"用碎石铺" can be translated as "to pave with gravel" or "to lay gravel" in English, depending on the context.
If you're referring to the action of actually laying down the gravel to form a path or surface, "to pave with gravel" would be appropriate.
If you're simply stating that gravel is being used as the material for paving, without emphasizing the action, "to lay gravel" could also be used, though it might be slightly more general.
In most cases, "to pave with gravel" would be the more precise and commonly used expression.