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CONTROL CHARTS
Asphalt Mix Production Control Charts - Asphalt Binder Content

MS 2: Asphalt Mix Design Methods

Control Charts

Asphalt Mix Production Control Charts for Daily Mix Verification - Asphalt Binder Content

Reference Asphalt Institute MS 2

Daily verification of asphalt mix production is critical to plant process control and can help identify potential acceptance problems and can provide early warning by indicating if the mixture properties deviate from the specifications. Continuous plots of mix data for percent air voids, binder content, Voids in Mineral Aggregates (VMA), Voids Filled with Asphalt (VFA), aggregate percentages passing certain sieves such as 4.75 mm (No. 4), 600 μm (No. 30) and 75 μm (No. 200) etc. provide a graphic representation of the production process. Target values and tolerance limits for each material property are drawn on the chart and then production values are plotted in relation to these limits. Control charts can help differentiate between variations inherent in the material and that could occur during production variation and often provides early signs of problems that need attention.

Percent Air Voids (Pa) - The volume of air voids in a compacted mixture, expressed as a percentage of the total mix volume.

Voids in the Mineral Aggregate (VMA) - The voids created by the aggregate structure of a compacted asphalt mixture, expressed as a percentage of the total mix volume. VMA represents the volume of air voids and effective (nonabsorbed) asphalt binder.

Voids Filled with Asphalt (VFA) - The percentage of the VMA filled with effective (nonabsorbed) asphalt binder.

Percent Binder Effective (Pbe) - The functional portion of the asphalt binder that coats the aggregate in the asphalt mixture but is not absorbed into the aggregate, expressed as a percentage of the total mix mass.

Percent Binder Absorbed (Pba) - The portion of the asphalt binder that is absorbed into the aggregate, expressed as a percentage of the total aggregate mass.

Project and Sample Details - Input

Please enter the Project Details to appear on the generated pdf report.

Please enter the Sample Details to appear on the generated pdf report.

Please enter the trace name to appear on the legend section of charts.

Please enter brief remarks to appear on the generated pdf report.

Asphalt Mix Parameters and Control Limits - Input

Please enter the Asphalt Mix Design Method adopted (for the project/mix) to appear on the generated pdf report.

Please enter the targeted/design asphalt binder content appear as target value in the control chart.

Please enter Asphalt Compaction Details (number of blows/gyrations etc.) to appear on the generated pdf report.

Please enter the upper limit asphalt binder content value to appear as UCL in the control chart.

Please enter details of the type and grade of asphalt binder to appear on the generated pdf report.

Please enter the lower limit asphalt binder content value to appear as UCL in the control chart.

Asphalt Mix Production Control Charts

Please input the numerical values and dates in the following text boxes. Individual values shall be separated by commas. Dates shall be input in the format "YYYY-MM-DD" separated by commas. Its advised to mainain a .csv ot .txt file with the Asphalt production data to be copied and pasted in the relevant input boxes below. A sample txt file can be downloaded by clicking here.

Please enter the dates of asphalt production.

Please enter the Perc. asphalt binder content values corresponding to the dates of production.



ASPHALT MIX PRODUCTION CONTROL CHART - Perc. Asphalt Content



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