Low-heat high-performance concrete
AssigneeAtomic Energy of Canada Limited
InventorDannys Breton
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Abstract
A Low Heat High Performance Concrete (LHHPC) composition having a very low cement content and high W/CM ratio offers high strengths, low heat of hydration, excellent volumetric stability, low chloride permeability and low pH. To reduce the cement content while maintaining high performance, silica fume and silica flour are used in large quantities. The LHHPC composition can be used for high mass concrete structures and other applications which require low heats of hydration yet offers compressive strength comparable to Standard High Performance Cement (SHPC).
Claims11
A cementitious composition comprising:
- a. Portland cement;
- b. pozzolanic silica;
- c. inert mineral flour;
- d. aggregate;
- e. superplasticizer;
- and
- f. water;
- wherein the amount of Portland cement in the composition is in the range of 3% to 10%, the ratio of Portland cement to pozzolanic silica is between 1:0.8 and 1:1.2, the ratio of Portland cement to inert mineral flour is between 1:1.6 and 1:2.4 and the water/cementitious materials ratio of the composition is in the range of 0.40-0.55.
A cementitious composition comprising:
- a. Portland cement;
- b. pozzolanic silica fume;
- c. non-pozzolanic silica flour;
- d. aggregate;
- e. superplasticizer;
- and
- f. water;
- wherein the amount of Portland cement is in the range of 3.5 to 4.5% by weight of the composition, the ratio of Portland cement to silica fume is between 1:0.8 and 1:1.2 and the ratio of Portland cement to inert mineral flour is between 1:1.6 and 1:2.4 and the water/cementitious material ratio of the composition is in the range of 0.46 to 0.49.
Dependencies are inferred from the claim text.