Getting biscuit mix to rise...again
I'm in the middle of class (school), and I don't have a ton of time to type anything out, so I'll point you in this direction:

http://www.thekitchn.com/thekitchn/food-science/leaveners-fats-the-science-of-great-biscuits-109416

Should help, covers the science. The answer will be found, plus more!