The putty can't be sanded; is it possible to reduce the binding material again? Lower which addictive is better? Or add an air-entraining admixture?

L

Luis

Member
The interior wall putty included 40%cement and 40% calcium hydroxide. Workers complained that it is hard to sand. Can we reduce binding material again? Lower which addictive is better? Or add an air-entraining admixture?
 
You must experiment by yourself, subtract 5 kg of binding material each, and try it out. If the hardness is not enough, add some more, and adjust the quantity based on whether you can polish it.
 
40% cement and 40% calcium hydroxide, the ratio of the two cementitious materials reaches 80%, which is way too much. Therefore, it would be best to know the standard before making a product. For example, the standard for interior wall putty is formulated as JG/T298-2010, which has requirements for sanding property. After fully understanding the standard before you start to design a formula, trial and error make the products easy to manufacture and use at a reasonable cost.
 
Calcium hydroxide is easy to desquamate in winter; cut it down and make it up on the cement. Think about it.
 
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