There are two primary steps to pouring exposed aggregate concrete, according to the Concrete Network. The base concrete is mixed and then poured into slab form using a shovel or concrete mixer, where it is struck off and bull floated. The decorative aggregate is then spread over the slab by hand or shovel until it covers the top of the slab and the embedded top using the bull float.Know More
According to the Concrete Network, an alternative to the two-step method is to mix the decorative aggregate directly into the concrete base and pour both elements into slab form. A less expensive alternative involves mixing the aggregate with concrete and spreading a thin layer of the mixture over an already-poured slab. The thin layer should be between 1 inch and 2 inches thick.
In all instances, once the aggregate is poured, it must be exposed as a final step. The aggregate can be exposed by washing the thin film of concrete off the stones with water and then brushing the slough away with a broom. The time allowed between laying the aggregate and exposure can be extended up to a day by spraying the surface with a chemical retardant that prevents the thin film of concrete on the aggregate from drying.Learn more about Building Materials
It is too cold to pour concrete if it has been colder than 40 degrees Fahrenheit for more than 3 days. The ideal temperature range is 50 to 90 degrees.Full Answer >
Concrete is a mixture of cement, water and aggregates, such as sand, coarse gravel or crushed rock. After it hardens, concrete is resilient, durable, resistant to environmental extremes and capable of supporting heavy loads. Grout is similar to concrete in its ingredients, but with a fine aggregate grade and a higher water content that allows it to flow easily and be used as a filler or joint sealer.Full Answer >
A concrete floor should be about 4 inches thick if it is in a residential home or building. For a building supporting heavy loads, 5 to 6 inches is the recommended thickness. A good quality concrete floor will have even thickness throughout.Full Answer >
To sand down concrete, remove any coating, seal the cracks and joints with an epoxy filler, attach metal-bonded diamond discs to a grinder, and sand the surface of the concrete. Start with a 30- or 40-grit diamond disc, and slowly increase the grit until you reach the desired finish.Full Answer >