Separate concrete placing booms can be used when a boom truck is unavailable, or in situations where a boom truck may not be able to conveniently access the pour site. Combined with the right concrete pump, these placing booms provide a systematic method of concrete distribution.
The nominal maximum size of the coarse aggregate is restricted to one-third of the inside diameter of the pump for crushed aggregates or 40 percent of the smallest inside diameter of the pump for well-rounded aggregates.
The aluminum alloy pipe should not be used as a pump line. The flexible hose is made of rubber, spiral wound flexible metal, and plastics. If possible, the pipeline should be of one size and laid out to contain a minimum number of bends.
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