| 摘要 |
<p>A lightweight concrete composition comprising a dry mixture of an aggrega te 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 fib er component can be Type AR glass fibers, having an aspect ratio within the range of 0.0015- 0.005.</p> |
