Applies to QESTField

This article describes how to use the CBR by Plate Test workflow, which is based on an in-house variant of BS 1377-9:1990 Clause 4.1.

Overview

The CBR by Plate Test workflow can be used to determine equivalent CBR values of in-situ soils. It is based on the methodology of the Plate Loading Test (BS 1377-9:1990 Clause 4.1) but has been modified to only provide equivalent CBR values.

This article provides information on how the various choices available within the QESTField version of this test method provide the required pathways to deal with the variations within the test.

What is an “In-House Method”?

This test is carried out by many construction materials testing organizations throughout the UK but does not have a test method defined by the British Standards Institute or the European Committee for Standardisation.
By default, the QEST Platform assigns the test method name of this method to be “In-House Method” and leaves the revision year blank.
A customized test method number, and revision year, to match an organization’s internal documentation can be provided for in-house methods.
Please contact Spectra QEST for this configuration.

Data Entry

The workflow contains the following phases:

SD (Default)
CPL

SD Phase - Sample Data

The QESTField version of the CBR by plate test shares many common features with other QESTField tests.

This phase contains three sections:

Setup

This section displays a default setting for the location type that can be edited by clicking on the Change button.

Test & Material Details

This section provides fields for entering general information about the material tested.

Test Location

The appearance of this section is controlled by the choice of the location type made in the Setup section. These features are explained in the workflow Setup Section page.

CPL Phase - CBR by Plate Loading

CBR by Plate Loading Test data entry.
This phase uses the QEST Web App version of the test, that is, the CBR by Plate Loading worksheet.
Details applying to this phase can be found on the worksheet documentation page.

QEST Platform 5.7 Documentation

CBR by Plate Test [UK In-House Method] Workflow

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