Intro to Sulfate Attack!

Sulfate attack is one of the most miss understood concrete deterioration mechanism. The video explains how there are two forms of sulfate attack. The first type is chemical sulfate attack. This is where sulfates cause new hydration products to form within concrete that cause damage to the concrete. With additional exposure the concrete hydration products are attacked and this causes the concrete to dissolve. Next, the video talks about physical salt attack or sulfate attack. This occurs when salts become dissolved in water and penetrate through concrete and evaporate on the other surface. When the moisture penetrates it leaves salts behind that causes the surface of the concrete to spall off. The key difference between these mechanisms is that with chemical sulfate attack the salts cause a new product to form. Methods to suppress this deterioration are also discussed.
Thanks to Hailey Goodale! She edited this video and is my Director of Awesome.
My website is:
www.tylerley.com
If you would like to donate to my channel please visit
www.tylerley.co...

[@sashilaasgiriyage8598]

hi Prof Tyler, Thanks for the video. I have a request, can you please add a video on Acid Sulfate Soils and how to achieve durable concrete, 100y and more

[@GreentopLandscapes]

Love it

[@josephrapella697]

thank you

[@muhanadeldagar2611]

Thanks
You gave me what I needed
You also inspired me how to deliver my presentation 🌹🌹

[@memmoyoum]

Great video as always. Thank you Dr. Ley!

[@TylerLey]

Thank you Mehmet!!!

[@anthonymartinez2340]

Thanks for the awesome videos

[@LouisMorissette]

Thank you!! This helped me a lot

[@er.vinodkumar2437]

thank u so much Mr. lay . great explaination.

[@TylerLey]

Glad you liked it!

[@rawaaalhilween8333]

please keep up, great explanation

[@darinhodges186]

Love the channel videos! SDDOT will have a report coming out soon on Sulfate levels in SD and if PLC's will be OK in the high sulfate soils of SD.

[@TylerLey]

Thanks Darin!
Please share it when you get a chance. I have at least one more video coming about sulfate attack.

[@jonathandennis8198]

Darin - Looking forward to the report. Please let me know if there's anything we (GCC) can do to help with the research/testing.
Tyler - Thanks for the videos. Great balance of solid technical information and entertainment!

[@TylerLey]

@@jonathandennis8198 Thanks!!!

[@NegarRiahi]

Li2SO4 Lithionit contains sulfate....in Sweden

[@AHMEDALSHAIBANIasa]

appreciate your good job

[@vedanshubansal116]

Your videos are really helpful.. Thanks !

[@TylerLey]

Thank you!

[@arsh9911]

useful info!!!!!!!!!!!!1

[@kiranrampp19]

Good one sir..!!

[@TylerLey]

Thanks!

[@ismadd1990]

what if I mixed Barium sulfate on concrete, does the concrete deteriorate as well?

[@maxhatman3218]

Hi Tyler - thanks for putting this content up - much appreciated. I do have a question. We deal with flooded properties and flooring failures - sometimes floor tiles with cement adhesive and cement based grouting suffer from tile cracking. Looks like sideways pressure. Sodium lauryl sulfate is present in floor cleaners. Is it possible that heavy use of this type of floor cleaner could cause ettringite to be formed? Could that chemistry work
I noticed this occurred recently after a flooding event - perhaps the prolonged immersion increased the reaction, with the detergent residue? I did hear of an incident where this was said to have caused a large ceramic tile floor to explode from the sideways pressure (this was in a zoo and was attributed to the cleaning chemical being used. But I'm not sure of this was the commonly used Sodium lauryl sulfate?)

[@sinclairconstructiongroup4844]

Great video, Tyler!
Question - if the capillary structure of the concrete was completely filled with CSH, would this ever be an issue?
Thanks!

[@TylerLey]

Sinclair - Thanks for the question. You will never get your pore structure totally filled with CSH. There will always be some space. Check this video out where I talk about it: czcams.com/video/nxSZvC4dBPE/video.html
For Chemical Suflate Attack - Even with low w/cm concrete and really good curing this can be a problem. It will delay the problem but it will still be a problem.
For Physical Suflate Attack - If you can get your w/cm < 0.45 and do a good job curing then I think you can stop it.

[@brucewinningham4959]

Are Geographical locations such as Rome or maybe Egypt more likely to have better concrete longetivity due to the Geologic conditions containing less Sulfates?
Since you mentioned Water, could the Lack of Water in the Desert Climates of Egypt also be a Factor in Egypt's Concrete Longetivity?
What I am asking then is would it NOT be "Next to impossible" for a Country, such as the USA, to have the Exact Same Concrete Durability as places like Rome?
One of my Professors emphasized "Geology controls just about Everything." Geology is often misquoted as being the Study of Rocks which is Petrology, Geology studies the Rocks, Soils, Volcanoes, Sea Water, Ground Water, Surface Water, etc. or about anything to do with the Earth Sciences.
I used to be a Mortician. I learned in Mortuary College that it was next to impossible for an Embalmer in the US to achieve the exact same long lasting effects as the Ancient Egyptians who used very Different Embalming Techniques which may take as long as 40

[@brucewinningham4959]

.... from 40 to 70 days. As the Professor said, Geology controls everything, including how long Concrete will Last above ground "OR" how long a Deceased Human Remains will be Perfectly Preserved Underground. There are just way too many External & Internal Values that need to be considered, many of which can't be foreknown!

[@chianhuasi4946]

Do you recommend using bituminous paint against sulfate attack?

[@abduarhimabogdera7671]

Hi Tyler
What is the effect of variables on the chemical environment at the interface?

[@vloogle4924]

How do submerged columns survive?

[@ChadKovac]

I'm curious about aircrete (concrete filled with soapy bubbles). People like to use Seventh Generation dish soap which has magnesium chloride and sodium lauryl sulfate... are those a problem for air-filled concrete?

[@theyuha]

Will 8 bag mix concrete protect concrete slab from salt, like salt you put down for ice, better than 6 bag mix? Will 6 and 1/2 bag be an improvement over 6 bag mix?

[@hamzamMR]

go blanka for this one, lol !! good video dr tyler .

[@TylerLey]

Thanks Hamza! I hope we can meet someday!

[@hamzamMR]

@@TylerLey me toooo !!!! I'll be honored 👌.

[@pedroc9175]

Great way to review class material !

[@TylerLey]

Thanks! More coming!

[@rakeshchavan7844]

👍👍👍👍

[@mopo3953]

Great video. I loved Street Fighter as well ;)
What is a thaumasite sulphate attack (TSA)? Is it one these 2 types which you mentioned or is it another type?

[@jauld360]

TSA is a different form of sulphate attack. TSA requires sulphates and carbonation and sulphate resisting Portland cement does not provide protection against TSA. TSA is favoured by cold, damp conditions.
www.understanding-cement.com/sulfate.html

[@aymannassar6988]

👍👍👍

[@TylerLey]

Thanks Ayman!

[@khalidsalah8482]

Thank you professor.
I've worked on self-consolidating concrete utilizing limestone powder. I'm going to test the sulfate attack. So could you give me your comments about using Limestone powder as a cement replacement materials.
As you know Limestone powder has been limited up to 35% by EN 197-1:1992 (Table 1)

[@TylerLey]

Khalid,
I think most people are worried about brucite attack at high limestone replacement levels. It is very rare but has been seen in Europe. There is not a lot of experience at high limestone replacement levels and so I think people are being cautious.

[@khalidabunaouf3343]

Thanks professor

[@mohammedqader6891]

sir can i ask you one please