“What’s the difference between jumpform and slipform construction?”.
Well, not a lot actually. Here’s the differences and similarities between construction jump formwork and slipform construction.
What is slipform and jumpform?
Both jumpform and slipform are construction techniques using concrete. They are most often self-climbing forms used in the construction of tall buildings or other large structures. They are often referred to as “climb-form” systems.
How are they similar?
Using either jumpform and slipform techniques, the process is as follows: concrete is poured into self-climbing moulds until the structure reaches the desired height.
By using electrical motors or hydraulic rams for vertical climbing, the need for cranes is completely eliminated or at least reduced. Both techniques utilize work decks or platforms that climb vertically as the forms do for easy access, pouring, and reinforcement at various heights.
Neither jumpform nor slipform construction requires any support from other parts of a building or construction. They are self-supporting by holding themselves up using the concrete that has been previously cast below at other levels or using other built-in support systems.
How are they different?
Construction jump formwork involves a progression of a series of “jumps” of concrete pours. Concrete is poured and set at each level before “jumping” to the next level, ensuring a supportive foundation before progressing to the next level. The jumpform technique is well-suited for applications where any joints in between the levels will be concealed in the final construction of the structure.
The main difference between the two is that the slipform technique uses a structures’ core of shaft for support, and it moves up slowly as concrete is poured in one long, slow pour. Thus, eliminating the need to wait for the concrete to dry and set. It’s considered to be more effective than jumpform, especially for high structures, as it creates a continuous, smooth, and highly precise concrete end product with no joint from jumping.
Which one is the best?
There’s no clear winner. Both of them have their own unique advantages and will perform better/worse under different circumstances. Which one should you pick? Ask a slipform construction service provider near you.