Lightweight material comprising Portland cement, lime, sand, a colloid and an air entraining agent
First Claim
1. A lightweight concrete material comprising Portland cement, slaked or hydraulic lime, sand, a colloid and an air entraining compound obtained by vigorous mixing of the components taking up high proportions of air to obtain a controlled and predetermined density, wherein said material contains an equal or greater proportion of lime than Portland cement, said material having been subjected to carbonation by exposure to an atmosphere containing a high content of carbon dioxide.
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Abstract
The present invention relates to a lightweight material comprising Portland cement, a colloid, an air entraining compound and lime. This material is manufactured by effecting a vigorous mixing during which high proportions of air are taken up in the mixture to obtain a controlled and predetermined density.
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Citations
14 Claims
- 1. A lightweight concrete material comprising Portland cement, slaked or hydraulic lime, sand, a colloid and an air entraining compound obtained by vigorous mixing of the components taking up high proportions of air to obtain a controlled and predetermined density, wherein said material contains an equal or greater proportion of lime than Portland cement, said material having been subjected to carbonation by exposure to an atmosphere containing a high content of carbon dioxide.
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8. A process for preparing a lightweight concrete material comprising Portland cement, lime, sand, a colloid and an air entraining agent comprising:
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i. vigorously stirring a mixture of cement, sand, and a colloid in water in the presence of slaked or hydraulic lime, said stirring being maintained during a period of time sufficient for taking up high proportions of air to obtain a controlled and predetermined density, wherein said mixture contains an equal or greater proportion of lime than cement; and
,ii. carbonating the lime by contacting the material with an atmosphere having a high content of carbon dioxide. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification