Looking for High (relative) tensile strength very low weight cementitious material
Looking for High (relative) tensile strength very low weight cementitious material
(OP)
As the title says, I'm looking for a material with the following characteristics...
1. Cementitious material
2. Light weight (<60 pcf)
3. Low compression strength < 1000 psi
4. High relative tensile strength
I can find materials satisfying 1, 2 and 3, but unfortunately cannot find any information on tensile strength in these cases, or, at least, not promising information. Does anyone know of a cementitious material that possesses these properties? It would be used in a slab on grade application.
1. Cementitious material
2. Light weight (<60 pcf)
3. Low compression strength < 1000 psi
4. High relative tensile strength
I can find materials satisfying 1, 2 and 3, but unfortunately cannot find any information on tensile strength in these cases, or, at least, not promising information. Does anyone know of a cementitious material that possesses these properties? It would be used in a slab on grade application.






RE: Looking for High (relative) tensile strength very low weight cementitious material
RE: Looking for High (relative) tensile strength very low weight cementitious material
What possible application could this have?
RE: Looking for High (relative) tensile strength very low weight cementitious material
RE: Looking for High (relative) tensile strength very low weight cementitious material
What I'm after is a light weight topping slab. It needs to have a low compression strength for various reasons but the goal is to find something where tension is not tied to compression strength (ex; not 7.5 sqrt f'c). I think the fiber reinforced foamed concrete (cellular concrete / etc.) is probably the closest thing. To top it off I'd prefer it be brittle in tenion (but also strong) but at that point I think I'm asking to much.
In a bit more detail, the application is a thin (<2") topping slab on grade for a very lightly compacted fill material that itself has a low compression strength. The topping slab needs to resist uplift from high winds though so it needs a reasonable tension strength since it has a low mass. At the same time, it needs to be weak in compression (< 500 psi likely) so that it can still be easily penetrated if something heavy is placed on top of it. A bizarre application to be sure and why I'm seeking any advice on such a material. Cementitious materials are notorious for poor tension performance, especially light ones with low compression strength. Just seeing if something exists that is against this typical trend.
RE: Looking for High (relative) tensile strength very low weight cementitious material
Short fibers inside a foam-filled concrete won't contribute much to tensile strength. Some certainly, but not too much.
RE: Looking for High (relative) tensile strength very low weight cementitious material
RE: Looking for High (relative) tensile strength very low weight cementitious material
that's too thin
compact the subgrade
that just doesn't make sense
neither does that
I don't mind the philosophical discussion about materials though.
RE: Looking for High (relative) tensile strength very low weight cementitious material
I'm currently looking into...
-- Foamed concrete
-- Cellular concrete
-- Low density CLSM
These all give me low density, low strength, frangible/brittle behavior and the ability to be cast as a thin slab but unfortunately they do not offer much in terms of tension strength relative to their compression strength (typically 10-15% direct tension and 25% flexural tension). Just trying to see if there's something out there that might be similar but have improved tension response.
RE: Looking for High (relative) tensile strength very low weight cementitious material
RE: Looking for High (relative) tensile strength very low weight cementitious material
Doug Jenkins
Interactive Design Services
http://newtonexcelbach.wordpress.com/
RE: Looking for High (relative) tensile strength very low weight cementitious material