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Why do engineers design city sidewalks using blocks of concrete separated by a small gap to prevent them from cracking?
Wiki User
∙ 10y ago
That is to account for thermal expansion.
Wiki User
∙ 10y ago
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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.
How does cracking oil fractions form hydrogen?
Magic. :D
Why are there lines in the sidewalk?
AnswerWhen 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.ANSWER: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.jfdjnvndmnmvfnjndnvjnd
What does scc stands for?
Stress Corrosion Cracking, a failure which occurs when metals are exposed to stress in a corroding environment.
Why is PINE963 and apple a strong password?
2 common words from the dictionary ("PINE" and "apple"). This only leaves the "963$&" to be guessed. Which would not be difficult in a password cracking program.
Why are there gaps in between sidewalks?
Concrete, like most materials, expands and contracts with the temperature. The gaps allow the surface to do so without cracking.
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.
Why does the expansion joints in a sidewalk get narrow in the summer and get wider in the winter?
Expansion joints in sidewalks are designed to accommodate the natural expansion and contraction of the concrete due to temperature changes. In the summer, the concrete expands with the heat, causing the joints to narrow. In winter, when the concrete contracts in the cold, the joints widen to prevent cracking and damage to the sidewalk.
How do concrete gaps keep the concrete from cracking during the winter?
During winter when the concrete contracts/shrinks and there is no gap, then it will crack from the surface. So gaps are left in concrete such that it can shrink to a safe limit without cracking it.
How do expansion joints in a sidewalk keep the concrete from cracking?
The expansion joint in a sidewalk keeps the concrete from cracking just as what its called. It allows the concrete to expand when heated and contract when cold. Without the joint, the concrete will crack and become uneven or mountain up.
Can you pour a concrete slab onto another concrete slab?
No. Concrete won't bond to concrete. It will end up cracking.
What happens when concrete has no steel reinforcement?
The concrete would be weaker, and more prone to cracking.
Why underestimate the resistance of concrete to such a large extent when you design concrete columns?
The designers calculate the potential effects of cracking on the concrete columns.
Is tar useful in concrete roads?
Because the concrete will expand and the tar will become soft. So the concrete has room to expand. With out cracking.
How tar is useful in concrete roads?
Because the concrete will expand and the tar will become soft. So the concrete has room to expand. With out cracking.
Why are there gaps between the slabs of concrete pavements?
There are 2 reasons for that. Reason one: They can be expansion joints. In the winter the pavement contracts and in the summer it expands. these joints are generally gaps that go the whole way threw the pavement. Generally these joints are filled with some sort of caulking to keep moisture from getting underneath the pavement. Reason two: They can be put there as joints for the concrete to crack. when sidewalks are made and other concrete pavements, they anticipate the concrete cracking, so they put in gaps that dont go all the way threw the depth of the concrete as a place for the concrete to crack and not be unsightly.
Why in case of high strength concrete you are getting step snoop of curve after cracking of concrete?
gravitation is inversly proportional to weaight
