Concrete contractors San Jose will be familiar with the history of this durable building material. They use it to pour driveways, parking lots and backyard patios. Buildings constructed with it during the time the Roman Empire was in power, are still standing.
After that era, it was not often used until the eighteenth century. It became popular again during that time. It was originally applied in layers and is now combined with water and rendered into a liquid. It is poured into forms to build bridges and highways.
Often the words concrete and cement are thought to be interchangeable. However, cement is one of the components used to make the composite concrete. Other components are aggregates such as gravel or small pebbles and sand. Various proportions of these are used. Some structures require more strength and that is taken into consideration.
Their are famous dams and bridges that were built using this enduring material. It is popular for building foundations, bridges, highways and airport runways.
The decorative application may have color added to the mix. It can be stamped, stained, polished and colored. Using special molds, it can create statues, birdbaths or fountains. When stamped, it can take on the appearance of brick and when polished, it can mimic the mirrored finish of marble.
Joseph Aspdin created the mixture generally called Portland cement in 1824. He patented the mix. Joseph Monier invented reinforced concrete in 1849. It contained blood, which enabled it to resist damage from frost.
When you cook food the kinds and amounts of ingredients vary. It is the same when mixing this building material. The aggregates and other components vary in kind and proportion depending on what is going to be built. Large chunks of gravel or small pebbles may be added, along with sand and chemicals.
Water is added to the other components and they are mixed. Prior to pouring the mixture, rebar or steel is position in the forms as needed. The wooden forms hold the mixture in place as it dries and are later removed. Weight bearing structures such as bridges, skyscrapers and highway overpasses need this extra reinforcement.
In addition to water, chemicals may be added. This is done to either speed up or slow down the rate at which the mixture hardens. A skilled contractor is able to judge the optimal proportions of all additives that are appropriately used to build each type of structure.
Cold climate building projects must consider the expanding and contracting that will occur due to weather changes. This is not necessary in a warm climate. However, saw cuts will still be made in flat applications because they allow for some movement without damage occurring. In case of rain, hardening projects must be covered for protection.
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