Laboratory

Nottingham Asphalt Tester

Research by Brown and Cooper in the early 1990’s at Nottingham University led to the development of the Nottingham Asphalt Tester (NAT). The NAT‘s load is applied pneumatically versus the more expensive hydraulic systems.

We have recently upgraded the NAT to a C.R.T. NU-14 asphalt tester. Amongst the tests that can be performed is the Dynamic Creep and stiffness modules (I.T.T.) tests. Furthermore we can now offer Fatigue testing in the I.T.T. mode, either at constant stress or constant strain - without load reversal.

Polished Stone Value

We are operating an ELE Polished Stone Value tester and its associated British Pendulum tester. The PSV machine belongs to the University of Pretoria ,but SRT East operates it commercially on the basis of supplying data to the University for research purposes. This is subject to our clients’ confidentiality criteria.

The SABS 848 / BS812 test methods are used.

By supplying accurate and timeous results the test has become much more widely used.


Images from the SRT East Laboratory

Troxler Superpave Gyratory Compactor

Superpave has left its mark on South Africa with the introduction of the Troxler Superpave Gyratory Compactor in 1996. Having one of only four in the country places our laboratory in a good position to offer a complete service to our clients.

At present, the new S.A hot-mix design method requires that a compactive effort to 300 gyrations be used. This is to simulate the air voids left in the layer at the end of the design life, in cases when extraordinary high traffic loading, beyond the normal, takes place.

Binder Testing

Our Laboratory is equipped and experienced in performing the complete range of binder tests to SABS 307 bitumen specification.

All the specified modified binder tests, according to the new AsAc TG1 guidelines, can be performed.

SANS 309 and SANS 548 bitumen emulsion tests can be performed by our laboratory. With having a laboratory emulsion mill we are able to assist our clients in their R&D needs in this regard.

We can now also test to SANS 308 (cutback bitumen primes) as well as precoating fluids and emulsion primes.

Asphalt Tests

With our trained and experienced staff and extensive range of equipment we are well positioned to perform asphalt mix designs and a large number of tests. Our area of expertise ranges from asphalt designs for major highways to slurry designs.

Aggregate Tests

An extensive range of aggregate tests can be performed by us and this is further augmented by our association with Soilco Materials Investigations.

Emulsion and Foam Stabilised Bases

We are able to do emulsion stabilised base designs as per the SABITA Manual 14 and the SABITA Manual 21 as well as As Ac tgz requirements through our association with Soilco Materials Investigations.