Concrete is a concoction known for its durability and compressive strength . One of the component inconcreteis the aggregate , a admixture of gravel and break down rocks that becomes bound together by the other ingredients as the concrete cures . you may divide concrete into two grade , lightweight and heavyweight , based on the type of aggregate it contains .
Density
The cardinal departure between lightweight and heavyweight concrete is the density of the aggregate . Lightweight concrete is made using aggregate whose compactness is less than 2,100 kilograms per cubic M ( or 131 British pound per per three-dimensional understructure ) , while aggregates with greater densities give hike to so - call heavyweight concrete . Expanded clay , ticket and shale are common aggregative material in lightweight concrete , while heavyweight mixtures use either denser minerals such as heavy spar or manufactured material such as iron and lead shot . Lightweight concrete has a broader range of applications .
Lightweight Concrete
The aggregate material in lightweight concrete typically has a lower density because it is more holey . For example , it may have many microscopic air spaces incorporate into its social system . The answer is an sum with a high absorption time value , which may sometimes necessitate caution in determining the amount of each ingredient to use . Prewetting the aggregate before combining it with the other factor may help alleviate the change in consistency that might otherwise accompany absorption .
Heavyweight Concrete
Heavyweight concrete is made from totality with a denseness between 2,080 and 4,485 kilograms per cubic beat ( or between 130 and 280 pounds per cubic ft ) . These aggregates are much less poriferous and absorbent , and the resulting concrete has a higher mint - to - volume ratio . The aggregate - to - cementum proportion also prefer aggregate to a much peachy arcdegree than in lightweight concrete , even though the contents of the cement are around the same . sociable and pumps may exhibit greater pace of vesture when working with this character of textile .
Applications
Lightweight concrete can be subdivided into group such as extremist - lightweight and morphologic lightweight , depending on the denseness of the aggregate . Concrete with aggregated density less than 500 kg per cubic time ( 31 dog pound per cubic foot ) , for example , is reckon radical - lightweight , while structural concrete generally falls in the range of 1,100 to 1,750 kg per cubic meter ( 70 to 110 pounds per three-dimensional foot ) . Most morphological , masonry and insulating concretes are lightweight . Heavyweight concrete , by direct contrast , is most often used for radiation shielding , although it also is used in the building of ballasts for seaward pipeline .
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