Dear Indiakarl,
I would like to share two different ways of using rice hull that I have heard about.
Firstly, rice hull, per se, has excellent insulation properties and can be used in PC for that purpose.
Secondly, ash of rice hull, which are about 20% of the original weight of the rice hull, have excellent water proofing abilities.
Experiment with a mixture of 10% rice hull ash to see the decrease in wicking effect. The ash is almost pure silica.
Incidently rice hull ash is also pozzalonic in nature and will add strength to your mix.
Try and tell us what you find.
Regards
Ashok.
--- In papercreters@yahoogroups.com, indiakarl <indiakarl@...> wrote:
>
> perhaps it's already been done, but i was thinking that a vertical shaft lawn-mower engine might make a suitable power source for a non-towed mixer. old lawn mowers are readily available for pretty cheap. mounted the flange of the engine base to a couple of 2x4's so it will sit across whatever you want for a mixing drum. a shaft welded to the downward pointing drive shaft of the motor with a blade on the bottom - what ever length/depth you need for your drum. you might even go with a shaft that has a keyway that fits the drive end of the motor, so you could take off the mixer shaft. you could have a small "pulping" blade that would thrash the paper/carboard material to pulp, then a larger blade that would be good for mixing in the concrete. i'm home in thailand at the moment. haven't seen a conventional lawn mower in the 10 years i've been coming here. but they do have an abundance of hardworking Diesel engines that they use for "iron
> buffalo's", e-tan farm trucks etc. they have pulleys on the engine that they run drive belts off of to work irrigation pumps, pond pumps, threshing machines tons of things. a mixer could easily be powered by one of these: http://www.siamkubota.co.th/ (website is in thai, but you get the idea of the engines) didn't get to it this time at home, but next winter when i'm here, i want to build a "cool room", a small airconditioned room so the family has relief from the heat in summer season - obviously needs to be a well insulated building so we don't have a spend a small forturne on electricity and an air-con unit. PC would be ideal. i'm going to experiment with using rice hulls - another thing they have in abundance here. i can get a giant bag for 5 cents.
>
>
> --
> :::karl::: : : : : : : :
> read ThaiCountryLife
>
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