2) if the additive feeder system is equipped with a pump instead of a pressure tank, it should be cleaned and maintained according to the manufacturera#39;s recommendations. ... Three types of concrete pumps are used in wet-mix work: l) piston, 2) squeeze, and 3) pneumatic. ... then into vacuum helps to restore pumping tube FIG 6.l5 SCHEMATIC DIAGRAM 6-28 WET-MIX SHOTCRETE EQUIPMENT 6-28.
|Title||:||Shotcrete practice in underground construction|
|Author||:||James William Mahar, Harvey W. Parker, William W. Wuellner, University of Illinois at Urbana-Champaign. Dept. of Civil Engineering, United States. Federal Railroad Administration|