Make sure the partclone package is installed.
apt-get install partclone
Create an empty image file.
Restore the clonezilla files into the image file.
cat sda1.ext3.ptcl-img.gz.* | gzip -d -c | sudo partclone.restore -C -s - -O image-file.img
* This is 3 commands on 1 line with pipes.
* Be sure to include the lone hyphen in the last command. That's not a typo!
Mount the image:
mount -o loop -t ext3 /folder-path/image-file.img /mnt
If you converted an NTFS partition, it probably won't mount. Try this...
Mount the image - NTFS:
ntfs-3g /folder-path/image-file.img /mnt
Special thanks to this very helpful forum thread: http://ubuntuforums.org/showthread.php?t=872832