Fiber concrete contains small pieces of plastic or glass, prevents cracks on thin surfaces such as plates or tabletops. Based on fine sand, it resists frost. These products are made with different types of concrete.
The imprints, also called molds or dies are made of polyurethane. They make it possible to print a relief on a fresh support (concrete or microchip) within the framework of the realization of a printed concrete. There are many reasons to imitate a lot of natural materials: wood blades, rock, stones and bricks. For ease of printing, it is essential to have at least 3- 4 footprints including a soft one for the edges of the walls.
Footprints known as skins or textures perfectly imitate all types of rock: granite, slate and travertine. Since they do not have delimited edges, there is no connection to make during their application. They are therefore the easiest imprints of use, they are ideal for a first site.
Circular footprints can enrich and magnify a printed concrete realization by adding a central decorative element such as a wind rose, a sun or a paved circle.
Preparing concrete molds
Take a bucket or a hard plastic tub and pour some water to prevent the powder from sticking to the bottom. After taking care to protect your hands with gloves, put some lids of concrete in the bucket (avoid breathing dust). Add water gradually stirring to obtain a thick and viscous mixture. Perform the meatball test: the mixture must be able to be shaped into a ball, but it must collapse when you shake the hand.
Half of a concrete bucket corresponds to the maximum amount that you can mix by hand. For larger quantities, use a concrete mixer. The mixture must be able to be shaped into a ball. The ball should sag when you shake your hand.
Once the work is done, rinse the tools and pour water into the bucket to prevent the remains of concrete from sticking to the walls. Do not throw away water immediately. Let it sit until the lime settles to the bottom and discard it when it has cleared. Scrape the concrete and put it in the trash.
Fill the mold almost to the top. When making cups or jars, leave enough space at the top of the mold to slide in the fingertips and unmold the object more easily.
Shake or tap the mold for the concrete to fill it perfectly. Tamp the concrete with a trowel or stick. Shaking the mold, you see small bubbles of air on the surface of wet concrete. The more bubbles, the more the concrete surface will be smooth.