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Discussion Starter · #1 ·
My machinist says we are going to do a short fill on the Cleveland so I bought some of the stuff... it lasted about 1 day before I just hadta start messing with it. So I pinched a little sample out of one of the bags and mixed it up and let it set up for about 14 hrs. Now ive done my fair share of cement work in my life and it really looks like ive hard bloked several pair of boots cause this stuff looks alot like cement slurry- i was really planning on a plastic based block filler, what is this stuff? isnt this stuff suposta be strong ? i busted the sample....
 

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It's more like tile grout, but it doesn't shrink or expand. It's strong, but brittle. Not like it's going anywhere in the block to break apart though. It does absorb vibration, keep the cylinders "round" and kind of ties it all together though.
 

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It refered to as nonshrink grout, It is a mixture of Cement, Iron and a few other things. Its also used to grout machinery, Steel Etc. If its mixed in the proper way (not to wet) it will not crumble. Comprehensive strenth will usually be well over 6000psi.
 

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Oh Yea, DO NOT USE regular cement, mortar, ot tile grout to fill a block...........it will not withstand the thermal and chemical attack.
 

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Discussion Starter · #5 ·
I did mix it too wet on the first batch... I cant break the second batch.
 

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The idea of Hard-Blok is that it expands at the same rate as the iron - so you dont have gaps and cracks that defeat the whole purpose of filling it.

Basically, its as close to making the block solid iron as you can get without casting a new block. Regular concrete only has 3,000-4,000 PSI compressive strength, like dfree383 said, it can raise the strength significantly.
 
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