Corner Wall Repair

 

DESCRIPTION
Two sets of composite samples were received for tensile testing in accordance with ACI 440.3R-04.

MECHANICAL
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)

Sample Dimensions
(in)
Ultimate Strength (psi) Modulus
(ksi)
Failure
Strain
1 0.944 x
0.0470
44200 29400 0.016
2 0.988 x
0.0418
53800 40800 0.014
3 0.988 x
0.0395
32700 36400 0.01
4 0.971 x
0.0358
63900 44200 0.015
5 1.098 x
0.0466
51700 36500 0.015
Average -- 49260 37460 0.014
St. Dev. -- 11600 5560 0.002


RESULTS
All samples far exceeded necessary strength to support walls.