Cementitious compositions with high compressive strength and uses thereof
AssigneeSika Technology AG
InventorJuan Antonio CALAMA
Life of this patent
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Abstract
Cementitious compositions include: a) 4-80 wt.-%, preferably 26-75 wt.-%, especially 30-66 wt.-% of a cementitious binder, especially of Ordinary Portland Cement, b) 5-95 wt.-%, preferably 20-73 wt.-% more preferably 33-66 wt.-%, of aluminum oxide, and c) 1-15 wt.-% preferably 2-10 wt.-%, more preferably 3-6 wt.-% of fibers. Such cementitious compositions have a very high strength and are used for example for concrete repair or as grouting materials.
Claims11
A dry cementitious composition comprising or consisting of, in each case relative to the total dry weight of the cementitious composition,
- a) 4-80 wt.-% of a cementitious binder,
- b) 5-95 wt.-% of aluminum oxide, and
- c) 1-15 wt.-% of fibers,
- wherein the aluminum oxide has a particle size as determined by sieve analysis according to standards ASTM C136/C136M and/or ASTM C117-17 in the range of 0.001 mm 8 mm.
A method to increase the compressive strength of a cementitious composition, said method comprising the steps of
- a) preparing a dry cementitious composition based on Ordinary Portland Cement,
- b) adding aluminum oxide with a particle size as determined by sieve analysis according to standards ASTM C136/C136M and/or ASTM C117-17 in the range of 0.001 mm 8 mm to the dry cementitious composition,
- c) adding fibers to the dry cementitious composition.
Dependencies are inferred from the claim text.