December 2024
In our Civil Engineering & Architecture class, we explored the properties of concrete and its countless applications. Then came the hands-on part: creating our own concrete mixes and testing them in the lab.
We were provided with cement, sand, various aggregates, and water. With our own concrete “recipes” ready to go, we measured out the ingredients, mixed up our batches, and poured them into PVC pipe molds. Next step: waiting three long weeks for them to cure.
Once cured, we removed the casts and put our samples through compression testing to determine their maximum strength. My sample failed at 3,000 psi, falling short of our teacher’s benchmark of 4,500 psi.
Here’s what I learned from the experience:
- This isn’t pancake batter. The mix doesn’t need to be overly liquid.
- Hold your temptation to add water. Water is not your friend.
- Don’t skimp on aggregates. They add crucial strength.
- Mix thoroughly. Homogeneity is key.
- Compact well. Air pockets ruin everything, and lowers your final grade.
Concrete may seem simple, but it’s all about precision, patience, and resisting the temptation to “eyeball it.”
Berk @Nisky 