Which of the following methods is NOT commonly used for handling and transporting concrete?

Pneumatic tubes are typically associated with the transport of lightweight materials such as documents or small parcels through a system of tubes using air pressure. In contrast, concrete is a heavy and dense material that requires handling methods specifically designed to manage its weight and consistency.

The other methods listed—chutes, push buggies, and pumping through a pipeline—are standard practices in the concrete industry. Chutes facilitate the gravity-based delivery of concrete from higher to lower elevations, while push buggies are manually operated carts for transporting smaller batches on job sites. Pumping through a pipeline is a highly efficient method for delivering concrete over long distances or to hard-to-reach areas, making it indispensable in modern construction.

Therefore, pneumatic tubes are not suitable for the transport of concrete, while the other methods are well-established and widely used in the concrete handling and transportation process.