Hello all,
On another forum I posted my easy plaster casting of bridge abutments.The whole process is below, its very simple to do. First you have to make the mold,I used heavy duty card stock for my molds.
This first picture is of the card stock mold clamped together…ready for plaster.
http://i32.photobucket.com/albums/d5/Dragonriversteel/Castbridgeabutment004.jpg
This next photo is of the plaster mixed in a zip lock bag.I use a zip -lock bag because its less mess and I can inject the mold by cutting a small hole in the corner of the bag,to inject the mold with plaster.
http://i32.photobucket.com/albums/d5/Dragonriversteel/Castbridgeabutment005.jpg
The next phot is of the mold filled with plaster…be sure to tap the mold while your injecting it to release the air bubbles and fill all the voids.
http://i32.photobucket.com/albums/d5/Dragonriversteel/Castbridgeabutment006.jpg
The next photo is after the plaster has hardened for about 5 to 10 mins. You then should remove only half the mold for two reasons. First you don’t want to damage the casting as your carving it and secondly its still easy to move it around.
http://i32.photobucket.com/albums/d5/Dragonriversteel/Castbridgeabutment007.jpg
Next you have to carve out the keystone. I do this by using a dentist pick and a machist tool. You must work quickly before the plaster really sets.
http://i32.photobucket.com/albums/d5/Dragonriversteel/Castbridgeabutment008.jpg<
