Peter Rassloff Instruments & Services (Cape) CC.

 PRIS Cement Instruments


Tel: +27 (0)11 425 1151 /  +27 (0)11 425 3948

+27 (0)11 425 1839 

Roaming Cell: 

+27 (0)82 4666 469 Maria


We have relocated our Cape Town offices and are now only working from our Johannesburg office



Fly Ash Apparatus: Micro Sieving


A major requirement for Fly Ash isconsistency of fineness. Two test methods are described. EN 451 requires fineness to bedetermined using a wet sieving technique and a 45μm sieve, this is the definitive method. A quick yet accurate method for daily production control has been developed using vacuum sieving and a 45 μm sieve mesh. This technique has the advantage of speed and can readily be correlated to the reference method.

Air Jet Apparatus


Vacuum Sieving Apparatus for residues of below 90 microns (Replaces “wet” sieving method). Uses 200 mm round standard sieves. Fast and accurate.


86 Pretoria road, Rynfield, Block 1,
Benoni, 1501