Is a mix of quarry dust and cement good for grouting slabs?

A mix of quarry dust and cement can be used for grouting slabs, but its effectiveness depends on the specific application and the desired properties of the grout. Quarry dust can enhance the strength and reduce shrinkage, but it may also lead to a less workable mixture if not properly proportioned. It's essential to ensure that the mix achieves the necessary flowability and adhesion for the intended use. Testing the mix for compatibility with the specific slab materials is recommended before widespread application.