CalAC-Web

The following controls, located on the Design -> CalAC-Web Page, are used to perform a CalAC design.

CalAC-Web duplicates the behavior and results of the Caltrans desktop version of CalAC which implements the Caltrans R-value design method for rehabilitation projects. A CalAC design requires a Design Life of 20 years.

Section notes:

1.Shows the currently loaded CalME project

2.Shows the currently loaded CalME trial within the currently loaded project

3.Shows the current structure, as specified on the Project Information page

4.These controls allow you to define the current pavement condition

•IRI - the current IRI

•D80 (80% of Surface Deflection) - specify the D80 value, in mils

•Cracks wider than 1/8 inch - select if the current pavement condition has cracks wider than 1/8 inch

•PCC layer was Crack and Seated - select if this reflects the current condition

5.These controls allow you to define the parameters to be used for the CalAC design

•Depth of FDR - specify the depth of the FDR, in inches

•FDR-NS (PAB) Gravel Factor - specify this value

•FDR-FA (CFAC) Gravel Factor - specify this value

•FDR-PC Gravel Factor - specify this value

•UCS FDR-PC - specify the Unconfined Compressive Strength for the FDR-PC, in psi

6.Selecting the "Design" button performs a CalAC design. The results of the design are shown in the grid for the selected design strategy: each row is a design alternative. The thicknesses of each layer in the defined structure are given, as well as additional data items:

•Mill - thickness of old AC to be milled before overlay

•CIPR - cold in-place recycling layer thickness

•HRAC - hot recycled asphalt concrete thickness, also know as HIPR (hot in-place recycling)

•RPI - whether Rubberized Pavement Interlayer is used, also known as SAMI-R (Rubberized Stress Absorbing Membrane Interlayer)

•GPI - whether Geosynthetic Pavement Interlayer is used, also known as SAMI-F (Stress Absorbing Membrane Interlayer – Fabric)

•FDR-PC - layer thickness for full depth recycling with Portland cement

•FDR-FA - layer thickness for full depth recycling with foam asphalt

•PAB - layer thickness for pulverized aggregate base, also know as full depth recycling without stabilization

•AC GF - this is the AC gravel factor

•RES GE - this is the residual gravel equivalent

•Incr - grade increase

•Cost/mi - this is the cost per mile

•Msgs - this column will contain a button with a number indicating the number of messages associate with the design alternative. Clicking the button will display the messages in the pane to the right (section 7).

7.Shows the messages associated with a design alternative when the "Msgs" button is selected, if any

8.Selecting this button will display the Reports page so that you can select to generate a CalAC  report

The question mark in the blue circle in the upper-right of the control group allows you to get help on the controls (this topic).