Recently the Australian standard for soaked CBR determination has changed. The aim of the change to the standard is to make the results more repeatable and less susceptible to moisture variations within the laboratory. Curing times of samples have also been specified both prior to performing the Maximum Dry Density, and the remoulding of the CBR test specimen.
Curing times are now dependent on the liquid limit of the sample being tested. Subsequently, laboratory turn around times would be as follows:
Liquid limit
Previous turn around time
Current turn around time
0%-35%
10 days
14 days (additional 4 days)
35%-50%
10 days
18 days (additional 8 days)
50%-
10 days
24 days (additional 14 days)
Basically this means that every CBR sample now requires a liquid limit test to be carried out on the sample, at an additional charge. We will need more lead-in time to complete projects by your desired deadline. As a general guide you can typically add 2.5-3 weeks onto the laboratory turn around times to determine the report delivery date from the date that you engage us to carry out the services.
We apologies for any inconvenience that this change may have and we will work with you as best we can to meet and exceed your expectations.
If you have any questions regarding the above please don’t hesitate to contact our office.
