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Why do they cut up the road after it is just paved? | |
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Actually, they are removing an asphalt core. With this
core the lab technician can determine the percent compaction of the asphalt
pavement. If the minimum compaction percentage has not been met, the Contractor
can be penalized or he may have to remove and replace the defective mix
with mix that meets the compaction specifications.
For further information, questions, or comments write, call or email: |
QA Lab |
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Contact: | Fred Arendt |
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Are there any alternate ways to check for compaction that do not cut holes in the roadway? | |
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A Nuclear Density Gauge is sometimes used to check
for compaction. This device allows the operator to check the compaction
without cutting the pavement.
For further information, questions, or comments write, call or email: |
QA Lab |
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Contact: | Fred Arendt |
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Why do they roll the road with a rubber tire roller? | |
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The rubber tire roller, which is also referred to as a
pneumatic roller, provides some compaction. It also provides a kneading
action that seals the surface of the mat. This helps prevent moisture from
getting into the pavement.
For further information, questions, or comments write, call or email: |
QA Lab |
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Contact: | Fred Arendt |
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How hot is asphalt pavement when it is placed? | |
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The suggested temperature is usually around 300 degrees
Fahrenheit.
For further information, questions, or comments write, call or email: |
QA Lab |
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Contact: | Fred Arendt |
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Why do they spray tar on the old road before they pave? | |
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The substance sprayed on the old pavement is a liquid asphalt
called tack. It is a mixture of asphalt & water or asphalt & solvent.
It is heated so it can be sprayed. Its main purpose is to bond the old
pavement with the new.
For further information, questions, or comments write, call or email: |
QA Lab |
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Contact: | Fred Arendt |
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What happens to the pavement that gets milled up? | |
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This varies by the project, but most of the time it gets
recycled and reused again in a RAP(Reclaimed Asphalt Pavement) asphalt
pavement mix.
For further information, questions, or comments write, call or email: |
QA Lab |
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Contact: | Fred Arendt |