scale interlocking concrete block form

thingiverse

Scale retaining wall interlocking concrete block form for RC-truck and construction machine playing landscapes and driving parcours. The base model is a 160x80x80cm standard block in 1:8 scale. Scale to whatever model scale you require: 1:6 133.3% 1:8 100% 1:10 80% 1:12 66.7% 1:14 57.1% 1:14.5 55.2% 1:16 50% For smaller scale it might make sense to print the blocks directly, you can find them here: https://www.thingiverse.com/thing:4937105 It includes full, half- and quarter-block, slope, hinge and foundation block. Feel free to suggest any missing variant you would like to see. My concrete mixture: (be sure to scale your incredients to the power of 3 as volume shrinks with 3 dimensions) full block (160x80x80) 100% scaled: 480ml water, 5g PP fibers, 13ml platicizising agent, 4000g concrete premix (0-4mm grain size). for the other blocks, estimate the concrete amount needed based on the volume (2000g premix per liter) and modify accordingly. I usually ad 500g concrete to be sure it will fill all forms that I prepare and do ~9 to 13.5kg in one go. That ammount can be mixed well in a bucket. For smaller scale I would suggest to leave the fibres away, to ensure propper filling of the form. Form oil is needed on form and a sheet metal as base. Propper vibration is key to get the rather stiff fibre reinforced mixture to flow into the form propperly. The top surface should be sweeped to the desired finish after the concrete beginns to set. Best time I found is ~2h after cast. Keeping the surface wet continously helps to maintain a good finish. The form can be stripped after 24h but the block is still soft and will take 2+ weeks to cure and reach nominal hardness. Keep it in a moist environment or under water for the first days after stripping.