Inspection for milled asphalt and base coarse for reuse as for improved subbase based on BS
1. Preliminary Assessment
2. Visual Inspection
- Compare the color consistency throughout the material.
- Check for variations in texture across the surface.
- Look for signs of segregation in the material.
- Ensure that the surface feels uniform to the touch.
- Identify any cracks larger than specified limits.
- Check for surface wear or erosion.
- Look for signs of raveling or disintegration.
- Assess the overall structural integrity visually.
3. Material Sampling
4. Laboratory Testing
- Collect representative samples of milled asphalt and base coarse.
- Sieve samples through a series of standard sieves.
- Record weight of material retained on each sieve.
- Calculate percentage passing each sieve to determine distribution.
- Prepare a portion of the soil sample for testing.
- Determine the liquid limit using a Casagrande apparatus.
- Measure the plastic limit by rolling the soil into threads.
- Calculate the plasticity index by subtracting plastic limit from liquid limit.
- Obtain a sample of the material for testing.
- Conduct Standard Proctor or Modified Proctor tests.
- Determine the maximum dry density and optimum moisture content.
- Record results for further analysis and comparison.
- Collect samples for laboratory analysis.
- Use appropriate methods (e.g., XRF, GC-MS) to test for contaminants.
- Compare results against regulatory limits and guidelines.
- Document findings and recommend actions based on contamination levels.
5. Compliance with Standards
6. Field Testing
- Calibrate the nuclear density gauge before use.
- Select appropriate test locations randomly across the site.
- Place the gauge on the surface and initiate the test.
- Record density readings and moisture content.
- Ensure compliance with safety regulations when using nuclear devices.
- Collect undisturbed soil samples for testing.
- Prepare the samples in the laboratory as per standards.
- Soak the samples for 96 hours if required.
- Apply load to the sample and measure penetration.
- Calculate CBR value based on penetration data.
- Inspect the site for existing drainage features.
- Conduct permeability tests on the material if necessary.
- Evaluate surface water runoff and drainage patterns.
- Determine soil saturation levels during testing.
- Document findings and recommend necessary drainage improvements.
7. Documentation and Reporting
8. Final Recommendations
- Assess material properties and composition.
- Evaluate compatibility with existing subbase layers.
- Determine optimal thickness for effective performance.
- Recommend specific applications based on site conditions.
- Identify necessary stabilization agents if required.
- Recommend surface treatments for enhanced durability.
- Suggest compaction techniques to improve density.
- Consider moisture control measures to prevent weakening.
- Establish a schedule for regular inspections.
- Monitor for signs of erosion or settling.
- Implement repair protocols for identified issues.
- Document performance to guide future projects.
Use in Manifestly