2006-09-14 13:59:28 · 10 answers · asked by wilcide e 1 in Social Science ➔ Other - Social Science
The cracks in between the concrete slabs allow space for the slabs to expand on a hot day. If the sidewalk was made of a continous slab, it will most likely break up and become very uneven on a hot day.
2006-09-14 14:09:46 · answer #1 · answered by lilneo0082 3 · 0⤊ 1⤋
Concrete expands and contracts, but is very unforgiving in that it is also brittle. The least amount of pressure difference exerted on a point that has no give (crack) to allow for release of the pressure, the slab will rupture.
2006-09-14 16:18:17 · answer #2 · answered by Delta Charlie 4 · 0⤊ 0⤋
Easier for future repairs. If a part of the sidewalk is damaged, then it's easier to chip away at that section and re-surface it. If it were a long surfaced strip, it would crack when a portion was chipped away for resurfacing that portion that needed repair.
2006-09-14 14:48:54 · answer #3 · answered by Anonymous · 0⤊ 0⤋
To reduce the chance of cracking and buckling caused by movement, in a similar way to train tracks that have a gap between each rail to absorb heat expansion.
2006-09-14 14:38:09 · answer #4 · answered by stefjeff 4 · 0⤊ 0⤋
Because it's concrete and it's going to crack anyway. Might as well have the cracks look organized.
2006-09-14 14:36:00 · answer #5 · answered by Chris J 6 · 0⤊ 0⤋
It allows them to expand and contract with the temperature. One long strip would crack.
2006-09-14 14:07:58 · answer #6 · answered by Anonymous · 1⤊ 0⤋
concrete will crack at the weakest point so if tree roots or poor soil conditions crack your walk way your repair would be concentrated
2006-09-14 14:24:34 · answer #7 · answered by Anonymous · 2⤊ 0⤋
go back to school. its called expansion and contraction no cracks, big cracks and heaves.
2006-09-14 14:09:08 · answer #8 · answered by La-z Ike 4 · 0⤊ 0⤋
Its cost effective and easier...
What does this have to do with other social science
2006-09-14 14:06:32 · answer #9 · answered by Annie R 5 · 0⤊ 1⤋
they will crack
2006-09-14 14:02:48 · answer #10 · answered by Anonymous · 1⤊ 0⤋