Material Properties

A Tegula tile is a high performance product that utilizes industrial-grade properties of its primary constituent material, aluminum oxide (alumina). Alumina is a high strength, high temperature ceramic that has outstanding resistance to aggressively degrading environments. The process used to fabricate a Tegula tile introduces an interlocking bonding mechanism that serves to further enhance the superior material properties of the alumina. Ultimately, a Tegula product will perform at an exceedingly high standard.

NYS DOT Approved

Tegula samples revealed properties that far exceed New York State Department of Transportation (NYS DOT) specifications. As part of the NYS DOT qualifications for embedded warning tiles, products are evaluated for compressive strength (i.e. people walking over the tile) and freeze-thaw damage resistance (i.e. winter precipitation cycling that causes significant stresses and cracking. From both DOT analyses and academic laboratory testing, Tegula tiles revealed strength approximately twice that of high strength concrete and freeze-thaw weight loss less than 0.03% of the original weight. As a reference, the NYS DOT minimum standard for the freeze-thaw evaluation is a weight loss than 1% of the original tile weight.

Compressive Strength (ASTM C1424):

Average | MPa = 107 | psi = 15500

Bulk Properties:

Density ~ 3.04 g/cm^ 3

Apparent porosity in volume % ~ 19.50%

Water absorption in weight % (ASTM C373) ~ 6.4%

Freeze-thaw cycling (ASTM C1026): 5 samples tested over 80 cycles

Degradation evaluated in terms of weight % lost in sample due to expansive/cracking/fall-out of material

For the 1st 30 cycles, .02% loss measured

Similar results revealed through 83rd cycle

4 Point Bending Strength/Modus of Rupture (ASTM C648):

Average | MPa = 46.01 | psi = 6672