For This Project we tested the durability, and stability of concrete based off the type, and way the concrete was made. For our group our concrete was going to have a compression test, but for other groups they had tension tests. Our concrete was a mixture of 9 rebar pieces, 2.75 pounds concrete, and 200 mL of water, which was one of the least dense mixtures out of all the groups. The goal of the project was to see how different mixtures of concrete effected the durability of the concrete.
After mixing the concrete, we put 9 bars of steel rebar inside two forms and poured in concrete when finished. After letting the concrete harden and dry overnight, we came back the next day to experiment. The concrete would have to withstand compression force in the pneumatic press. When we tested the regular pour equaled 600 PSI, no air bubbles equaled 900 PSI, and rebar equaled 900 PSI. I thought that are results were pretty good for having one of the least denser concrete mixtures. The results proved that air bubbles in concrete make it weaker, and that rebar is much stronger than regular concrete. I thought that this was a fun informative project to learn the properties of conrete.