Steps to oversee the implementation of road projects - an earthworks 5
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Adhesive layer of asphalt (RC2):
1 - Ensure the cleanliness of the surface layer asphalt core.
2 - make sure the temperature of liquid asphalt material before spraying according to the specifications.
3 - to ensure the regularity of spraying according to the rate required.
4 - If there are places with in excess of the required application rate shall be addressed before the brushes, and by placing a quantity of sand and stirred them to take the excess asphalt then lifted away from the road.
5 - do not spray during rain.
Surface layer of pavement Asphalt Wearing Course:
1 - Adoption of solid materials (gravel, sand and powder) in supervising the tests and their results matched the specifications are:
- Gradient (analysis Almnkhala).
- Coefficient of plasticity.
- Resistance to corrosion (land) by a Los Angeles.
- Sand equivalent.
- Checking the authenticity solution of magnesium sulfate / sodium
2 - Adoption of asphalt mix design Job Mix Design and supervision of the Marshall test and verification of:
- Gradient (analysis Almnkhala).
- Percentage of asphalt.
- Stability.
- The flow.
- The proportion of voids.
3 - make sure the temperature of the asphalt mixture in accordance with the specifications.
4 - make sure the asphalt mixing and homogeneity by the brushes.
5 - taking samples periodically from the asphalt mixture behind the uniqueness of the extraction test and Marshall test, and verification of test results matching the specifications.
6 - oversee the process of fresh asphalt mix and make sure the thickness of the class raised it to about (15-20%) before compaction.
7 - to ensure that construction joints perpendicular to the road surface and the full depth of the layer.
8 - Ensure spray intervals structural adhesive layer R. C before mixing the new brushes.
9 - not fresh asphalt mixture during the rains.
10 - oversee the process of compaction Palmdahl steel and rubber and make sure equipment and machinery, relevance and order entered on the layer.
11 - Verification of the compaction ratio and the thickness of the layer of asphalt testing Heart Core test Asphalt in accordance with the specifications.
12 - Review and receive elevations and flat surface longitudinally and transversally after compaction.
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