TABLE OF CONTENTS 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.
Lightweight Insulating Containing perlite, vermiculite, and expanded polystyrene, which is used as fill over metal roof decks, in partitions, and in panel walls.
Cellular Contains air or gas bubbles suspended in mortar and either no coarse aggregates or very limited quantities are included in the mixture. Use where high insulating properties are required.
Shot-crete or Gunite The method of placement characterizes this type of concrete, which is applied via pneumatic equipment. Typical uses are swimming pools, shells, or domes, where form-work would be complicated because of the shape of the structure.
Ferrocement Basically a mortar mixture with large amounts of light-gauge wire reinforcing. Typical uses include bins, boat hulls, and other thin, complex shapes.
