James Hardie Research Pty Limited

David Malcolm Stitt

Basil Taha Naji

Brian P Sloane

James Gleeson

Peter Goodwin

Nigel Kirby

Steve Duselis

Anhthe Nguyen

James Albert Gleeson

Steven Alfred Duselis

Danielle Simone Klimesch

Ihor Himezak

An additive for use in the preparation of lightweight concrete, said additive including a blend of from around 40% to 99% of organic polymeric material and from 1% to around 60% of an air entraining agent. The additive is particularly suitable for the preparation of lightweight concrete which uses polystyrene aggregate. It provides for excellent dispersion of the polystyrene aggregate and improved bond between the polystyrene aggregate and surrounding cementitious binder. The resultant lightweight concrete formulation may be pumped and is particularly suitable for sandwich wall construction.

Concrete formulation

A formulation for preparing a cementitious product comprising a cementitious material, a siliceous material, and a low bulk density material being substantially calcium silicate hydrate and including unreacted siliceous reactant. A method of forming a cementitious product comprises adding a cementitious material, a siliceous material and a low bulk density material to water to form a slurry, forming a green shaped article from the slurry and curing the article in an autoclave, wherein the low bulk density material is substantially calcium silicate hydrate and includes unreacted siliceous reactant.

Building products

This invention relates to a formulation for preparing a dry formulation for preparing an autoclave cured cementitious product comprising:

Cement formulation

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Chatswood, Australia

David Malcolm Stitt