Quiflex® joints for new buildings
The problem
Concrete shrinkage during drying
When a joint construction is placed in new floor slabs, it is subjected to a lot of stress during the first 6 months. Firstly by movement from temperature change, but primarily by shrinkage of the drying concrete.
An oversized joint could compensate for these movements. But since much of the movement is gone after 6 months, the high installation cost would be wasted money. The approach of waiting 6 months to install a joint is also not an option, since the area is usually in use before then.
Concrete slab cupping
In addition to shrinkage, concrete floors also tend to cupping during the drying process: The floor slab bends upward at the edges and thus also at the joints. Built-in joint structures are thus also bent upwards and henceforth represent a high point.
Conventional joint:
2/3 Concrete shrinkage
1/3 „real“ Movement
Concrete cupping
The solution
During the construction of the floor, the QUIFLEX® new construction joint is installed. It consists of the usual metal substructure, which prevents height offset, and two heavy-duty plastic profiles. During the first 6 months, when the concrete does most of its shrinkage and cupping, these provide the joint structure. After that, the two profiles are simply removed and replaced by the QUIFLEX®. This compensates for the increase in height caused by the cupping.
Quiflex® joints for new buildings
The problem
Concrete shrinkage during drying
When a joint construction is placed in new floor slabs, it is subjected to a lot of stress during the first 6 months. Firstly by movement from temperature change, but primarily by shrinkage of the drying concrete.
An oversized joint could compensate for these movements. But since much of the movement is gone after 6 months, the high installation cost would be wasted money. The approach of waiting 6 months to install a joint is also not an option, since the area is usually in use before then.
Conventional joint:
2/3 Concrete shrinkage
1/3 „real“ Movement
Concrete slab cupping
In addition to shrinkage, concrete floors also tend to cupping during the drying process: The floor slab bends upward at the edges and thus also at the joints. Built-in joint structures are thus also bent upwards and henceforth represent a high point.
Concrete cupping
Die Lösung
Beim Bau des Bodens wird die QUIFLEX® Neubaufuge eingebaut. Sie besteht aus der üblichen Metallunterkonstruktion, die einen Höhenversatz verhindert, und zwei hochbelastbaren Kunststoffprofilen. In den ersten 6 Monaten, in denen der Beton den größten Teil seines Schwindens und Schüsselns hat, stellen diese die Fugenkonstruktion dar. Danach werden die beiden Profile einfach ausgebaut und duch die QUIFLEX® ersetzt. Dabei wird die durch das Schüsseln entstandene Erhöhung ausgeglichen.
The advantages
No additional costs in the metal profile
Simple QUIFLEX® installation as the recess is already there
The concrete cupping that has occurred up until then can be compensated for
The QUIFLEX® only has to be dimensioned for real movement, not for concrete shrinkage
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