| 摘要 |
A formula of lightweight aggregates, fiber, and Portland Cement, which, when graded, prepared and mixed as described produces a lightweight, fire and thermal resistive concrete which can be successfully and easily extruded into shapes for use in construction, principally, roofing tiles, shingles and shakes. This mix can also be pressed into the same shapes and brick and block shapes. The resultant compressed product is homogeneous and uniform thus creating superior strength characteristics. This "concrete" is approximately half the weight of traditional concrete (specific weight is 0.85 to 1.0, or expressed in metric, 0.85 gr. per cc.) and is greater than half as strong and absorbs the same amount of water.
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