You need publications too, probably far more than your supervisor does as he/she is already an established researcher! I recommend that you do as much as you can in the time permitted and send it with a quick note to say 'this is what I've done so far, I'll work on it further tomorrow'. Unfortunately, PhDs do sometimes involve working at weekends and bank holidays etc so try to grin and bear it once in a while as it will be worth it in the long run.