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These are used in the application of bridges, heavy loaded structures, and roof with longer spans.
Also Read: Prestressed Concrete Principles, Need and Advantages Various structural elements can be made and cast in the factory as per the specifications and bought to the site at the time of assembly.
The examples of light weight aggregates are the pumice, perlites, and scoria.
The light weight concrete is applied for the protection of the steel structures and are also used for the construction of the long span bridge decks.
The normal strength concrete has an initial setting time of 30 to 90 minutes that is dependent on the cement properties and the weather conditions of the construction site.
The plain concrete will have no reinforcement in it.
The process of prestressing will require heavy equipment and labor skill (jacks and equipment for tensioning).
Hence the prestressing units are made at site and assembled at site.
These types of aggregates are most commonly used in the construction of atomic power plants and for similar projects.
These units have the advantage of acquiring speedy construction as only assemblage is necessary.
As the manufacturing is done at site, quality is assured.
The use of lightweight aggregates in concrete design will give us lightweight aggregates.
Aggregates are the important element that contributes to the density of the concrete.