| 摘要 |
A light weight cementitious composition comprising a dry mixture of a hydraulic cement component and an aggregate component and which, upon mixing with wate r, produces a paste which is easily workable and sets to produce a light weight concrete mass. The hydraulic cement component includes at least two and usually three cement constituents. One constituent is a Type S, Type M or Type N masonry cement. A second constitue nt is a pozzolanic cement or an expansive cement, and a third constituent is a Type I cement, Type II cement or a Type III portland cement. In this mixture the first and second cement constituents are each present in an amount less than the third cement constituent. The second aggregate component in the dry mixture comprises a light weight aggregate present in a n amount to provide a bulk density for the dry mixture of no more than 100 pounds per cubic foot and more specifically, a bulls density of about 85 pounds per cubic foot, or less. Th e cementitious composition forms a readily workable paste which can be characterized as having a slump loss at one half hour of not more than 2 inches after mixing with water in an amount of about 21-23 wt. % of the dry mixture. The cementitious composition is conveniently packaged in a unit weighing no more than about 50 pounds per container.
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