Accelerated wear testing using the Taber Abraser assists stone suppliers to evaluate the durability of stone used as floor surfaces.
The durability and wear resistance of stone is an important design consideration of a new floor to ensure that it stands the test of time. When the centre of the steps in an old set of stairs becomes dished, this is due to the stone wearing or eroding away over time from hundreds of thousands of people scuffing the surface.
While there are no specific Australian Standards for abrasion resistance of dimensional stone, the American Society for Testing and Materials (ASTM) provides an accelerated wear test to determine the resistance to wear.
This procedure is outlined in ASTM C1353 Standard Test Method Using the Taber Abraser for Abrasion Resistance of Dimension Stone Subjected to Foot Traffic.
During this test, a sample of the stone is affixed to the base of the Taber Abraser which is rotated against abrasive calibrade wheels that apply a specified force.
The abrasion resistance or index is determined by the volume loss of the stone that has been subjected to the accelerated wear. By determining the density of the stone, the volume loss is calculated by the change in mass due to the Taber Abrasion.
Floor surfaces that require a high resistance to abrasion should achieve an abrasion index greater than 25. This can generally be achieved quite easily with hard stones such as granite, however soft stones such as limestone, sandstone and marble require more rigorous testing to assess the propensity of the material to wear away.
Safe Environments assist in assessing the wear resistance of stone by conducting accelerated wear tests using the Taber Abraser, ensuring that the stone floor is durable and fit for purpose.