As long as it sticks and you are able to hone it off in a reasonable amount of time, it’s fine. Grout is a kind of concrete, after all.īut grout is filling only small holes that do not affect the structural performance of the concrete. You could also use accelerator to accelerate the curing rate. And in fact, you could use superplasticizer to make your grout more fluid, instead of adding more bonding agent diluted with water. You may be thinking that I usually advocate extreme precision in mixes, keeping your water-cement ratio low, and never adding water to make a mix more fluid but using superplasticizer instead. Precision isn’t critical, but using too much water can cause the grout to flake off. A 2-parts-water to 1-part-GFRC curing polymer worked very well. Since it has a higher solids content (51% in my case), I needed to dilute it more. After I started making GFRC, I used my GFRC curing polymer in my grout. For example, before I started using GFRC, I used Acryl 60 in my grout, and I found that diluting it 1:1 with water yielded excellent results. The end consistency of the diluted bonding agent should be similar to whole milk. Some off-the-shelf acrylic admixtures are already dilute enough to use straight, others will need even more dilution. The amount you should dilute liquid bonding agents with water depends on the bonding agent. It is mainly a curing agent, but it also functions as a bonding agent. Acrylic additives such as Acryl 60 or are excellent bonding agents. Various types of bonding agents will work. Bonding agent will make that thin layer of grout stick to the concrete and stay there. Without it, the very thin layer of grout you spread onto the concrete is prone to drying out and therefore not curing properly, and worse, likely to flake off the concrete. Adjust the consistency by adding more bonding agent or more dry mix as neededīonding agent is essentially glue. Spread on with your (gloved) hands or a plastic spatula.Add bonding agent diluted with water, until the mixture is the consistency of peanut butter.The same % of pigment to cementitious materials you used in your concrete.The same ratio of cement and pozzolan you used in your concrete.In reality, you need to use another important ingredient to make grout practical – bonding agent. Grout at its most basic is concrete taken to the extreme – just cement and water, hold the sand and aggregate, please. (I call it grout, many people call it slurry, and Buddy Rhodes calls it paste and is a master of manipulating it into works of art. What if there were an easy way to fill in that pinhole? Sometimes, you are left with that one pinhole, staring you in the face. However, the key word in all the above sentences is might. Dense concrete made with the exact same mix design except Alpha Pro Defoamer was added
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