An ugly idea:
Use windows task scheduler to start a new browser displaying that webpage.
Most browsers allow you to specify the startpage like this
"C:\Program Files (x86)\Internet Explorer\iexplore.exe" http://superuser.com/
T+0: Start webpage 1
T+10min Kill all browser processes, start a new browser with webpage 2
T+12min Kill all browser processes, start a new browser with webpage 3
To kill the browser you could use
taskkill /f /im iexplore.exe*.
Personally I find this an ugly way to do it, but it seems one way to accomplish your task.