Performance-Related Specifications for Pcc Pavements. Volume Iv: Appendix G-Pavespec 2.0 User Guide

After a specification has been defined, and the corresponding preconstruction output has been generated, the specification may then be used to accept as-constructed JPCP lots.  Actual AQC data may be entered into PaveSpec using the program’s Use Specification section.  This chapter describes all aspects of the Use Specification section of the program, including entering actual AQC field data, generating and viewing PRS lot pay factors and pay adjustments, and viewing project summary reports.

Creating and Editing Use Specification Documents

Each Use Specification document is developed in reference to a previously simulated specification.  A new Use Specification document may be created using one of the following three methods:

1. Select the Specification document of interest in the Specifications tab of the Database Control dialogue box, then select Use Specification from the File menu.

2. Select the Specification document of interest in the Specifications tab of the Database Control dialogue box, then click on the  toolbar button.

3. Select a previously defined Use Specification document under the same specification (contained in the Specifications tab of the Database Control dialogue box), then click on the  button.

An existing Use Specification document may be edited using one of the following methods:

1. Select the Use Specification document of interest in the Specifications tab of the Database Control dialogue box, then select Setup from the File menu.

2. Select the Use Specification document of interest in the Specifications tab of the Database Control dialogue box, then click on the  toolbar button.

3. Select the Use Specification document of interest in the Specifications tab of the Database Control dialogue box, then click on the  button.

Use Specification Main Screen

When you create a new Use Specification document, the dialogue box shown in figure 33 will appear.  This dialogue box consists of two parts: a Name input box and a project summary area.

Figure 33.  Example of the Use Specification document main screen.

You may change the name of the Use Specification document by entering a new name in the Name input box.  The name you enter will show up as the Use Specification document name in the Specifications tab of the Database Control dialogue box.

The project summary area contains general information about the user-defined as-constructed lots.  This information consists of the lot number, paving date, starting and ending stations, computed lot length, and the number of sublots contained in each lot.  When you first begin to create a new Use Specification document, this area will be blank (as shown in figure 33).

Finally, you must also enter the actual Contractor Unit Bid Price (note that a selected average bid price was used to develop the specification) and final Lot Width to be used in determining the actual contractor pay adjustments.  Although the lot width is defined in the specification development steps, the actual value used for computing pay adjustments is required here to avoid any confusion.

Creating a New Lot

To define a new lot in an open Use Specification document, click on the  button.  This action will add a new lot to the end of the list in the project summary area. Clicking on the  button will also bring up the View/Edit Lot dialogue box.

Editing an Existing Lot

To edit an existing lot, first select the lot in the project summary area, then click the  button.  This action will activate the View/Edit Lot dialogue box. (Note that double-clicking on a lot description will also bring up the View/Edit Lot dialogue box.)

Deleting an Existing Lot

To delete an existing lot, first select the lot in the project summary area.  Next, click the  button.  This action will remove the selected lot from the list in the project summary area.

Entering Actual Lot Information

Actual AQC field data are entered into PaveSpec using the View/Edit Lot dialogue box.  This dialogue can contain up to three different tabs: Lot Information, Samples (Level 1), and Samples (Level 2).  The Samples (Level 2) tab will only be available if you chose to simulate a Level 1 and Level 2 specification at the same time.  (Note: The input fields under the Samples (Level 1) and Samples (Level 2) tabs are identical.)  An example of the View/Edit Lot dialogue box is presented in figure 34.

Figure 34.  Example of the View/Edit Lot dialogue box.

General Lot Information

When you are creating or editing a lot, the general lot information is contained in the Lot Information tab of the View/Edit Lot dialogue box.  The inputs defined within this tab are used to describe the lot in the project summary area of the Use Specification document main screen.

When you choose to create a new lot, the default lot Name will automatically be set to the next consecutive lot number (i.e., if the previous new lot name was Lot 4, the next new default lot Name will be Lot 5).   You can rename the lots if you choose to do so.

The Start Station, End Station, and Lot Length inputs all have default metric units of "m" and default English units of "ft".  Note: For the Lot Length, you may toggle between metric and English units using the " ` " key.

Obviously, you will not know the final Number of Sublots prior to the paving of a lot; therefore, when defining a new lot, you should input your best estimate of the number of sublots expected to be included in that lot.

Actual AQC Sampling and Testing Data

Actual Level 1 and Level 2 AQC sampling and testing data are input for Level 1 and Level 2 specifications in the Samples (Level 1) and Samples (Level 2) tabs, respectively.  If you are creating a new lot, the Level 1 or Level 2 sample input tab would appear mostly blank, as shown in figure 35.

Figure 35.  Example of a Samples tab in the View/Edit Lot dialogue box.

These tabs allow you to enter AQC sampling and testing data for all the user-chosen AQC’s.  Clicking on the buttons across the top of the data input screen (labeled by AQC name) allows you to toggle between data input screens for each chosen AQC.

Prebuilding a Sample List

The easiest means of getting started entering actual field data is by using the Prebuild List on each AQC data input screen.  As mentioned previously, when you are defining an actual lot for the first time, the sample list within each AQC data input screen will be blank.  You can prebuild an AQC sample list that reflects your choices for the estimated number of sublots per lot and the previously chosen AQC sampling and testing plan.  For example, if you had estimated four sublots per lot, and you defined your strength sampling plan to include five strength samples per sublot, then the strength sample list would be prebuilt to include 4 * 5 = 20 samples.

To use the Prebuild List option, simply click on the  button on the AQC data input screen.  Use the vertical scroll bar to view the complete list of samples.  An example of the View/Edit dialogue box showing a prebuilt list is shown in figure 36.

Figure 36.  Example of a prebuilt list in the View/Edit Lot dialogue box.

When you use the Prebuild List command, PaveSpec assigns default sample ID’s to each of the AQC samples.  Each default ID is made up of the following parts:

• AQC Sample Type Code—The first few characters of the default sample ID designate the AQC sample type (i.e., Strn = strength, Thk = thickness, Air = air content, Smth = initial smoothness, and Cons = percent consolidation around dowels).

• Sublot Number—The number following the AQC sample type code designates the corresponding sublot (e.g., the sample ID of "Strn1a2" represents sublot 1).

• Sample Location—The letter following the AQC sublot number designates the sample location within the sublot (e.g., the sample ID of "Strn1a2" represents sample location "a" within sublot 1).

• Replicate Number—The last number in the default ID represents the sample replicate number at the chosen sample location (e.g., the sample ID of "Strn1a2" represents replicate "2" at sample location "a").

Adding a Sample Manually

Instead of using the Prebuild List option, you may choose to input the AQC sample information manually (one sample at a time).  To insert one new AQC sample at the end of the current AQC sample list, click on the  button on the chosen AQC data input screen.  This function may be used to create a new sample list or to add samples to an existing list.

Deleting a Sample

To delete an AQC sample, first select the sample by clicking on it in the AQC sample list.  Then click the  button.

Defining Sample Characteristics

AQC sample characteristics are defined using the input fields grouped into the Sample Information area of the AQC data input screens.   To change the characteristics defining an AQC sample, first select the sample from the AQC sample list.  The currently defined sample characteristics will be reflected in the data input fields in the sample information area.  The different AQC sample characteristics are defined below:

Sample ID

The sample ID is used to differentiate between samples.   It consists of any combination of letters and numbers unique to one sample.

Sublot

The Sublot input is used to define the sublot from which the current sample was taken.  You may define the sublot in terms of any combination of numbers or letters.

Location

The Location input box is used to identify the location of the current sample.  This input is typically defined as the longitudinal station number where the sample was taken; however, any appropriate description may be used to define the sample location.

Status

The Status list box identifies how the current sample is to be used by PaveSpec in the computation of the lot pay factor.  The three different status types are defined as follows:

• Open—This is the default status of any new sample.  These samples will not be used in the computation of the lot pay factor.

• Accept—Those samples that are assumed to be "good" samples (and, therefore, chosen to be used for acceptance) should be changed to the Accept status.  Only those samples showing a sample status of Accept will be used by PaveSpec in the computation of lot pay factors.

• Reject—Any sample values that are chosen to be excluded from the acceptance procedure shall be marked with a status of Reject.  Rejected samples will not be used in the computation of lot pay factors.

Value

The measured field value for the current AQC sample is input into the Value box.  Acceptable units for each AQC are as follows:

• Concrete Strength—Metric values are expressed in terms of "MPa", while English values are in terms of "psi".

• Slab Thickness—Acceptable metric abbreviations include "mm" and the default units of "cm", whereas English values are expressed in terms of "in".

• Air Content—Default units for this field are "%".

• Initial Smoothness—Metric values are expressed in terms of "mm/km", while English values are in terms of "in/mi".

• Percent Consolidation Around Dowels—Default units for this field are "%".

Maturity

The Maturity input box is only available within the strength AQC data input screen, and is only required when strength testing is conducted at less than 28 days of age.  When appropriate, the sample maturity at the time of testing may be recorded in this input box.  Metric values for the Maturity input box are "ºC-hrs", while English values are expressed in terms of "ºF-hrs".

Comment

Finally, a text input box is provided to allow you to type a comment corresponding to a particular sample value.

Exiting the View/Edit Lot Dialogue Box

When you are finished defining sample data for the current lot, click on the  button to save your changes.  If you would like to exit the View/Edit Lot dialogue box without saving your changes, click on the  button.   Clicking either button will return you to the Use Specification document main window.

Saving a Use Specification Document

Once you are finished making changes or defining a new Use Specification document, click on the  button to save your named document.   If you would like to exit the Use Specification Document without saving your changes, click on the  button.  Clicking either button will return you to the PaveSpec main window.