Expansion joints

New Poona Concrete System – Expansion joints for buildings, internal and external areas.

Expansion joints prevent structural corrosion and damage to surfacing

Movements resulting from thermal
expansion and loading changes must be
The lengths of structural elements, and of
superstructures in particular, change as a
result of materials shrinkage, temperature
fluctuations and loading variations
– perhaps many times in the course of
their lives. To avoid surface cracking and
possibly more serious damage, the length
of each individual structural element is often
limited, with gaps between elements
to allow movements. These gaps must be
bridged over, and made trafficable if appropriate,
in every state of expansion. Expansion
joints of steel or aluminium offer
well-proven solutions. These facilitate variations
in length without constraints and
cracking, protect the surfaces of adjacent
structural elements, and, if necessary,prevent the ingress of water.

Corrosion damage to the underside of a slab in a multi-storey car park, resulting from a poorly executed, non-watertight expansion joint

Watertightness is a key requirement
The water-tightness of an expansion joint
is determined not only by that of the joint
itself but also by that of its connection
to the waterproofing system of the supporting
structure at each side. Details such
as wall connections and T-joints present
potential weak points and must be made
just as watertight as the rest of the joint.
Water is unforgiving of half-hearted solutions.

Serviceability can be affected
Cracking of a structure or its surfacing,
or ingress of water, can lead to serious
structural damage, and may result in consequential
damages such as interruption
of production and warehousing or water
damage to goods.

Damage to surfacing resulting from the lack of an expansion joint

Solutions for all applications

Retail space
The shopping experience should not be tarnished by unattractive structural details. New Poona Concrete System offers aesthetically pleasing, well-proven solutions for expansion joints in floors, walls and ceilings. A wide range of colours is available, and the profiles can be fabricated from various materials. Stainless steel, corrosion-protected steel and aluminium are durable, high-quality materials that can be seamlessly integrated into any architectural concept. Are you interested in special surfaces or colours? We can make it possible. Contact us!

Manufacturing and storage areas

Fork-lift trucks, whether with hard or air-filled tyres, subject expansion joints to very high loading. Leaking water, joints which can only be driven across with care  (if at all), and spalling edges of connecting surfacing can become a source of lasting inconvenience for operations. In such cases, New Poona Concrete System’s durable solutions for such highly loaded flooring are called for. Significant consequential costs resulting from damage to goods and interruptions
to operations can thus be avoided. New Poona Concrete System also offers comprehensive professional condition assessments and support in determining appropriate solutions.

Office and residential buildings

Carpets, parquet flooring, linoleum and other surfacing materials must be split at the structure’s expansion joints. The edges of the surfacing materials are weak points and can thus be subjected to only minimal mechanical demands. New Poona Concrete System offers solutions which satisfy the highest aesthetic demands, as demonstrated by many hotel reference projects. These joints with small movements are considered by many to be technically simple and are thus often underestimated. However, they can be subjected to high loading from rolling suitcases, file trolleys and so on.

Multi-storey car parks and access ramps

Multi-storey car parks and access ramps present particular challenges for expansion joints. Joints must be watertight and resistant to significant chemical contamination from de-icing salt, petrol and oil. In external areas they must also be able to withstand all kinds of weather. The German concrete and construction technology association (DBV) recommends that horizontal joints should be continued in vertical direction without any offset. For this, New Poona Concrete System offers well-conceived detail solutions which can enable every transition and change of direction to be created with the same high quality. By combining expansion joint and drainage as one, costs and space can be saved. Compression joint profiles can be combined with horizontal joints. This may lead to significant savings in costs and installation time.

Laboratories, hospitals and the food processing industry

Hygiene is of paramount importance in hospitals, laboratories and food processing facilities. Therefore, New Poona Concrete System has developed, together with its partners, solutions which enable the expansion joints used in such buildings to be easily and thoroughly cleaned, and where demands are especially high, to have their insert profiles easily replaced as often as necessary. This is achieved by the use of flat-topped inserts and high-quality metal, and by innovative joint designs.

Trans-shipment centres and chemical or pharmaceutical plants

Chemicals can quickly cause damage to the inserts of expansion joints, resulting in diminished fitness for purpose – if the material used is not carefully selected. Resistance to chemical substances must therefore be properly considered. For insert profiles, New Poona Concrete System uses only selected highly-resistant materials, and for the supporting edge profiles, high-quality stainless steel. We will be happy to support you in selecting an expansion joint to suit your needs.