Opportunities and Potential of Pultruded Composite Materials in the Field of Building Energy Conservation

 

The Future of Construction

 

As one of the world’s largest users of energy and raw materials, the construction industry is under great pressure to improve its sustainability. It is estimated that the majority of buildings worldwide are inefficient, with around 75% in Europe, for example, meaning that a large portion of energy is wasted. New materials will be needed to minimize the use of natural resources, achieve a reduced carbon footprint, and promote circular economy practices. Choosing the best materials for durability throughout the life cycle will become increasingly important. A shift to off-site production is also expected, with factory-controlled environments and automated processes improving quality control, reducing waste, and reducing on-site work.

 

Lightweight pultruded components can be pre-assembled in factories into modules or complete structures for faster installation on site. Lightweight profiles reduce energy consumption during transportation and installation, and a longer service life combined with minimal maintenance can reduce the carbon footprint throughout the life cycle.

 

Pultruded components such as profiles, gratings, beams, tubes, and planks are increasingly used in a range of building, construction, and infrastructure applications. For example, bridge decks, fences, stairs and handrails, train platforms, cladding, utility poles, modular building concepts, and window frames.

 

Bridges

One application that offers great growth potential for composites is bridges. Composite bridges are designed to provide a 100-year service life and, unlike steel bridges, do not require regular repainting to protect them from corrosion. In recent years, pultruded fiberglass composites have become a very popular choice for pedestrian and bicycle bridges. Prefabricated “easy-to-install” bridge decks, preassembled bridge modules, and complete bridge “kits” are now available. Corrosion-resistant composite bridges are ideal for use near water or the coast, or in remote areas where regular maintenance is difficult to perform.

 

Composite bridges can provide the same performance as steel structures, but can be 50% lighter or more. This allows for a leaner bridge design with fewer requirements for support structures and foundations, significantly reducing material and energy consumption. Lightweight also results in easier logistics and simplified installation. Pultrusions are easier to transport to the job site, use less fuel, and are easier to move around the site, often reducing labor requirements and lifting equipment capacity.

 

Energy-Efficient Windows and Doors

Fiberglass composites are the material of choice for premium window systems, outperforming wood, PVC, and aluminum alternatives overall. Pultruded window frames offer a service life of over 50 years with minimal maintenance requirements and limit thermal bridging, resulting in less heat transfer through the frame, reducing subsequent condensation and mould problems. Pultruded profiles maintain dimensionally stable and strong even in extreme hot and cold temperatures, and expand and contract at a similar rate to glass, resulting in lower failure rates. Pultruded window systems have very low U-values, which can result in significant energy and cost savings.

 

Insulated Connectors and Structural Assemblies

Insulated concrete sandwich panels are widely used in the construction of modern building facades. The outer concrete layer is often connected to the inner concrete layer with steel rods, but this has the potential to form thermal bridges, allowing heat to transfer between the interior and exterior of the building.

 

When high insulation values ​​are required, the steel connectors are replaced with pultruded composite rods, which “break” the heat flow and increase the U-value of the finished wall. The easy-to-install composite connectors are corrosion-resistant and suitable for supported and self-supporting facades, can accommodate different insulation thicknesses and facilitate the use of large panel sizes.

 

To prevent thermal bridging when connecting rainscreen cladding to insulated and non-insulated substrate walls of concrete or brick, composite fasteners have an integrated stainless steel threaded rod on one end to facilitate connection to the framing of the cladding. For applications such as cantilevered balconies, where significant energy loss would result if the connection passed through the insulation, structural insulation solutions are used.

 

These load-bearing insulated elements often combine steel reinforcement with insulation materials such as EPS foam. Composite tie rods replace steel reinforcement in products designed for maximum insulation performance. Lightweight, shorter tie rods reduce assembly weight and size for ease of installation.

 

Shading Systems

Solar heat gain through extensive glazing areas can cause overheating inside buildings, necessitating the installation of energy-intensive air conditioning. Brise soleil (“sunscreen”) on the exterior of buildings can control the amount of sunlight and heat entering a building and can reduce energy demand. Architects are also increasingly using “solariums” as a design feature to create custom facades for commercial, public and residential developments.

 

A wide variety of designs and building materials are possible. High strength and stiffness, lightweight materials that are easy to install, corrosion resistance and low maintenance requirements, as well as dimensional stability over a wide temperature range, make pultruded composites an attractive alternative to traditional building materials.

 

Around 750 pultruded sunglass profiles were installed during the façade renovation of the Guynemer building in Issy Les Moulineaux, Paris. The profiles, which include three different geometries and range in length from 0.5 to 13 meters, were bonded to specially designed aluminum pieces to connect to the façade.

 

Building A Sustainable Future

The impact of embodied carbon (the carbon associated with materials and construction processes throughout a building’s lifecycle) will become more significant as carbon emissions in operations are reduced through improved energy efficiency and the use of renewable energy.

 

An increasing number of life cycle assessment (LCA) and life cycle costing (LCC) studies show that composites offer sustainable and economic benefits over their entire life cycle compared to traditional building materials, especially in demanding environmental conditions.

 

Lightweight, corrosion-resistant pultruded profiles require less energy for transportation and installation, require less maintenance resources over a longer service life, and can be designed with thin walls and components for efficient use of materials.

 

Huge Potential in the Pultrusion Market

According to the latest report by GlobeNewSwire, the global pultrusion market has a promising outlook, with opportunities in the fields of construction, wind energy, transportation, electrical and electronics, and consumer goods.

 

The global pultrusion market is expected to reach US$5.9 billion by 2028, with a compound annual growth rate of 5.2% from 2022 to 2028. The main growth driver of this market is the increasing demand for lightweight, corrosion-resistant and durable products in various end-use industries, especially in the construction field