5. Equipment Calibration

Calibration

Slurry surfacing application equipment requires calibration because it does not mix in batches. Rather, current equipment continuously feeds the individual components (aggregate, emulsified asphalt, mineral...

Calibration Theory

In slurry surfacing systems, the mix design component proportions are based on the weight of dry aggregate. Therefore, corrections for moisture in the aggregate are...

Mineral Filler Calibration Procedure

Example:  Minimum sample size would be 5 lbs. of mineral filler if the scale accuracy is ± 0.1 lb.  The fines feeder should deliver consistent...

Aggregate Calibration Procedure

Example:  If the moisture is 5%, the moisture factor is 1.05.  Calculation:  0.05 + 1.00 = 1.05 Designer’s Note:  A proven moisture content test method...

Graphing Aggregate Calibration Data

Calibration Summary

Determination of Gate Setting using the JMF Once the emulsified asphalt, mineral filler and aggregate feeds have been calibrated, the application equipment must be set...

Mineral Filler Summary

Determination of Mineral Filler Speed Control Setting at JMF Inspector’s Note: Over the course of the job, occasionally verify that the mineral filler speed control...

Test Strips

In full alignment with industry best practices, application and evaluation of a 150-300 m (500-1000 ft) test strip prior to the start of a slurry...

Equipment Calibration

The application equipment is calibrated to produce a mixture that is consistent with the JMF in the approved mix design.  Mix design components are proportioned...

Emulsified Asphalt Calibration Procedure

For Positive Displacement Pumps: Examples of minimum sample size include: 50 lbs. of emulsified asphalt if the scale accuracy is ± 1 lb., 100 lbs....