Concrete Pumping: What You Can’t Pump
Concrete pumping is a convenient and efficient way to transport concrete quickly and effectively over long distances. It is also one of the safest and most cost-effective methods available, as it requires less manpower and a minimal amount of material handling. While pumping is an ideal solution for many construction projects, not all types of concrete can be pumped. Knowing which materials can and cannot be pumped can help ensure a smooth, successful concrete pumping job.
First, it is important to recognize that concrete is a complex mixture of water, cement, sand, and other aggregates. Depending on the type of concrete being used, the mixture can vary greatly, and these variations can play a significant role in whether or not it can be effectively pumped. Generally speaking, concrete that contains more than 10% aggregate may be too thick for pumping, and specialized mixes such as shotcrete, refractory concrete, and high-strength mixes may also pose a pumping challenge.
Fiber-reinforced concrete or concrete mixes containing other types of additives may also be difficult to pump. These compounds may cause blockages or mechanical issues inside the pump, so it is important to consult a professional concrete pumping specialist before attempting to pump these types of concrete.
In some cases, the presence of certain foreign objects or contaminants can interfere with the pumping process. Rocks, bits of metal, sticks, leaves, and other debris should be removed from the concrete to prevent potential clogs or damage to the pump. It is also important to ensure that the mix is as homogeneous as possible, as this will allow the concrete to flow more smoothly and reduce the chances of clogs and other pumping issues.
During the concrete pumping process, the mixture passes through a series of hoses and pipes at high pressure. If these hoses or pipes are not positioned correctly, the concrete can become trapped, resulting in a backup or blockage. It is important to take the time to properly place the hoses and pipes before beginning the job. It is also a good idea to inspect the hose for any leaks or damage before beginning. A leaking hose can cause the concrete to flow out of position, resulting in a sloppy or uneven finish.
In addition to materials issues, other factors can interfere with the concrete pumping process, such as weather. In extremely cold conditions, the concrete mix can freeze, preventing it from flowing through the pump. This can lead to costly downtime and expensive repairs. In hot temperatures, the concrete may dry out too quickly, making it difficult to pump. Windy conditions can also blow the concrete off target, resulting in a sloppy end result.
When it comes to concrete pumping, certain types of concrete can prove challenging to pump. Knowing what can and cannot be pumped can help ensure a smooth, successful job, and working with an experienced professional concrete pumping specialist can help ensure that all materials and conditions are taken into account.
