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US 6,599,358 B1Granted
Carbon scavenger fly ash pretreatment method
AssigneeMainland Laboratory, Ltd.
InventorBruce E. Boggs
Life of this patent
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Abstract
A method for pretreatment of a quantity of fly ash for use in a cementitious composition containing an air entrainment agent. An effective amount of an aromatic carboxylic acid or its salts is added to the fly ash to satiate unburned carbon in the ash. The treatment with the aromatic carboxylic acid (or hydroxy substituted aromatic carboxylic acid or its salts) does not significantly promote or retard the air entrainment functions of the air entrainment agent.
Claims7
A method for pretreating fly ash for use in cementitious compositions containing an air entrainment agent comprising the steps of:
- applying an effective amount of an aromatic carboxylic acid or its salts to a quantity of fly ash to satiate unburned carbon in said ash and not promote or retard air entrainment functions of said air entrainment agent.
Dependencies are inferred from the claim text.