The JRI+ is made of polypropylene trays, alternating and joined laterally to each other. The procedure includes a rubber, mounted on top of the joints, which facilitates the formation of the crack and prevents the arrival of water to the concourse. This rubber, attached to the device at the top, eliminates the need for the traditional cutting and sealing. The purpose of these trays is to support the free edges resulting from shrinkage of the concrete pavement to permanently transfer the loads between adjacent slabs. The concrete implementation is continuous and the grade obtained flush without jump in the joints; edges are supported and sealed preventing the pumping of fine (pumping). Whith this system, a general problem in pavement construction is solved. Therefore, the scope of the system covers all concrete works: linear, surface or volumetric. The application is for the pavement transverse joints and the longitudinal joints placed on edges. Optionally it can also be used as the extended inner longitudinal joint of concrete.
The JRI+ is made of polypropylene and placed embedded in the concrete, it is not assailable (heavy duty long life) always functionally working under compression. The joints are embedded into the fresh concrete ( see procedure ). Therefore the cracks are controlled and they form along the weak line created in the concrete. In the case of streets, small esplanades or short stretches of road the procedure of execution of works will be manual. ( See manual procedure ).
Cracks are waterproof thanks to the rubber seal placed on the joint. The total height of the joint is less than the thickness of the slab in the transverse joints. This alternating support generates horizontal platforms that are responsible for load transfer. Each slab is supported by the slabs surrounding it. Not anchored to the ground. Positioned on the fresh concrete ready to be embedded by a pusher provided with vertical needle vibrators. It prevents shouldering between adjacent slabs. It also prevents slab breaking edges.