I would b/f turn and b/f river. My reasoning is he may call the turn with a 4 with 45 34 type hands being in his BTN range also he may call with two broadway cards hoping to hit a decent house, so he will call with worse and he may also fold as an Ax is a large part of your BB calling range although it is unlikely you have quads. He still might fold all un-paired hands on the turn and your not giving broadways a free card to out house you on the river. Also it's an easy fold to a raise on the turn and on the river, as the likelihood of him trying to buy the pot with a bluff is unlikely on such a board so folding is easy unless you have a specific read otherwise.