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Pollution-Eating Concrete and Geothermal Systems in a Communal Gathering Space

Author:
Naomi Taniguchi
Pollution-Eating Concrete and Geothermal Systems in a Communal Gathering Space
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Constructed with pollution-eating concrete and equipped with geothermal systems, the building serves as a central gathering space designed to foster community interaction and environmental awareness.
5 key facts about this project
01
Pollution-eating concrete actively reduces air pollutants.
02
A central oculus illuminates the main hall and connects to nature.
03
Fixed concrete benches promote communal interaction without clutter.
04
Geothermal systems enhance energy efficiency for heating and cooling.
05
Extensive glass walls create transparency and visual connectivity.

The Spirala Community Home is designed as a gathering place for people from various backgrounds. Located in a landscape that blends agricultural fields with natural elements, the building focuses on fostering social connections among residents. The concept emphasizes a central hub where community activities take place, supporting an environment of inclusivity and shared experiences.

Main Hall and Oculus

At the heart of the Spirala Community Home is the main hall, a spacious area intended for activities like gatherings, performances, and workshops. This hall features extensive glass walls, which allow abundant natural light to fill the space and create a connection with the outdoors. A central oculus sits above the hall, drawing attention upward and enhancing the feeling of openness. This design element not only serves a functional purpose by illuminating the area but also invites users to appreciate the sky above.

Circulation and Interaction

The circulation spaces around the main hall are thoughtfully designed to allow easy movement for all visitors. These pathways connect different parts of the building, making it accessible for everyone. Minimal interior partitions encourage a sense of openness, while fixed concrete benches create informal seating that promotes social interaction without overwhelming the space with additional furniture. This setup invites community members to engage comfortably with one another, fostering a welcoming atmosphere.

Sustainability and Material Use

Sustainability plays a significant role in the Spirala Community Home’s design. The building incorporates pollution-eating concrete in its foundational and supporting walls. This type of concrete actively works to break down air pollutants using a chemical process activated by sunlight. Additionally, electrochromic glass is used to manage the amount of solar energy entering the building, contributing to energy efficiency by minimizing reliance on heating and cooling systems. A geothermal heating and cooling system further enhances sustainability, while solar panels provide necessary power, aligning with modern ecological goals.

Site Integration and Nature

The design successfully integrates the community home with its natural surroundings. Olive and fig trees are carefully placed around the site, enriching the landscape while establishing a visual and physical connection to nature. The design considers ecological responsibility, creating an inviting atmosphere that encourages residents to engage with both the building and the outdoors. The round shape of the building enhances this relationship, allowing for various outdoor experiences that promote interaction among users and the natural environment.

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The Buildner’s Unbuilt Award 2025: Celebrating Architectural Creativity and Visionary Unbuilt Designs with a Total Prize Fund of €100,000

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The Buildner’s Unbuilt Award 2025 is an international architecture competition dedicated to recognizing and celebrating the value of unrealized architectural designs. It invites architects, designers, and students worldwide to submit visionary projects that have not yet been constructed, highlighting the power of ideas and the creativity behind the design process. By focusing on unbuilt work, the competition aims to bring forward concepts that shape the future of architecture and push the boundaries of the profession. 

Participants can compete in three categories based on project scale: Small Wonders (up to 100 m²), Medium Marvels (101–999 m²), and Large Visions (over 1,000 m²). Each category winner will receive €20,000, and additional prizes include honorable mentions, student awards, and a special Best Presentation Award. Winning projects will gain significant international exposure through Buildner’s publicity campaign and a feature article on ArchDaily, providing a unique opportunity to showcase creative ideas to a global audience. 

The Buildner’s Unbuilt Award 2025 encourages entrants to submit any type of unbuilt project, from conceptual visions to detailed designs, celebrating bold innovation without the constraints of realization. Important deadlines: registration closes on October 30, 2025; submissions are due by November 20, 2025; winners will be announced on December 17, 2025.

Buildner's Unbuilt Award 2025

Celebrating your unbuilt architecture visions with a €100,000 prize

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 October 2025

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