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yes, that is why they put expansion joints on bridges. (: your welcomeyes, that is why they put expansion joints on bridges. (: your welcome

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16y ago

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What material allows concrete sections to expand on bridges?

Material such as wood allow the concrete to expand


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.


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.


Why does London bridge not expand?

It is a concrete bridge so has no need to expand.


Does it expand and contract Even after concrete is dry?

No. Concrete never gets any bigger than the day it is poured.


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.


Why do concrete patios crack?

A concrete patio usually cracks due to heat cold. If it is to cold it contract and break. If it is to hot it will expand and break. Then water can seep into those cracks and freeze causing the crack to expand


When temperature rises what will happen to the gaps between the concrete sections?

when the tempreture rises the gaps between the concrete pavement will expand because of the heat.


Why concrete roads have gaps?

because it expands and contracts depending on the temperature..the gaps allow the concrete some space to expand so that it will not crack..


When the temperature rises what will happen to the gaps between the concrete sections?

when the tempreture rises the gaps between the concrete pavement will expand because of the heat.


Is it possible to expand the size of a concrete slab foundation and if so how is it done ie we are knocking down existing house and want to expand the floorplan?

Expand the following: 3 ( 2x +5 )


Why do concrete slabs have space between them?

Those are expansion joints. During the changing seasons with varying temperatures, the slabs expand and contract. The spaces allow the slabs to expand without cracking the concrete.