115


 The sulfur capped cylinders were tested on the same day as the piles using a

cylinder tester. Table 6-2 contains the results from the cylinder tests.

 Table 6-3 contains the physical and mechanical properties of the CFRP

reinforcement of the spun cast piles. The physical and mechanical properties of the CFRP

flexural reinforcement were obtained from the manufacturer (Hughes 2002(b); Hughes

2004; Hughes 2005) while the properties of the CFRP grid were determined through

tensile tests on the grid strands. More details on the grid strand tests can be found in

chapter 3.

Table 6-2. Cylinders test results
Specimen Cylinder Peak Average
 stress peak stress
 (ksi) (ksi)
 SCC1 1 6.49 6.50
 2 6.50
 SCG1 1 6.67 6.57
 2 6.47
 SCC2 1 6.99 6.95
 2 6.91
 SCG2 1 5.57 5.57
 2 5.56
 SCC3 1 6.26 6.10
 2 5.94
 SCG3 1 6.98 7.01
 2 7.03


laple 6-3. r reinforcement material properties
Type Dia. Area Tensile Modulus Elongation
 (in.) (in2) strength (ksi) at rupture
 (ksi) (%)
 Carbon Rod 0.254 0.0464 400 22000 1.80
 Carbon Rod 0.362 0.1010 300 19700 1.45
 Carbon Grid N/A 0.0097 100 9200 1.05

 Results and Observations

 Specimens SCC1, SCC2 and SCC3 were cracked before testing due to self weight

such that they do not show the high linear initial slope (see Fig 6-25). Their calculated


,,, ,