Bought a bag of Hanson Instant Concrete t'other day to repair a step, it worked very well but left me a little confused.
Very fine powder with what felt like 'flakes' of aggregate - certainly nothing like as large as pea shingle. I expected a mixture of cement, sand and a coarse aggregate. This felt more like post crete/fix.
The blurb on the bag claims its stronger than normal concrete, but I though concrete gained much of it strength from the aggregate?