ASTM C 939 Grout Flow Cone

thingiverse

I designed this test cone to measure the consistency of my grout pours per ASTM C-939 without breaking the bank since I only do this once or twice a year. The build specs come from one of many websites that describe the test, including http://www.c-s-h.ir/wp-content/uploads/2014/12/C-939.pdf. I posted the entire unit as designed and also split it into two halves to fit on my printer, which was a bit too tall for my Prusa MK2. The cone should glue fine with any ABS glue, but I might add some scrap pieces to the sides of the support planes if I'm feeling paranoid about the glue joints. I'll wash it promptly after use so that even if the texture is coarse, I can still get it reasonably clean and reuse it. This test cone helps others do things the right way without getting ripped off. Feel free to let me know if I misread the specs, but I'm pretty sure I got it right. Edit: The first time I calibrated it with water, it was a bit porous, so I added some latex paint and poured it out, wiped it down, and let it dry. It was watertight thereafter. When I timed it again, I got 9.5 seconds for 175ml of water to exit the bottom, which was way outside the 8 +/- 0.2 seconds. The hole was tight, so I ran a sharp 1/2" drill bit through the neck and tried again. This time, I got 8.22, 8.26, and 7.83 seconds, so I'm calling it good. You can buy one that performs as well for $600 if you really want to, but personally, I'll keep my money.