UC Berkeley Construction class project required our own concrete mix formula, span 30", and weigh under 150 lbs. In the early stages of the project, we experimented with 8 different mixtures, including different aggregates to potentially lighten the weight of the project, and differing the proportions of sand , cement, and aggregate. With extreme attention to the reinforcement detail, our group had the lightest project (50 lbs), with the thinnest section (2") out of the 60 students in the class.
Location: Berkeley, CA, US
My Role: Co-Designer
Additional Credits: Julio Gutierrez, Austin McNaughton