Concrete as a construction material
What Is Concrete Used For? Construction Material Art Work
Concrete Bench made by 8 th grade students
Question What other concrete products and applications can you think of ?
Why Is Concrete Used? Economics –Inexpensive, readily available Material Properties –Long Lasting –Molded into a desired shape –Great insulator –Hard
Material Properties (cont.) Great Compressive Strength (up to 8000 psi) Poor Tensile Strength (almost 0) –Reinforcement methods ($)
Question What is the difference between tension and compression?
Question Why would concrete ever be used in tension?
Why Do We Reinforce Concrete? Prevent cracking due to tension forces
How Do We Reinforce Concrete? Steel rebar –Excellent in tension, poor in compression Chicken Wire –Minimize thermal expansion
Pictures Failed concrete structures due to earth quakes