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Exposed aggregate concrete is a popular decorative concrete option known for its decorative gravel appearance. During the concrete pouring process, the top layer of cement/sand paste is removed to reveal the embedded aggregate (stones, pebbles, or even shells). This creates a visually appealing surface with a variety of colors, shapes, and sizes.
The art in traditional rendering is (apart from getting the mix right) the appearance of the top coat. Different tradesmen have different finishing styles and are able to produce different textures and decorative effects. Some of these special finishing effects may need to be created with a thin finishing top coat or a finishing wash. [6]
The concrete should always be professionally finished with power trowels and cured with water for seven days. Polishing should not begin until the concrete is fully cured (generally 28 days). The concrete slab can contain decorative aggregates to create many different aesthetic appearances, see Terazzo. The aggregates are often sized 8 – 20 ...
Concrete is a composite material composed of aggregate bonded together with a fluid cement that cures to a solid over time. Concrete is the second-most-used substance in the world after water, [1] and is the most widely used building material. [2] Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminium combined. [3]
Concrete manufacturers started experimenting with modern decorative concrete techniques as early as the 1890s. [4] In the 1950s, Brad Bowman—considered the "father" of modern concrete stamping—began developing and patenting new techniques for producing concrete that resembled non-concrete materials, such as flagstone and wood. [ 4 ]
Concrete toppings can also receive color, stains, saw cuts or mechanical polishing to produce a decorative concrete finished wear surface. When self-leveling concrete is poured, it has a viscosity similar to that of pancake batter. A gauge rake is used to move it into place without spreading it too thin. The finishing is then done by lightly ...