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When concrete dries, it shrinks and then cracks. Without the lines, cracks would form randomly in the concrete causing it to break apart. By having the lines, the cracks follow the lines since that is where the slab is the thinnest.
AnswerBecause the sidewalk is made of millions of squares of cement put together and it would be too much work to fill all the lines.
Because the sidewalk is not a continuous pour. They can only pour a few sections at a time. The lines are where one pour ended and another started. Highways and driveways are poured the same way. WITH lines. These lines are also known as stress points, due to expansion and contraction, the weather and the seasons, this keeps the concrete from cracking in the solid portion of the poured form.
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How many syllables does sidewalk have?
The word sidewalk has two syllables. The syllables are side-walk.
Is 3 yards greater than the width of a sidewalk?
Yes. I guess it depends on which sidewalk you're talking about.
Why is important to place gaps at regular intervals in sidewalks?
To prevent sidewalks from cracking in random spots and breaking apart, builders make lines in sidewalks. The technical term for sidewalk lines is contraction joints. Contraction joints are placed in fresh concrete before the concrete dries and has a chance to create its own joints, which we call cracks.
Perimeter of a rectangular sidewalk is 40 ft. The length of the sidwalk is 4 times the width. Find the length and width of the sidewalk?
The width is 4ft the length is 16ft
If a sidewalk is 3 feet wide and 184 feet long how many expansion joints are needed?
The answer will depend on what material the sidewalk is made from and the maximum range in temperature.
