Introduction: DIY Concrete Lamp
I found this technique very playful. With some cement in hand and some Christmas leftover balloons I created this tabletop lamp.
Foamboard (6" x 15") x 3pcs
Small balloons 30 pcs
200 watt bulb
Plywood piece of 6" x 6"
Ground clearance buffers 8pcs
1" Styrofoam (3" x 18") x 4pcs
Step 1: Making the Mold Structure
I drew lots of different circles on the foamboard and made the cutouts. Combined them from both ends and made a hollow rectangular structure.
Made a similar thermocol(styrofoam) rectangular structure, slightly bigger than the outer body for the walls.
Stuck the balloons from outside using sellotape. Make sure the balloons touch the inner styrofoam wall.
Step 2: Insert Concrete
Insert concrete from the side. Make sure the consistency of the concrete is on the runny side.
I made a 4:1:1 consistency where 3 part was concrete, 1 part of sand and water.
Let the construction dry for at least 48 hours before opening.
Step 3: Opening the Mold and Cleaning It
After 48 hours I removed all the balloons from the sides and opened the mold.
Cleaned it, polished the rough edges and drilled some holes which didn't form in the casting.
Step 4: Assembling
I took some old plywood and made it the size of the concrete base. Screwed the buffers from both the sides.
Attached the bulb holder and bulb on the center.