Re: Mortar mix becomes concrete?
I wouldn't necessarily make it into mud pies. If this project is that critical then going with standard concrete may be your best bet but that's not to say you couldn't add aggregate to the mortar and use it for smaller projects. Concrete is portland cement, lime and sand. Concrete is portland cement, sand and aggregate. Sometime lime is added to cement depending upon temp so adding aggregate to mortar will in fact give you a close proximity to concrete. Yes, the purists will argue that they use "different sand" and stuff like that but in the end, it's the same ingredients for the binder in each. If you want a higher compression strength just add some more portland to the mortar as mortar typically has a higher sand to cement ratio.
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