Two sets of composite samples were received for tensile testing in accordance with ACI 440.3R-04.
All samples were conditioned for a minimum of 40 hours at 20 ± 3°C and 50 ± 5% relative humidity. All samples were tested in similar conditions. Five samples were received for tensile testing in accordance with ACI 440.3R- 04 which in turn referred to ASTM D3039. The samples were tested in the as-received condition. After recieving the samples, it was noted that the specimens had uneven and jagged gage sections. Some of the samples showed signs of voids within the weave of the material. The samples were tested on a servo-hydraulic test stand at a crosshead speed of 0.05 millimeters per second.
The sample results are presented in Table 01.
Table 01 (Tensile Results)
|Ultimate Strength (psi)||Modulus
All samples far exceeded necessary strength to support walls.