pointing up chimney on barn

BLW · Sep 22, 2012

hi guys and gals i need info going to point up a chimney on the barn using mason mix quick crete and the bonding adhesive my prob is i have never used the bonding agent and it does not tell on the jug what porportions i mix with the cement et. if i mix up a couple of gal. size, i know it hardens quick, how much bonding agent do i add to the cement to make it come out right thanks for any info always get good answers on this sight sorry i put it in the tractor section

Janicholson · Sep 22, 2012

I am teaching a Concrete and Masonry class at SCSU this semester. There are two methods of using the bonding agent. One is to prep the masonry with a cleaning and drying, then coating the masonry directly with the undiluted agent. Next is the placement of the pointing mortar while the bonding agent is still not quite dry. The other is to blend the bonding agent into the mortar directly. A combination of both might be best practice in this case. The Link is an example, I think it is close to what you need. I would mix only about one quart of mortar at a time, as the application is time consuming and too much mix will harden before applied. Best of luck. Jim
One set of directions

Rich_WI · Sep 22, 2012

Its really not terribly important how much you use or even if you use it. Other factors are way, way more important than bonding agents. If you use it, put it in the mortar mix as well as on the joint you are going to fill. You want the joint damp, not wet or dry. It usually takes several applications on the joints because they soak it up so much. Just keep going over them untill they stop sucking up the bonding agent (or water, if you are using that). Here is the link to Acryl 60 and its directions. http://www.thoroproducts.com/pdf_appl/appl_acryl_60.pdf

Quikrete is not all that great of a mason mix, in fact its a pretty poor one. You are much better off stopping at your local brick yard and getting a couple sacks of what the pros use. Its only a couple dollars more and its less convenient to get but you will get a much better product.

Like I said earlier, other things are way more important than bonding agent like making sure the old mortar is properly removed, the joint is damp, the new mortar is properly placed, the mortar not drying too quickly causing cracks and proper tooling.

tomturkey · Sep 22, 2012

When I tuck pointed my chimney, I took spritzer bottle up the scaffold with me. Just spray the joint til water runs. That old brick is DRY. As said the brick needs to be damp to bond with the mortar. And remember, whatever you do will be an improvement of the chimney. gobble

BLW · Sep 24, 2012

thanks guys this was the info i needed it worked fine thanks again this site works the best of all farmers contact sites

pointing up chimney on barn

BLW

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tomturkey

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BLW

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