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A brown Exposed Aggregate concrete driveway with a gray Exposed Aggregate border. 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).
They usually form early in the burial history of the sediment, before the rest of the sediment is hardened into rock. This concretionary cement often makes the concretion harder and more resistant to weathering than the host stratum. There is an important distinction to draw between concretions and nodules. Concretions are formed from mineral ...
Granolithic screed, also known as granolithic paving [1] and granolithic concrete, [2] is a type of construction material composed of cement and fine aggregate such as granite or other hard-wearing rock. [3] It is generally used as flooring, or as paving (such as for sidewalks).
In Europe, sizing ranges are specified as d/D, where the d shows the smallest and D shows the largest square mesh grating that the particles can pass. Application-specific preferred sizings are covered in European Standard EN 13043 for road construction, EN 13383 for larger armour stone, EN 12620 for concrete aggregate, EN 13242 for base layers of road construction, and EN 13450 for railway ...
A single concrete block, as used for construction. 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
The Pantheon in Rome is an example of Roman concrete construction. Caesarea harbour: an example of underwater Roman concrete technology on a large scale. Roman concrete, also called opus caementicium, was used in construction in ancient Rome. Like its modern equivalent, Roman concrete was based on a hydraulic-setting cement added to an aggregate.
Precast concrete is a construction product produced by casting concrete in a reusable mold or "form" which is then cured in a controlled environment, transported to the construction site and maneuvered into place; examples include precast beams, and wall panels, floors, roofs, and piles.
When lumber is used to create the formwork, the concrete picks up the grain structure as it sets, resulting in a texture on the poured concrete that resembles the wood. It is important to use the same type of wood throughout the job, especially on larger buildings where the molds may get repeated uses, because the lumber can absorb moisture ...