Lightweight concrete compositions and uses of same
AssigneeBrickworks Building Products Pty Ltd
InventorsLloyd James Gainey, Althea Mai Neo Caballero
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Abstract
Described herein are cementitious compositions for forming a lightweight concrete on curing, comprising a cementitious binder, a lightweight aggregate, a non-lightweight aggregate, dispersible fines of size <75 μm in an amount of from 15.0 to 30.0 vol % as measured without use of a dispersant, coarse particles of size >2.36 mm in an amount of ≤30 vol %, and, water, as well as methods of using same to prepare lightweight concretes and lightweight concrete blocks.
Claims25
A cementitious composition for forming a lightweight concrete on curing, comprising:
- a solid component comprising:
- a cementitious binder and an aggregate component comprising a lightweight aggregate and a non-lightweight aggregate;
- dispersible fines of size <75 μm in an amount of from 15.0 to 30.0 vol % as measured without use of a dispersant;
- and
- coarse particles of size >2.36 mm in an amount of ≤30 vol %;
- and,
- water;
- wherein particles in the aggregate component of size ≥75 μm have a particle size distribution and/or shape that reduces particle packing such that the cementitious composition forms a cured lightweight concrete having a 28 day ambient density of at least 20% lower than an average particle density of the solid component.
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Dependencies are inferred from the claim text.