a vehicle in which freshly mixed concrete can be conveyed from the site of mixing to the site of placement; while being agitated, the truck body can either be stationary and contain an agitator or it can be a drum rotated continuously so as to agitate the
(1) the process of providing motion in mixed concrete just sufficient to prevent segregation or loss of workability; (2) the mixing and homogenization of slurries or finely ground powders by either mechanical means or injection of air. (See also agitator
a device for maintaining workability and preventing segregation of mixed concrete by agitation. (See also agitation.)
the volume of air voids in cement paste, mortar, or concrete, exclusiveof pore space in aggregate particles, usually expressed as a percentage of total volume of the paste, mortar, or concrete.
the capability of a material or process to develop a system of microscopic bubbles of air in cement paste, mortar, or concrete during mixing. (See also air entrainment.)
the incorporation of air in the form of microscopic bubbles (typically smaller than 1 mm [0.04 in.]) during the mixing of either concrete or mortar. (See also air entraining and entrained air.)
a device for measuring the air content of concrete and mortar.
perforated manifold in nozzle of wet-mix shotcrete equipment throughwhich high-pressure air is introduced into the material flow.
a space in cement paste, mortar, or concrete filled with air. (See alsoentrained air and entrapped air.)
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