#compressed-earth blocks are supposed to be compressed with 21MPa, not 12MPa or 2MPa, which reduces the volume by half. Mentions that Raul Ramirez developed the Cinva Ram press in the 01950s driving a cam with a long lever, similar to the #Blocco-Mattone design.
on 02024-05-09previous #video on #compressed-earth block #mechanical machine from Zhenting Machine, similar to #Blocco-Mattone machine. Ideally 10–15% portland, 30% clay. The AECT machine cost US$60k so they bought this US$5500 machine from Alibaba, “Eco Brava Burning Free Interlock” from “Shandong Weida Construction Machinery Co. Ltd.”.
on 02024-05-09another #video on a #mechanical machine from Zhenting Machine in China costing several thousand dollars for interlocking #compressed-earth blocks for #construction. It measures the soil into the compression chamber, makes two bricks at a time, leaves hollow spaces in the bricks, and uses a hydraulic press for the compression the ejection, which is through an openable mold top like the #Blocco-Mattone machine. Although the compression work is done by a motor, the rest of the machine’s action is manual; the operator must run through a sequence of actions to make two bricks, taking about a minute — but preparing dirt is the bottleneck. The vertical and some horizontal corners of the bricks are chamfered, as are the interlocking studs, which are hollow. The horizontal corners on the ends of the brick are the ones which aren’t chamfered, an odd omission. They bought the 110VAC-powered model. (30 amps!!) Brick dimensions 300mm × 150mm × 115mm. 1½–2 buckets of dirt makes 6 bricks.
on 02024-05-09