Filling tart with beans/rice for baking
The rice/beans in this step act as a form of what are known as pie weights. They are used in order to maintain the shape of the crust as it is being baked. If you eliminate the weights during baking, you may encounter undesirable levels of puffing, curling and shrinking. If you'd rather brown the top of the bottom crust while baking, an alternative method often used is placing a second pie plate over the one containing the crust, and the metal should assist in browning the crust. 
Use standard foil.