As an aside, wind resistance and the change in potential energy due to the vehicle dropping into the bed were neglected. It was assumed that the accelerator was off once the vehicles entered the arrestor bed.
Using these calculations, we chose three different densities of concrete to test so we had to consult our concrete team about approximate air percentage mixtures. More importantly, we needed to know how those percentages correlate to our desired compressive strengths, and what that translates to in terms of cure, or solidifying, time.
Another big factor we had to deal with was a seven-day cure time, which is significantly shorter than a regular concrete pour. This means that you have to approximate what the strength of the concrete will be mid-cure.
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