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Hey, nobody's perfect!
You see it all around you....good masonry gone bad!
"Why does it happen?
Because it happens.
Roll the bones!
Whenever I'm walking or driving, I try to notice a lot of the masonry work around. Often it's something striking and unique that captures my attention. But often it's the "uh-oh's" and "oopsie's" that lure me to take a closer look. I've been doing this for years, and I have developed several theories about masonry faults.
Theory One: expansion and contraction rates are substantially different for different materials and allowances MUST be made. I don't believe that formed concrete and brick/mortar masonry make good bedfellows. Photos below are of a low retaining wall that surrounds the Cranford Hotel. Planted with small annual and perennial flowering plants, it is absolutely charming!
But, OUCH! What happened here?
What caused this separation?
Or this one?
Hokey smoke! What is going on here?
If I were to guess, I'd blame a concrete substructure. I can't think what else might have caused this type of damage. They aren't merely cracks. They are most sincerely separations - as if they were pushed out by something bigger and stronger.
Below is another retaining wall without a single fault in the masonry. Granted, it is more recent vintage. Is that the only reason?
I was wondering if maybe it was double walled brick and mortar.
If you look at a concrete sidewalk, you will notice flexible spacers every two squares or approx. 8 ' called an expansion joint. There is also a 1/2 to 3/4" deep groove carved into the concrete midway between the expansion joints which makes the walk look like a series of squares. Not just for looks, these "control joints" encourage the concrete to crack in a straight line if the expansion joint isn't enough allowance.
I see this problem everywhere! ....Metal vs. Concrete.
My money's on Metal - seems to win every time. Hasn't anybody ever noticed???
Alrighty, then - let ME be the one to develop an expansion medium for this application and make a billion, trillion $'s!!
I mean it: cracks EVERY time!
1929! I suppose this concrete could be 77 years old, but age really isn't the factor.
The rest of it is perfect! (The manhole and sewer grate shown earlier are at the top of this photo.) And wait a minute.....
isn't that MY driveway on the left? That's right. I didn't have to look very far at all for an example of Metal vs. Concrete, did I?
This one's a bit of a mystery. Any ideas?
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