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Lightweight material comprising Portland cement, lime, sand, a colloid and an air entraining agent

  • US 4,135,940 A
  • Filed: 12/13/1977
  • Issued: 01/23/1979
  • Est. Priority Date: 12/17/1976
  • Status: Expired due to Term
First Claim
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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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