General Properties of Concrete.

With some exceptions, the two most widely used concrete mixtures are:

• Normal-weight (stone) concrete with a dry weight of 145 psf (6.93 kPa); Lightweight concrete (LWC) with a weight of approximately 120 psf (5.74 kPa). 
• Extra light concrete, with weights as low as 80 psf (3.82 kPa), an be achieved with the use of special aggregates.

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