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Concrete, whether in a road or a building expands (gets longer) in hot weather and contracts (gets shorter) in cold weather.
So the builders install an expansion strip every so many feet to allow the concrete to make these small but significant changes in length. If this were not done, the concrete, when warm, would expand, and having nowhere to go, would go up (roads) or out (buildings), thus ruining the road or building.
These expansion joints are filled with pitch, tar, or mastic - they call it different things in different parts of the country - to keep out water. Water would freeze, and cause the same problems.
Weldon Crona
Wiki User
∙ 6y agoThe lines of pitch between sections of concrete is to allow for expansion. The concrete would have been laid is sections formed by the wooden planks. Once the concrete sets, the wooden planks would have been removed from each section in turn. The molten pitch (tar) would have been poured into the gap left by the removed planks to fill in the gaps.
Wiki User
∙ 6y agoThe pitch allows for the concrete to expand and contract with temperature differences.
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Why do concrete roads have gaps between large pieces of concrete?
As the weather varies the concrete expands and contracts. If there were no gaps the concrete would buckle and crack.
Who invented paved roads?
It is unknown who came up with the idea to pave roads with concrete. The first concrete paved road was built in 1909 and was Woodward Avenue in Detroit, Michigan.
Roads are made up of what?
sand gravel, asphalt, pavement, concrete, and rebar
What is better for residential roads concrete or asphalt?
concrete due to lime which neutralizes acid and toxicities in rain thus purifying before it runs into storm sewers which goes into the waterways
How do you pour concrete on a slope?
The area to be concreted is sectioned off is small section across and up the incline. The hardcore base is fully compacted to prevent movement. The mix is made and is put into each section and allowed to go off before removing the horizontal board at the bottom of the concreted section. In most cases an additive is used to make the mix set quicker than normal thus preventing running. In the case of large areas (i.e. sides of roads, etc.) they actually used a preset slab which is lifted into place and has expansion joins inset to cope with heat changes in the concrete.
Why do roads have the gaps between the large pieces of concrete?
They are expansion gaps that allow for the expansion and contraction of the concrete.
Why do concrete roads have gaps between large pieces of concrete?
As the weather varies the concrete expands and contracts. If there were no gaps the concrete would buckle and crack.
Are there concrete roads in Washington state?
No the roads are made out of asphalt.
Why are concrete roads laid in sections with a pitch between them?
Because then it has room for moving and shrinking, growing etc Concrete roads and pavements are laid in sections and a all gap is left between each sections. This is filled either tarmac or rubber compound
What has the author D R Sharp written?
D. R Sharp has written: 'Concrete roads in Denmark, Western Germany and Holland, their layout, design and construction [by] D.R. Sharp [and] L.S. Blake' -- subject- s -: Concrete Roads, Europe, Roads, Roads, Concrete
What are roman roads made of?
concrete
When is concrete used without metal reinforcement bars?
Concrete are used without reinforcement bars on concrete roads.
What are some things concrete is used for?
Sidewalks and roads.
How did roads aqueducts and concrete contribute to life?
Hhh
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.
Who invented paved roads?
It is unknown who came up with the idea to pave roads with concrete. The first concrete paved road was built in 1909 and was Woodward Avenue in Detroit, Michigan.
