I do a lot of projects myself, start to finish. Like decks. Now I'm doing a porch 8 feet off the ground. One thing I've always done is use Quickcrete 80 lb bags to fill the Sonotubes as the footers. Years ago, I started buying a bag of Portland cement and adding a shovel to each bag as I mixed it thinking that would make it stronger.
Am I right that this improves the strength of the concrete or not? Thought I would post this here in case someone might know.