Importance

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Abstract

A lightweight concrete composition comprising a dry mixture of an aggregate component, a hydraulic cement component and a fiber component. The aggregate component has a bulk density of 75 pounds per cubic foot or less and is present in the composition in an amount within the range of 55-70 wt. %. The hydraulic cement component is present in the dry mixture in an amount within the range of 30-45 wt. % and comprises three constituents. One constituent is selected from the group consisting of Type I and Type III cements and mixtures thereof. A second cement constituent, present in in an amount which is less than the first cement constituent, is a pozzolanic cement. The third cement constituent is present in an amount which is less than the amount of the second cement constituent and includes Type S masonry cement, Type N masonry cement, an air entraining agent and mixtures thereof. The fiber component can be Type AR glass fibers, having an aspect ratio within the range of 0.0015-0.005.

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First Claim