Students learn about the importance of water in concrete making in Nebraska Concrete & Aggregates Association's Concrete 101 program.
Some students have to pack their beams because of how much water they added to the mix.
Each student writes their name on their beam.
Once the concrete has been placed in the molds, they are stored for one week.
After a one-week cure time, the beams are tested using a bucket.
Students add 1/2-in. rebar to the bucket until the beam breaks.
Program volunteers record the total water and the amount of weight it takes to break each beam.
This pair shows off their concrete beam.
After 17 years, NC&AA has learned that fifth graders love to make a mess, break things, and most of all, concrete.