Abstract
Rice husk ash containing silica in a highly reactive form is found to be an excellent ingredient for making either lime-rice husk ash or portland-rice husk ash cements. Properties of both types of cements were investigated by standard ASTM test procedures. Portland-rice husk ash cements containing up to 50% ash showed compressive strengths which were considerably higher than the control portland cements even at early ages of 3 and 7 days. Test data is presented to show that a unique property of the cements containing rice husk ash is their good resistance to dilute organic and mineral acids.
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