dần xây 2015, H frame epoxy

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RotarySMP

The jump from 8% to 10 % was significant in how quickly it sagged under vibration (I just tapped that test mould on the floor for a couple of minutes. The 8% needed the rivetting hammer on the mould. I can imagine that 14% would be very wet, and leave a thick layr of epoxy on top once it settles.

I used some fine powdered alumina which was left over from my foundary furnace build. I bought it at a local pottery shop. Unfortunately the mesh size is not stated, but it has that fine powder feel like icing sugar.

I added a little laser printer toner to the 10% epoxy test, as it make the E/G look cooler.

You have a nice grading there. I only used 5 different aggregate sizes. 12-14% resin is lot. My test peices were with 10%% and 8% epoxy, and the ten percent was easy to vibrate, but the 8% settled as well with good vibrations. The Youngs modulus of the 8% measure nearly 20% higher (on my limited, poorly controlled experiment).

The scientific papers I have browsed on the web agreed that the aggregates need to be really dry, otherwise the strength dropped something like 20-30%.

GT40

I am shooting for a lower amount but I haven't seen the impact of the mineral flour on viscosity. Made test batches with everything else and was happy at 8%. The base is really over built so If I have a higher epoxy level, I think it will be okay and I would prefer not to have any inclusions in it.

Đây là kết quả mix của 2 tay to mặt bự bên cnczone đang làm con epoxy khá lớn. Các bác tham khảo.