| I just use a 8 X 8 hand plate tamper to compress the PC. It needs to drain at least 15 -20 minutes before compressing. I cannot say it makes a better or worse block, only it makes it a little more uniform when it dries. The compressed ones TEND not to have the 20 degree angles on the sides, but occasionally they do. I am not trying to make a PC equal to clay CEB's. My form is the 12 X 12 X 24 made with 2 X6 lumber. I let it drain, compress it with the tamper, pull the form, let it set for a little while depending on the temp then edge it for final drying. |
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