From where can the specific gravity of fly ash be obtained?

The specific gravity of fly ash can be reliably obtained from the Qualified Products List (QPL), specifically number 50. This list is maintained to identify materials and products that meet specific performance criteria set by the relevant agency or organization, in this case, the Department of Transportation. The QPL is a trusted resource that includes detailed specifications, properties, and approved materials, ensuring that the information regarding specific gravity is accurate and compliant with industry standards.

While other resources like industry standards manuals or concrete mix design guides may provide useful information about fly ash, they may not include specific gravity values or may not be as directly authoritative as the Qualified Products List. The aggregates handbook might focus more on conventional materials, leaving out the specifics of fly ash, which is a specialized material in concrete production. Hence, the Qualified Products List stands out as the correct source for obtaining the specific gravity of fly ash.