QEST Platform 5.2 Documentation
Applies to QESTLab

There are a number of elements common to every sand equivalent test in QESTLab. This article describes the functionality of these elements. For differences between specific standards or test method bodies please refer to the article specific to that test method or standards body.

Worksheet Layout

QESTLab worksheets for this test type are laid out in the following manner.

The test screen consists of four sections.

Method -is where the preparation and shaking methods can be selected from drop-down menus.
Equipment - is where equipment used to perform the test can be selected from drop-down menus.
Measurements - is where data entry for the test is performed. The calculated sand equivalent for each trial is also shown in this section.
Result - shows the calculated average sand equivalent %, and a checkbox allows the result to be reported.

More detail on some of the sections is described below.

Equipment

All equipment used for the given test is selected in the Equipment section of the worksheet. The following equipment can be selected on the worksheet:

Equipment label	Qest ID	Notes
Mechanical Shaker	30040	Only available when the Shaking Method is Mechanical.
Manual Shaker	30041	Only available when the Shaking Method is Manual.
Oven	30004	Only available when the Sample Preparation Method is Referee.

Measurements

Data is entered from top-to-bottom, and one trial at a time. If the results of the first two trials differ too much, a third trial may be performed.

Unusual Conditions Checkbox

On some variants of the test, the Unusual Conditions checkbox may be checked. This may be used when the sample conditions do not allow a reading within the usual sedimentation time, such as when the sample contains small amounts of ultra-fine particles.

When checked, the Clay Column and Time fields become available for each trial, allowing additional sedimentation time to be recorded.

Result

The Sand Equivalent percentage for each trial is calculated as the sand reading value divided by the clay reading value.

The Average Sand Equivalent percentage is calculated as the mean of the same sand equivalent values of each trial.

Bulk Entry

The bulk entry for this worksheet shows calculated results only.

Reporting

The results from this worksheet can be reported on an Aggregate/Soil Test Report (if required).

Test Methods

Differences from or additional functionality to that described above are captured in the following articles.

NZS 4407 Test 3.6: Sand Equivalent

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