Getting measurements from Figure 11.20, determine approximate values of
the following items for plain concrete, concrete with 2% steel fibers, and concrete with 3% steel fibers:
a. Modulus of elasticity
b. Ultimate strength
c. Strain at failure
d. Toughness. Curves may be approximated with a series of straight lines.
e. Comment on the effects of increasing the steel fiber content on items a, b,
c, and d above.
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