Steps to oversee the implementation of road projects - an earthworks 4
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Asphalt layer of the adhesive (Prime Coat (MC1:
1 - absolutely certain of the cleanliness and consistency of the soil surface layer under the foundation.
2 - make sure the total dry surface layer under the foundation.
3 - make sure the temperature of liquid asphalt material before spraying according to the specifications.
4 - check the regularity of spraying according to the rate required.
5 - Not spraying during the rains.
6 - Verification of no increase in the proportion required for spraying, and in the case of places with increased brushes are processed by the asphalt mixture.
7 - must be kept free from traffic class for a period not less than 24 hours, and after this period must maintain maintenance until a layer of asphalt layer.
Base layer of the asphalt Asphalt Base Course:
1 - Adoption of the debris on the mixer (gradient materials) and otherwise overseeing the tests and the results match the specifications are:
- Gradient (analysis Almnkhala).
- Coefficient of plasticity of soft materials.
- Sand equivalent.
- Resistance to corrosion.
- Checking the authenticity Soundness (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 air spaces and voids filled.
3 - Ensure dry bituminous layer absorption.
4 - make sure to clean the surface of the adhesive layer (MC1) the use of air compressors.
5 - make sure the temperature of the asphalt mixture and color according to the specifications.
6 - make sure the asphalt mixing and homogeneity by the brushes.
7 - Sampling on a regular basis of the mixture behind the uniqueness of the extraction test and Marshall test, and verify the conformity of the test results of Specification (gradient - the proportion of asphalt - flow - rate and air-filled spaces).
8 - oversee the process of fresh asphalt mix and make sure the thickness of the class raised it to about (15-20%) before compaction.
9 - to ensure that construction joints perpendicular to the road surface and the full depth of the layer.
10 - make sure spray intervals structural layer paste (R C2) before mixing the new brushes.
11 - in the case of fresh asphalt mixture in more than one layer does not authorize subsequent mat layer only after the completion of your blood and the cold layer above.
12 - Non-blended asphalt coverings during the rains.
13 - oversee the process of compaction Palmdahl steel and rubber, and make sure the speed of Roller and do not exceed the specifications, and make sure equipment and machinery, relevance and order entered on the layer.
14 - Verification of the compaction ratio and the thickness of the layer test heart asphalt Asphalt Core test in accordance with the specifications.
15 - Review and receive elevations and flat surface after compaction.
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