How long does it take an elbow joint fracture to heal?

It depend. On the kind fracture you have some take 6-8 weeks some take few month, also it depend if you developed complication or not.

Related Questions

My left shoulder is weaker because for 6 months I hade a cast on for a fracture on my elbow joint?

Physical Therapy... ...And strength training should help over time. Do not overdo training early on - slow and steady is the key. Read more...
Normal. I do not see a question here. But, your report of what happens when an extremity is casted is definitely normal. Read more...

How long can I expect pain and stiffness in my elbow joint after being in a long arm cast for 6 weeks?

Could take a while . 6 weeks is a long time for your elbow to be immobilized. You are young. With some physical therapy and time, i would expect you should regain most of your motion. Read more...