Can anybody tell me why a new set of brick steps seems to be leeching some type of white powdery stuff. What could be the cause of this? It's all over the brickwork and looks bad all the time. What can I do about this?
It's a very common issue with concrete and mortar, and is called "efflorescence." Below is a link with a few more details about why it occurs and what you can do about it.
Here is a link that might be useful: Efflorescence