Pocket Isolator™ by NJM Group
Pocket Isolator™ or form guards by NJM Group are a “leave-in-the-slab” solution to protecting columns, pillars and poles – prior to pouring concrete – from exposure to moisture migration and its harmful effects on the anchor bolts, grout bed, base plate and lower segments of the vertical structure. They can be used for a variety of different applications such as supermarkets, shopping centres, apartment complexes, commercial developments and warehouses.
Form guards are made from 100% Virgin High Density Polyethylene (HDPE). HDPE is a thermoplastic made from recycled plastic with a large strength-to-density ratio. It does not bond to concrete and is corrosion-resistant and long-lasting.
Square form guards
The NJM Group pocket isolator is a square, four-piece construction.
It creates a barrier between the inner and outer concrete pours to protect the base of a column, pillar or pole. It has the ability to accommodate different coloumn and pole diameters. The standard size is 770mm(l) x 290mm(h) x 65mm(w).
The grid framework on the external of the pocket isolator allows for increased reinforcement as the concrete will mould into each section. The bolts are fastened on the outside to create a more secure structure. The form guard is 60mm thick, so concrete will not leak in or out. This allows for successful simultaneous slab and pocket isolator casting.
Square form guards are versatile. Their straight sides allow for extension of the standard dimensions. It achieves a smooth surface finish with cleaner edges. However, custom made circular form guards are also an option.
Circular form guards
Circular form guards are simplistic and convenient, and they are more precise when used for circular columns. They are also faster to assembly as there is only two points to secure, not four. They are custom manufactured for large projects.
Pocket isolators constructed from HDPE are also environmentally sustainable. They are constructed from recycled plastic unlike the wooden counterparts where thousands of trees are cut down each year in order to produce this temporary formwork. Using a pocket isolator™ made from recycled material will not only benefit you cost-wise, but it will also contribute to preventing deforestation.
Read more about the benefits of pocket isolator™ by NJM: