[mathmonger]

I'm trying to learn how to use a grout bag for doing concrete repairs. It seems like the perfect thing to pump mortar into all sorts of random cracks. But it is not quite working the way I expected. It is okay for putting mortar on the surface if I keep moving, but if there is any kind of back pressure, it just seizes up and I can't squeeze a drop. Do I have to add even more water or use a certain type of mortar (I'm using the Sakrete "Type S")? Or do I just have unrealistic expectations of my grout bag?

 

[de-nagorg]

Your mix is probably too dry.

It is a trial and error thing to get it wet enough to flow, but not to gush.

Try adding just a half ounce at a time in mixing your test batch, if no flow, add a bit more, mix again, test, add water, mix , etc until you get a perfect. Then note it in your files, and refresh your memory each time that you need to.


ED

 

[Tscarborough]

It is not used to force mortar into joints. As noted, any back pressure stops the flow. With back pressure, the aggregate packs the tip no matter how wet or dry it is.

 

[stadry]

grout bags are used for brick joints &, in a pinch, icing cakes,,, most anything for concrete comes out of a tube,,, anything that comes out of a tube needs to have its final resting place prepared properly in order for the repair to be successful

sounds as if you're trying neither correct mtl, method, nor tools