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US 5,413,633 AGranted
Concrete
AssigneeBritish Gas Corporation
InventorsPhillip B. Cook, James B. Walker
Life of this patent
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Abstract
A concrete mortar is formed by mixing together sand, cement, water and a sewage sludge ash. A foam is added to the mortar to form a foamed concrete composition.
Claims7
A foamed concrete composition comprising sewage sludge ash and a foam comprising an aerated mixture of soap solution and water.
A method for making concrete comprising the steps of mixing together sand, cement, water and sewage sludge ash to form a mortar and adding a foam to the mortar to form a foamed concrete composition.
Dependencies are inferred from the claim text.