Concrete pumping is an effective way of transporting concrete to areas which are not physically accessible by a standard concrete truck. Since prior to paving concrete acts as a liquid, large volumes of it can be pumped to certain locations such as high-rise buildings or extremely narrow roads through which trucks cannot pass easily. For a better understanding of the process, one of the most reliable concrete pumping companies in Edmonton presents a few FAQs:
1) What are the Types of Equipment used for Concrete Pumping?
There are two types of pumps used by concrete pumping companies in Edmonton:
Direct acting piston pumps – It consists of semi-rotary valves which allow the passage of the largest aggregate particles. This type can cover a horizontal distance of 1000 meters and a vertical distance of about 120 meters. The valves open and close alternately with pauses so that the concrete moves in a series of impulses and reaches the destination.
Squeeze pumps – Also called peristaltic pumps, they are the ones used for vacuum pumping. They have restricted range as compared to the first type. They can span a distance of 90m and 30m horizontally and vertically. They also have lesser pumping capacity than the direct acting pump.
2) What are the Prerequisites for Concrete Pumping?
One must ensure that the pipe diameter used for transferring concrete must be at least three times the largest aggregate size. The concrete mixture should not be too dry, wet or sticky. High cement content in concrete is recommended for efficient pumping. Aluminium pipes should be avoided as they react with the alkalies present in the cement, liberating hydrogen gas. This causes gas porosity, i.e., the creation of vacancies or voids which reduces the efficiency of pumping.
3) How does the Presence of Admixtures Affect Pumping?
Concrete contains certain ingredients other than cement and water that enhances the pumping process. Accelerators like calcium are added to increase the pumping rate and harden the concrete. Retarders may be used if the environment is warm as they delay the set time of concrete.
4) How does the Outside Weather Influence Pumping Rate?
Concrete is temperature sensitive, which means the surrounding weather plays a pivotal role in determining the rate of concrete pumping. Hot weather increases the demand for water in concrete and causes slump loss. Cold weather decreases the strength and durability of the finished concrete. Both hot and cold weather is detrimental to the finished concrete and hence a moderate temperature is required for operation.
5) Does the Pump Require Maintenance?
Yes. To be able to preserve pumps for long periods careful maintenance is required. It depends on several factors such as the simplicity of the valve design, the number of components in the pump and its wear parts. The pump lasts longer if it is made of durable materials like hard-chrome plated or forged steel pistons. Use lubrication for greasing rusted parts and to ensure optimal life.
6) What are the Safety Precautionary Measures to Follow?
Being careless during the concrete pumping process can lead to fatal accidents. To avoid any mishaps, it is advised to keep these precautions in mind:
Do not open a joining that is under pressure
Do not stand in the face of an open-end discharge
Avoid climbing on hydraulic systems to clean a choked pump line.
Due to the complexity involved in the pumping process and the risks associated with it, it is recommended to approach reputable concrete companies in Edmonton to get the job done. If you feel the need for paving your commercial or residential space with concrete, do get in touch with our pavement experts at Blacktop Paving Inc. With our trustworthy professionals and affordable prices, we offer the most sought-after concrete solutions.