This is my guide and technique for making Olympic concrete barbell weights. I cover steps in here about pouring the concrete and extracting the plates. Specs and details of how to construct the forms are included in the ebook in the link below.
EBOOK: payhip.com/b/E7df
Also visit the website to see more:
Concretegainz.com
The concrete used is Quickrete premixed concrete. It already contains pre-measured amounts of gravel, sand and Portland cement and fiber glass. This is what I recommend to use. I also have used steel rebar in some of the earlier sets and have concluded that steel remesh is just as good but a lot cheaper.
I've made over a 100 sets of these weights and have not had any of my personal plates or plates I've sold break. This is with normal care and controlled lifts onto a suitable exercise surface, (i.e. dense foam exercise mats or outside ground etc). Dropping or slamming these plates onto a rock hard surface will most likely result in a break or crack but normal controlled use of these plates will result in them working just fine and getting a great workout!
Music:
Bensound.com
"Endless Motion"