§ 623.476-1 - Preference program for the purchase of cement and concrete containing fly ash.  


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  • Domestic contracts requiring the purchase of cement and concrete shall specify the performance requirements of the products required under the contract using appropriate standards/specifications when available. Consistent with such performance specifications, such contracts shall allow the contractor to deliver cement and concrete products that contain fly ash, a component of coal resulting from its combustion in electrical generating plants. Architects/Engineers shall specify performance requirements for the concrete to be supplied.