On Wednesday, July 14, 2004, at 10:46 AM, Kim & Garth Travis wrote:
> it appears that all the recipes and uses I am finding use either > portland > or lime, so I am wondering what the advantage to adobe could be? > > From my understanding of the chemistry, there wouldn't be much. RHA is a pozzolan, which means it forms calcium silicate hydrates in the presence of CaO, which of course is lime, and which is also produced as a byproduct of the portland reactions. Unless the soil (or the RHA itself) contained significant amounts of CaO or calcium hydroxide Ca(OH)2, there wouldn't be a pozzolanic reaction. The RHA would then be serving as just another filler material (a silty aggregate), rather than contributing to the binder fraction of the mix. -K ------------------------ Yahoo! Groups Sponsor --------------------~--> Yahoo! Domains - Claim yours for only $14.70 http://us.click.yahoo.com/Z1wmxD/DREIAA/yQLSAA/FGYolB/TM --------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://infoarchive.net/sgroup/biofuel/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/biofuel/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
