLovesToRunn]

This is just brilliant. Yes, soils are cool! Very helpful for my Saturated Soil Mechanics course.

[@wendyliu8309]

Thank you so much! One 👍 is definitely not enough! Your videos are awesome and helpful!

[@ahmedkamla2109]

Excellent explanation. Thank you!

[@createtheengineerinyou6921]

Thanks a lot professor for this superb demonstration. May god bless you will a wonderful life.

[@brajessingh184]

That's a very nice explanation, probably the best. Thank you professor

[@sohelkazi40]

love you after 'your love with soil engg', love civil engineering too!

[@bouguerraabdenacer7844]

Thank you for your detailed explanation. Very interesting, This explains the relationship with the soil liquefaction phenomenon?

[@aditha00]

finally understood THANK YOU!!!!

[@sanadambordoloi1991]

Thank you so much for your educative videos on Geotechnical engineering.

[@Android-jw1bq]

Impressive video, thank you so much!

[@anupamjayaraj3780]

😍very helpful sir

[@cristobalalvarado1519]

super cool

[@User-mohammed377]

Thank you very much dear Professor

[@fanchen3538]

Why that the shear stress of dense soil drops back finally as their structure turned dense again, but the volume is still getting bigger?

[@ajaysehrawat445]

really helpful

[@scientificresearch1400]

thanks sir

[@TheAncientColossus]

That is wild.

[@jayj9278]

wow👌

[@jacksonzheng4288]

Hi Professor, I am a young geotech from Australia and i have been following your channels for years. Could you please talk about more of strain controlled and stress controlled direct shear tests? some textbook only make a touch on these two tests, but never showed any examples.

[@teebamohammad7142]

Very simple explanation thanks but what about grains that broken during applied the shear I think the change in volume of the sample due to not from rearrangement of grains only but also from breaking of grains during loading

[@nimaf9667]

Hi One off-topic question; what is water-rich sand and what is the difference between water-rich sand and saturated sand? Thanks in advance.

[@shivashankarrajappa3004]

Prof. So nice. Which university do you teach ? with regards Shivashankar

[@arking1208]

How do we measure the shear strength in a shear box test?

[@MKowalska]

Great video - as always 😁. I don't get one thing - you said that you packed the sand well into the bottle - so why only at the top the behaviour is as for a loose soil? Is the critical void ratio somewhere in the middle?

[@tiosuke38]

maybe its because the bottom part is relatively denser due to the burden of the overlying load , as for the top sand part - it is not overlain by any load - thus it is relatively less dense from the bottom part

[@sureshchaulagain4143]

Loose soil contract and Dense soil dilate, ain't it? 6:43

[@josezelaconcha1330]

soils are cool, but rocks are cooler

[@introductiontogeotechnical4976]

I always thought rocks were hotter :)