Problem
1. What is a truly elastic material? Is concrete truly elastic? If not, why? Describe the various stages of microcracking when a concrete specimen is loaded to failure.
2. Draw a typical stress-strain curve for concrete. From this, how would you determine the dynamic modulus of elasticity and the different types of the static elastic moduli? Typically, what are their magnitudes for a medium-strength concrete?
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.