mortar type and mix


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Old 12-13-07, 08:03 AM
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mortar type and mix

I am building a new house I will be using stone from the salado quarry in texas, the size will be 2-4 and 6" chop. color hill country white, most walls will be 9', one wall will go to about 16'. I see some masons using type n and one was using type s. i have not found one you can speak to, to ask why they are using what they are using and what the sand to mortar mix was that they were using for the stone install
 
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Old 12-13-07, 09:46 AM
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Type N or even type O (portland/lime) is best for the Austin chalk.

If you will be using type N masonry cement, mix it at 1 part cement to 3 parts sand.

For portland lime type O use 1 part cement/2 part lime/9 parts sand.

The idea is not to have a high compressive strength mortar, it is to have a high bond strength. With that rock, the portland/lime type O is preferred.
 
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Old 12-14-07, 02:56 PM
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type o mortar

Thank you for your help, i read that type o mortar was for non-loadbearing and not subject to weathering
 
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Old 12-15-07, 12:46 AM
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Right. Non loadbearing, as in a stone veneer, and for low to medium weathering service like we have in central Texas. The mortar is stronger than and more weather resistant than the rock.
 
 

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