Why is Batch Testing So Important?
Batch testing ensures quality control, allowing the lab to confirm that every bag of Renovation Plaster is formulated to a high standard and performs equally well across the board.
A retain sample is taken from every single batch of Renovation Plaster the factory produces, which is bagged, dated and held in reserve for future reference. A second sample is then used to test for quality assurance.
The Renovation Plaster and water are added to a Hobart mixing bowl at a ratio of 2:1 and mixed for a total of 1 minute 30 seconds, increasing the speed after 1 minute.
Testing for Workability
The mixture is applied to a flow table to test for the natural spread of the batch. In the images, we can see Anne adding the mixture to a truncated conical mould on the flow table and compacting it to ensure uniform mould filling. The mould is then removed.
Anne then turns a manual handle on the flow table, causing it to both rotate and move up and down, this allowing the mixture to spread. The spread is then measured and recorded.
Testing for Density
The mixture is then transferred to a cylindrical bowl and compacted to ensure uniform filling. A palette knife is used to skim off any excess mix. The mixture is then weighed and the results recorded.