Establishing the effect of abrasion erosion on Concrete Canvas®
The abrasion resistance of CC was compared to the standard mix ST4 to BS 8500-2. ST4 is a poured concrete commonly specified for channel lining works in the UK with a 28 compressive strength of 20N/mm2.
Two variants of the ST4 mix were tested – S2, a low slump class, and S4, a high slump class – against the 8mm variant of CC (CC8™).
The test compared the abrasion resistance of each material over three timeframes. The first test, 24 hours into curing time (during which time CC reaches 80% strength); the second, 7 days into curing time; and the third, 28 days into curing time (the typical curing time for ST4).
The testing was based on ASTM C1353 ‘Test Method Using Taber Abraser for Abrasion Resistance’ and involved placing material samples under an abrasive rotating wheel. The depth of wear is recorded every 1000 revolutions (cycles), up to a total of 8000 cycles.
The lower the depth of wear, the better the abrasion resistance of the material.