Why do concrete roads have gaps filled with tar ?
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it helps roads water to go away from it
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Answer:
There are gaps left between slabs of concrete so when the concrete expands and contracts because of changing temperature the concrete slab wont crack and the reason they fill it with tar is because it keeps water from running in the cracks and undermining the slabs while at the same time remaining squishy enuff to allow for the movement of the slab
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