• Post Reply Bookmark Topic Watch Topic
  • New Topic

Cast Earth Retardant  RSS feed

 
Erik Rasmussen
Posts: 5
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Looking for the retardant used in Cast Earth building.  I want to pour a monolithic form, and need to increase the set time.  I know its proprietary — do you think that a gypsum retarder and cement retarder in conjunction would equal whatever metallurgic retardant that is currently used proprietarily?
 
William Bronson
Posts: 1492
Location: Cincinnati, Ohio,Price Hill 45205
19
forest garden trees urban
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Curious about this myself.
Note that the drywall compound that comes as a powder is largely plaster of Paris  and comes in formulas timed to set in anywhere from 5 to 300 minutes.

Here are the percentages from the MSDS.

Plaster of Paris >60
Limestone or Dolomite <10
Expanded Perlite <10
Mica <10
Vinyl Alcohol Polymer <5
Attapulgite <5
Crystalline Silica <5
 
Oh the stink of it! Smell my tiny ad!
Thread Boost feature
https://permies.com/wiki/61482/Thread-Boost-feature
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!