7/29/2020 Topic: How to use the LET Stress-Strain Calculator thomas.potgieter@lonrix.com Administrator	The LET Stress-Strain Calculator allows you to perform assessments of the stress and strain in one or more pavements. The results of these analyses are exported to an Excel spreadsheet. The LET Stress-Strain calculator is accessed through the Design Tools icon on the Rubicon Toolbox Online Tools. Click on the Design Tools icon and select LET Stress-Strain Calculator from the list. A LET Stress-Strain Calculator page will open. To start, download the Example Template, enter the relevant data and save the template (load information, contact pressure, and positions of the load). All required inputs are entered through the template for this tool. Ensure all inputs are correct and save the template on your computer. Once you have clicked on OK, the outputs will automatically download to an Excel file confirming the calculation has run successfully. To view the results, open the downloaded Excel file. Since the template is saved on your PC, the analysis is not saved online. The analysis can be repeated, as and when required. edited by on 8/3/2020 edited by on 4/28/2021 edited by on 1/21/2023 edited by on 2/17/2023 edited by on 4/5/2023 edited by on 10/18/2023
8/24/2020 Topic: DEMAC Material Classification System (2009) thomas.potgieter@lonrix.com Administrator	The DEMAC Material Classification System tool determines the certainty that a material can be classified as a particular material class, based on the standard South African material classes. Getting Started The DEMAC Material Classification System Tool is accessed through the Design Tools icon on the Rubicon Toolbox Online Tools. Note, there are two versions (2009 and 2020) of this tool available for selection. Depending on which version was selected, the corresponding Materials Classification Report page will open. Click on the Design Tools icon and select DEMAC Materials Classification System from the list. A DEMAC Materials Classification System page will open. To start, download the Example Template, enter the relevant data and save the template. Follow the instructions provided to complete the Excel template. Test or indicator types should be selected from a drop-down list. Running the Analysis Once you have completed the template, proceed to complete the analysis. Reporting Once the report options have been set, the Materials Classification Report will generate and display on-screen. The report can be copied to the clipboard by right clicking on the report and selecting Copy image or Save image as. The image can then be inserted into a document of your choice (Word, Excel etc.). Since the template is saved on your PC, the analysis is not saved online. The analysis can be repeated, as and when required. edited by on 8/25/2020 edited by on 8/27/2020 edited by on 12/22/2020 edited by on 1/22/2023 edited by on 2/17/2023 edited by on 10/19/2023
8/27/2020 Topic: DEMAC Materials Classification System (2020) thomas.potgieter@lonrix.com Administrator	This version of the DEMAC Material Classification System includes the revised Technical Guidelines (TG2) for Bitumen Stabilised Materials (BSM's), released by SABITA in 2020. The guideline is available for download by SABITA. Getting Started The DEMAC Material Classification System Tool is accessed through the Design Tools icon on the Rubicon Toolbox Online Tools. Note, there are two versions (2009 and 2020) of this tool available for selection. Depending on which version was selected, the corresponding Materials Classification Report page will open. Click on the Design Tools icon and select DEMAC Materials Classification System from the list. A DEMAC Materials Classification System page will open. To start, download the Example Template, enter the relevant data and save the template. Follow the instructions provided to complete the Excel template. Test or indicator types should be selected from a drop-down list. Running the Analysis Once you have completed the template, proceed to complete the analysis. Reporting Once the report options have been set, the Materials Classification Report will generate and display on-screen. The report can be copied to the clipboard by right clicking on the report and selecting Copy image or Save image as. The image can then be inserted into a document of your choice (Word, Excel etc.). Since the template is saved on your PC, the analysis is not saved online. The analysis can be repeated, as and when required. edited by on 8/28/2020 edited by on 12/22/2020 edited by on 1/22/2023 edited by on 2/17/2023 edited by on 10/19/2023
10/1/2020 Topic: How to use the Automated Backcalculation Tool thomas.potgieter@lonrix.com Administrator	The Automated Backcalculation Deflection Tool allows for the automated backcalculation of layer stiffnesses from Falling Weight Deflectometer (FWD) data. This tool also incorporates built-in reporting and statistical analysis features. Getting Started The Automated Backcalculation Deflection Tool is accessed through the Deflection Analysis icon on the Rubicon Toolbox Online Tools. If this is the first time you are using the Online Tools, you will need to set up a project by clicking on the Manage Projects link and create a new project. Alternatively, you can use an existing project if one has already been created. Once you have created a new project or selected an existing project, click on the Deflection Analysis icon and select Automated Backcalc from the list. An Automated Backcalculation analysis page will open. To start, download the example template, enter the relevant data and save the template. The Excel Template contains sheets for Data, Thickness, Interpretation and Notes. The template needs to be completed exactly as indicated, detailed notes are provided within the template as guidance. The extract from the Data sheet shows the sensor positions, D0, D200 etc. These offset positions are the positions of the actual sensors, and can be changed to suit your sensor positions. If you have more than 9 sensors, you can add more columns and the software will stop reading when an empty column is read. The software reads these headings to obtain the sensor positions. It is therefore imperative to check that the number of sensors and offsets represent the actual configuration used during testing. The Thickness sheet makes provision for 5 layers (including the Upper Subgrade; excluding the semi-infinite Lower Subgrade). Note that the number of layers defined at each Station must be the same throughout. As indicated in the steps to follow, the online module will prompt you to select an appropriate sheet to use. You may therefore create more than one thickness sheet option, e.g. Thickness (2), which may be used for running different layer configuration setups using the same input file. Remember to adjust or create an interpretation sheet with the same number of layers as defined in the new thickness setup if used. Running the Analysis Once you have completed the template, proceed to complete the analysis. The default average error per sensor is 10%. A lower value can be selected and will increase the running time. All deflection points will be analysed if the default station range at the bottom of the window is left unchanged. You can, however, analyse only a section by selecting the begin and end stations under consideration e.g. matching a uniform section, or to speed up running time if the focus is on a shorter section. Thicknesses are ignored (thickness setting options inactive) if you imported layer thicknesses as part of the data selection process i.e. if you selected the Thicknesses sheet, from the template. If you selected Not Applicable for your Thicknesses, the thickness settings options will become active and you will be able to manually add or delete layers and populate the thickness column. Once your backcalculation run has completed, the results will display on-screen in a table format. Note, for a new analysis, the Save option is initially inactive. Once an analysis is saved for the first time, the save option becomes active. For overwriting an existing saved analysis, click on Save. To save as an alternative analysis, click on Save As. Alternatively you can clone your analysis, from the Online Tools page, and rename it as needed. Reporting The report can be copied to the clipboard by right clicking on the report and selecting Copy image or Save image as. The image can then be inserted into a document of your choice (Word, Excel etc.). Statistical Summary The statistical summary can be copied to the clipboard by right clicking on the summary and selecting Copy image or Save image as. The image can then be inserted into a document of your choice (Word, Excel etc.) edited by on 10/8/2020 edited by on 11/20/2020 edited by on 12/10/2020 edited by on 12/11/2020 edited by on 12/24/2020 edited by on 7/16/2021 edited by on 3/21/2023 edited by on 10/20/2023
12/8/2020 Topic: How to use the AASHTO 1986 Design Tool thomas.potgieter@lonrix.com Administrator	The AASHTO 1986 Design Method tool allows you to evaluate the pavement's structural capacity using the AASHTO design method as documented in the 1986 AASHTO Design Guidelines. Although this method is now outdated, it still provides a useful check to ensure that your pavement's structural capacity is roughly in line with empirical observations recorded under controlled conditions. Getting Started The AASHTO 1986 Design Method Tool is accessed through the Design Tools icon on the Rubicon Toolbox Online Tools. If this is the first time you are using the Online Tools, you will need to set up a project by clicking on Manage Projects and create a new project. Alternatively, you can use an existing project if one has already been created. Defining the Pavement Structure Before you use the AASHTO design tool, you will need to define your pavement structure. The Pavement Layer selection in the first column represents one of three standard conversions from the E-modulus entered to Layer Coefficient used in the AASHTO method to calculate Structural Number (SN). The standard model provides for three layers, but more layers may be added (bottom right). In such cases, however, an assumption on the pavement layer material/ conversion function will have to be made that closest resembles the situation. A sensitivity analysis may also be performed. The Subgrade Layer is handled separately from other pavement layers and the method makes provision for using subgrade stiffness values representing different seasons (where available). Analysis and Reporting Once you have defined the pavement structure, input the relevant indices information and click on Calculate to generate the analysis report. Note, for a new analysis, the Save option is initially inactive. Once an analysis is saved for the first time using Save As, the save option becomes active. To overwrite an existing saved analysis, click on Save. To save as an alternative analysis, click on Save As. Alternatively, you can clone your analysis, from the Online Tools page, and rename it as needed. The report can be copied to the clipboard by right clicking on the report and selecting Copy image or Save image as. The image can then be inserted into a document of your choice (Word, Excel etc.). edited by on 12/8/2020 edited by on 3/18/2021 edited by on 1/22/2023 edited by on 8/25/2023

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