A hypertufa is an artificial rock that is made up of numerous aggregates that is merged together employing Portland cement. Considering they are very permeable and light, they are normally made as garden decorations, generally as plant containers. A hypertufa is an alternative for tufa, a steadily precipitated limestone deposited from springs.
There are several recipes for making hypertufas, although the standard formula is that it is one part cement for every three parts aggregate. For the most simple recipe, the main ingredients are 1 1/2 parts peat moss, 1 1/2 parts perlite, and 1 part Portland cement. Portland cement comes in two colors: gray or white. Gray is fine for most projects; meanwhile select white if you want a granite look to the end result or if you want to use colorants. Peat moss is included in the recipe as when it decays, it will leave openings and crevices that imitates the attribute of a true tufa rock. Meanwhile perlite is the material that makes a hypertufa light.
Instead of perlite, you can substitute it with vermiculite, although you may have a harder time finding one. Vermiculite will bring a bit more weight to your hypertufa. Additionally, it provides a sparkling look to your hypertufa. The proportion of materials is identical with the first recipe.
At times you might like to create a tougher, heavier hypertufa. This can be done with the addition of sand to your mix. Be aware that the type of sand will have an effect on the texture and color of the outcome of your project. For the proportion of this recipe, make use of an equal ratio for all the ingredients. Another component which can be included to strengthen your hypertufa is fiber mesh. For this recipe you need to make use of 2 parts of Portland cement, 1/2 part coarse sand, 1 1/2 parts peat moss, 2 parts perlite, and just a tiny amount of nylon fiber mesh.
Peat moss may also be substituted with coir, a processed coconut fiber. The recipe for this variation is 2 parts coir, 1Â½ parts perlite, and 2 parts portland cement. Remember that coir will not decompose as quickly as peat moss and as a consequence this recipe may not look like a real tufa rock, unlike those constructed with the latter.
You can also use hypertufa as a mortar, to combine genuine or synthetic rocks. For this purpose, you will require builders sand, clay soil, and acrylic fortifying additive. Black potting soil can also be used as a substitute for peat moss. The recipe is 1 part Portland cement, 1/2 part peat moss or black potting soil, 2 parts builders sand, and the acrylic fortifying additive.
As a final note, the key to every formula is the appropriate adding of water. Add water gradually until you attain the required consistency of your mix. You can always add more water anyway if you figure out that it is not enough.