Quote:
Originally Posted by URY914
Really a situation of cracks in the concrete allow water to enter and the rebar may not have proper concrete coverage and it is too close to the surface. One thing leads to another....
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Modern concrete is lightweight and porous allowing for moisture and salt penetration
-It is usually not sealed externally afterwards, especially on top
-Rebar is often undersized, not welded, is round and does not grip, and doesn't have an anti-oxidant composition such as brass or chromium
-Designers love to create flamboyant looks such as large unsupported balconies and complete walls of uninterrupted glass. (cring)
I wonder what building practices can be upgraded to prevent spalling, such as rubberizers or plasticizers or natural epoxies in the mix which would prevent air penetration.
https://theabeton.com/blogs/news/colosseum
Curiosity got me researching more on Roman concrete and it was said they got stronger over time instead of getting brittle and weak despite all the rains and harsh sun, and that’s because they had cautiously mixed aggregates like volcanic ash, heavy limestone and seawater in the concrete mix that created extremely durable minerals.