Light Transmitting Materials in Construction Applications

Summary

Light transmitting materials integrate optical elements within structural matrices to enable daylight penetration, energy savings and novel aesthetic effects in built environments. Common systems include translucent concrete panels embedded with optical fibres, polymer-based light conduits and specialised glazing or aerogel composites. These materials serve multiple functions: harvesting solar radiation for indoor illumination, reducing reliance on artificial lighting, enhancing thermal performance through selective transmission and offering designers new palettes of translucency and form. In façades, flooring or partition walls, light-transmitting concretes maintain structural integrity while channeling diffuse or focused beams to interior spaces. Light-pipe networks and concentrator-based collectors extend daylight into deep-plan buildings and infrastructure such as road tunnels, improving safety and comfort. Emerging developments address trade-offs between optical efficiency, mechanical strength and environmental footprint by optimising fibre volume fractions, matrix compositions and collector geometries. Ongoing research explores eco-friendly binders, novel transparent aggregates and adaptive control systems to maximise daylight harvesting, uniformity and energy-saving potential at scale.

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Light Transmitting Materials in Construction Applications publication trend

The graph below shows the total number of articles in light transmitting materials in construction applications across all publications each year (not limited to Nature Index journals).

Technical terms

Translucent concrete: A composite material in which light-guiding elements such as optical fibres are embedded in a cementitious or resin matrix, allowing controlled light passage through otherwise opaque structural panels.

Optical fibre: A flexible, transparent strand—typically glass or polymer—designed to transmit light by total internal reflection, used to channel daylight through building elements.

Light-pipe: A tubular conduit or assembly of reflective surfaces that captures and transports sunlight from exterior collectors to interior spaces without significant loss.

Daylighting: The practice of using natural sunlight to illuminate building interiors, reducing reliance on artificial lighting and improving occupant comfort.

Light transmittance: The ratio of incident light that successfully passes through a material, expressed as a percentage or fraction, indicating its transparency to visible wavelengths.

References

  1. Daylighting of road tunnels through external ground-based light-pipes and complex reflective geometry. Tunnelling and Underground Space Technology (2023).
  2. Experimental study on 80 MPa grade light transmitting concrete with high content of optical fibers and eco-friendly raw materials. Case Studies in Construction Materials (2023).
  3. Effect of Plastic Optical Fiber on Some Properties of Translucent Concrete. Engineering and Technology Journal (2014).
  4. Experimental Investigation of the Multi-Physical Properties of an Energy Efficient Translucent Concrete Panel for a Building Envelope. Applied Sciences (2020).

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