James Hardie Technology Limited

James Hardie Research Pty Limited

Brian P Sloane

James Albert Gleeson

David Leslie Melmeth

Kalynne H Paradis

Dean M Seligman

Basil Taha Naji

David Malcolm Stitt

Nigel Kirby

Peter Goodwin

Steve Duselis

Anhthe Nguyen

James Gleeson

Steven Alfred Duselis

Danielle Simone Klimesch

James A Gleeson

David L Melmeth

This invention relates to a formulation with the addition of low density additives of volcanic ash, hollow ceramic microspheres or a combination of microspheres and volcanic ash or other low density additives into cementitious cellulose fiber reinforced building materials. This formulation is advantageously lightweight or low density compared as compared to current fiber cement products without the increased moisture expansion and freeze-thaw degradation usually associated with the addition of lightweight inorganic materials to fiber cement mixes. The low density additives also give the material improved thermal dimensional stability.

Fiber cement building materials with low density additives

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

Growing community of inventors

Old Toongabbie, Australia

Brian P Sloane