Tuesday, March 27, 2018

[papercreters] Re: flyash



Hello Kim
Hope things are going well on your project. I finally finished my Papercrete just before Thanksgiving. All and all it was about 2,000 cubic feet to pour. I used a slip form. We poured new Papercrete walls against our existing Mobil home. W' e have free standing Papercrete at the addition. I have enclosed a picture of the form system and the finished pour. I still have to do the skim coat and waterproofing coat.

To the Flyash issue, I have not heard of flyash as a stand alone binder. Typically in concrete it is used as a supplement to cement to reduce the amount of cement required.

Before i began construction on our house i built a barn as my testing lab.  for my initial work I tried to maximize paper and minimize binder.  I did a mix with lime and wood ash that was very promising. The logistics of trying to get that much ash mad it seem like more than I could manage.

The mix i test was ( by weight)
paper     28%
clay        40%
Wood ash 19%
lime         13%
This was a stronger product than what i was getting with what I thought was comparable with cement. When I finally got a mix that I thought was what i need i got some compression tests. Compression strength was way too low.

Based on my final cement mix I think you can test a mix with these proportions ( by weight)
Paper newsprint)     14%
Clay                        15%
Sand                        27%
Ash                        27%
Lime                     17%

Please let me know what you come up with.

Best
Murry Holley






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Posted by: Murry Holley <murry.holley@yahoo.com>



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