Cob: fibrous concrete reinforcement

Tue Aug 5 20:07:53 CDT 2003

        Straw is much cheaper and works fine. Also straw adds considerable 
volume to your mix whereas, fibers are quite expensive, they tend to clump and 
will require considerable mixing to separate them and will not add bulk to your 
mix. I have never used plastic fibers in cob but I have plenty of experience 
using them to make cement flower pots, and I would expect they will act the 
same in cob renders.
Ed
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<HTML><FONT FACE=arial,helvetica><FONT  SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0">        Straw is much cheaper and works fine. Also straw adds considerable volume to your mix whereas, fibers are quite expensive, they tend to clump and will require considerable mixing to separate them and will not add bulk to your mix. I have never used plastic fibers in cob but I have plenty of experience using them to make cement flower pots, and I would expect they will act the same in cob renders.<BR>
Ed</FONT></HTML>