While there are several differences between the two, the key difference between limestone and gravel is their compositions.

Using sequestered carbon dioxide, Blue Planet Systems Corp. is developing a construction-grade rock, and ultimately concrete, that would have net-zero or net-negative carbon footprint. Knife River ...

This demonstration of a net zero embodied carbon concrete placement incorporated 75% by volume replacement of standard aggregates with Blue Planet's synthetic limestone aggregate. In the coming ...