Why does salt scaling damage concrete?

[@Khaztr]

Holy smokes, this video is a rare gem -explains the "spalling" effect better than any other explanation I've been able to find. Every other explanation I seen leaves so many holes in their logic, but this is so much more complete. Thank you!

[@nyapolamichaelokul57]

When severe corrosion to natural stone, concrete, bricks,, mortar and plaster in 6:42 OPC occur as a result of efflorescence what is the best way to handle it? I have over time been amazed by how you explain complex construction nightmares

[@Alex_Plante]

I'm a municipal engineer in Montreal, and frost damage to concrete is a huge problem here. Most people are aware that Montreal is cold in the winter, but what many people do not realize, is that we suffer from some of the most frequent freeze-thaw cycles and the highest risk of freezing rain in the world. Things wouldn't be so bad if the temperature remained cold all winter, but it's the frequent freeze-thaw cycles that are the real destroyers of concrete.

[@stevewaclo167]

Any way to repair spalling?

[@KingsRight]

if i have a brick foundation to my house, but i live in a warmer climate where freezing is rare, i should be able to put rock salt down around the foundation then to prevent weeds?

[@TheMissionalNomad]

Is there anything that you can do to protect your concrete from spalling

[@BobbyWhitus]

Tyler! I can't tell you how much I"ve learned from watching your videos. I'm a construction worker by trade, and in the blue collar world, far from academia, we are taught that "spalling" occurs due to water being absorbed into the surface pores of the concrete and then freezing. I trust your knowledge implicitly and am ready to throw away a lifetime of experience, this is not a challenge. I want to be corrected. I have personally seen concrete spall where no salt was ever used. Is it possible for water to absorb into concrete then freeze and expand breaking apart the concrete at the surface as I have been taught and always believed?

[@HeavyDemir]

how about salt in the concrete mix, does that have an adverse effect

[@climatechangelumber5480]

Does stuff like, "copper green" and "Woodlife copper preservative" cause spalling or in any way damage first year concrete? I called 5 concrete sales places and 2 concrete contractors just now in North Carolina, and they each have no idea what the answer is .

[@brenadavis8131]

That helps a lot Brena

[@jandraelune1]

Not just salt but also how close plows scrap, too close and the plow blade bits into the cracks making them larger, add to that the high speed the plows are moving increases that impact dmg.

[@duckey19083]

Thanks for the video. Is it only salt that creates the scaling? Could pouring concrete within four days of winter, when all of a sudden there are cold, very cold, and freezing temperatures at night with above 40F temps during some days, throw in a couple nights of rain, plus snow Jan third, and the freezing nights and thawing days afterward?

[@davy1458]

So is salt bad for concrete or not?

[@jameslynch8466]

Thanks for your time and sharing your knowledge. Merry Christmas and happy New Year.

[@TylerLey]

Thanks James! A Merry Christmas to you as well!

[@patrickp6775]

How is cement made? Great idea for a video.

[@TylerLey]

Thanks! Here is a video about that - kzbin.info/www/bejne/g3-uXq1jaJp_fZI

[@mawulinyameso8113]

Ha! I am always thankful we do not have snow in the tropics it only increases the demands on buildings. Thanks Dr. Ley

[@TylerLey]

Thanks Mawuli!

[@alinau8091]

Thank you so much, you have the vocation of teaching!

[@markthompson4099]

I find this highly logical captain. A vulcanized mind melt indeed with a cemented melting of the minds. So do not add salt to injury. Yes my concrete guru. I love your brilliance. THANK YOU.

[@szargos]

So is the best option to only use sand, which only helps with traction?

[@homayounshirazi9550]

Is it possible to minimize the amount of water added to cement at the time of mixing it so as to reduce the trapped water in concrete?

[@Alex_Plante]

You can use super-plastifiers

[@jatinghori4245]

But by application of salt ..will there be risk of chloride attack?

[@stevezielonko1386]

Can Spall damage be repaired?

[@TylerLey]

If you wait until the scalling has stabilized then I think you can repair it.

[@teslastones]

Yes. There are ways to stop the process ( not just address the symptom ) and apply a polymerized cementitious overlay that will last for decades. I have been resolving issues related to this for 47 years. I have projects done in the 70’s still giving good service . At the time, the slab was candidate for removal and replace Sometimes that is what is needed. Someone who knows what they are looking at can advise you

[@m.5051]

I'm probably commenting too late but I am not understanding how the brine pockets come into play in regards to the formation of spalls. Is it because these areas are not able to freeze, but the surrounding areas are, creating an uneven stress distribution across the top surface of the concrete? Thanks.

[@bmaw604]

Maybe do a video on pouring concrete on frozen ground or frozen rebar.

[@TylerLey]

Thanks for the comment! I would not recommend it! 😀

[@hishamalahmed7223]

Sir the price of fly ash in Saudi Arabia is double the price of cement?????

[@TylerLey]

Thanks! Everyplace is different.

[@hamzamMR]

Thanks dr tyler !!!

[@TylerLey]

Thanks Hamza!

[@kiranrampp19]

Good one..!!!

[@TylerLey]

Thanks!

[@Iquey]

There must be more concrete-safe ways to melt ice, like maybe sand and charcoal? Charcoal us black so it will increase the solar energy around the ice and therefore melt it? It will look ugly but it will easily wash away.

[@bogey19018]

Heat from salt melting will damage concrete.

[@teslastones]

It doesn’t harm all concrete. Mostly only concrete made with OPC