Expanding mortar concrete demolition
Expanding mortar concrete demolition
(OP)
Has anyone used expanding mortar for concrete demolition? I had an architect ask me about using it on a project & I'd never heard of it. His concern is noise and dust from jackhammers, not replacing explosives. I suspect that it's so expensive it's only used as a last resort when explosives can't be used.





RE: Expanding mortar concrete demolition
I've looked into non-explosive demolition agents (such as Dexpan) for previous projects, but have not actually used it yet. A 44lb. box of Dexpan will run around $100, and according to the literature will fill approximately 36 LF of 1.5" diameter holes. The manufacturer recommends a hole spacing of 12" o.c., drilled to 80% of the concrete depth. So in my case, for an 8" slab, we would get approx. 70 sf of coverage per 44 lb. box - around $1.45/sf.
Not bad for limited floor areas, isolated equipment foundations, etc. For a large floor area it could get expensive, but if noise and dust are a concern, this could be a good alternative. Bear in mind though that there will be some noise and dust regardless, as you will be drilling a grid of 1.5" diameter holes, most likely using rotary hammers. Not as bad jackhammers, but still a potential consideration.
Hope this helps,
Brandon
RE: Expanding mortar concrete demolition
RE: Expanding mortar concrete demolition
RE: Expanding mortar concrete demolition
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: Expanding mortar concrete demolition
Good Luck
RE: Expanding mortar concrete demolition
RE: Expanding mortar concrete demolition
RE: Expanding mortar concrete demolition