Although the circular economy involves other principles such as the regeneration of natural systems, the reuse or recycling of materials plays an important role in contributing to the reduction of waste generation by giving a second useful life to elements that could be considered waste. Wood, metal sheets, bricks, and stones, among others, can be reused, bringing sustainability and efficiency criteria to the projects, helping to consolidate this concept that still has a long way to go.
Within the Latin American territory, many architecture professionals have proposed to apply in their design and construction processes the implementation of strategies that collaborate with the use of resources, either by reusing, recycling, or restoring different materials and elements in search of satisfying the needs and concerns of those who inhabit the spaces.
Sustainability is much more than simply deciding for or against a specific product. It is a concept that must be integrated into the way we build and design architecture, as well as the intelligent use of existing buildings and their potential renovations. From a sustainability perspective, demolishing an old building is just as unsustainable as building a new one. Both use large amounts of embodied energy that can be avoided when all planning parties consider new ways of working and collaborate more closely.
In this sense, the efficient use of raw materials and the reduction of waste for reuse is essential. Polycarbonate in façades, for example, has a life cycle of at least 20 years on average and can be recycled and reused in many ways, thus doubling its useful life until it can no longer be usefully recycled.
Sustainability needs to go further beyond inspiring speeches and promises, with visible, concrete actions. In order to see this change, it is essential for individuals, companies and governments to take responsibility and act in a sustainable manner in their daily lives and practices. By taking into account the environmental and social impacts of their decisions and seeking more conscious and responsible alternatives, they can take steps to ensure a sustainable future for the next generations. In the construction industry this is even more urgent. Responsible for a large amount of solid waste and greenhouse gas emissions, it is essential for this industry to adopt sustainable practices, such as recycling, to minimize environmental impacts.
However, even though product recycling processes have significantly advanced in recent years, there are still certain challenges associated with the use of recycled materials. This is due to a variety of factors, such as performance and durability, or even due to the difficulty of obtaining suitable raw materials. But there are also successful examples that show the possibilities of recycled materials.
“Our planet is choking in plastic,” states the United Nations. While the man-made material has many valuable uses, our addiction to single-use plastic products has led to severe economic, health and environmental issues. Roughly one million plastic bottles are purchased every minute, and five trillion plastic bags are used every year worldwide –used just once, then thrown away. Plastics and microplastics have found their way into every corner of our natural environment, from the peaks of the highest mountains to the depths of the deepest oceans. So much so, that they have become part of the Earth’s fossil record and created an entirely new marine microbial habitat known as the “plastisphere.”
Students at the School of Engineering, RMIT University recently published a study experimenting with a new form of waste management and recycling. As they note in their research, cigarette butts are the most commonly discarded single waste item in the world, with an estimated 5.7 trillion having been consumed around the globe in 2016. However, the materials in cigarette butts—particularly their cellulose acetate filters—can be extremely harmful to the environment due to poor biodegradability. The RMIT study builds on a previous research study by Mohajerani et. al (2016) that experimented with adding discarded cigarette butts to clay bricks for architectural use. In their research, the RMIT students found that such a measure would reduce the energy consumption of the brick production process and lower the thermal conductivity of the bricks, but that other issues including bacterial contamination would have to be addressed prior to successful implementation. Below, we explore this research in more detail, investigating its relevance to the architecture industry and imagining possible futures of application.
https://www.archdaily.com/956164/is-it-possible-to-create-lightweight-bricks-by-recycling-cigarette-buttsLilly Cao
According to a survey by the Brazilian Association for Recycling of Construction and Demolition Waste (ABRECON), there has been an increase in the recycling of construction and demolition waste (C&D) in Brazil in recent years. According to the 2015 report, 21% of the total C&D was recycled in the country that year, while in 2013 the rate was 19%.
The outlook is promising but not yet ideal, and the growth of recycled C&D materials is still considered small. In Brazil, construction waste can represent between 50% and 70% of the total municipal solid waste. This means, we still need to advocate for a more common practice of material recycling and reuse in architecture, especially in Brazil.
Recycling and reusing in civil engineering is extremely important, especially when considering the amounts of waste production and energy consumption involved in the processes related to the construction site. Creating construction elements by re-designing the role of old objects or materials represents an objective approach to upcycling, as a path towards a more sustainable and responsible future.
Agriculture and the food industry seem to have little in common with architecture, but it is precisely the overlap of these three areas that interests Ghanaian-Filipino scientist and architect Mae-ling Lokko, founder of Willow Technologies based in Accra, Ghana. Working with recycling agricultural waste and biopolymer materials, Lokko searches for ways to transform the so-called agrowaste into building materials.
While circular economy is often discussed in relation to the architectural object through the lens of material recycling, design for disassembly, and material passports, the framework is most fully enacted at the neighbourhood and city scale. Whether it is visions of circular communities that hint at some level of self-sufficiency or policies set in motion by cities, urban-scale projects exemplify the guiding principles of the circular economy, providing a glimpse into what a fully-fledged version of it might look like. The following explores the strategies used in circular urban environments, from architecture and construction materials to energy production, waste management and food production, as well as the processes and operations that govern these designs, providing insights into the conditions that inform circularity.
Casa Collage / S+PS Architects. Image Cortesia de S+PS Architects
Reform and adaptation of spaces represent a significant parcel of projects ordered to architecture firms, and reuse of preexisting structures is not newness. Functions and needs change over time, therefore adaptations are required to meet new demands. However, no matter how much the maintenance of a building is, in most cases, preferred in economic and ecological sense to its demolition and a new construction from the beginning, the logic of the reuse of a space does not usually extend to its parts that become, thus, rubble.
It is believed that copper was the first metal to be found by men and used in the manufacture of tools and weapons. This occurred in the last period of prehistory, more than 10,000 years ago, in the so-called Metal Age, when groups, until then nomadic, started to become sedentary, developing agriculture and starting the first urban settlements. Copper has since been used in diverse ways. Used for decorative objects, jewelry, automotive parts, electrical systems, and even for dental amalgams, the material has had huge demand. In architecture, copper coatings are greatly appreciated for their aesthetics and durability. But a factor worth mentioning is that copper can be recycled infinitely, practically without losing its properties.
Plastic is an incredible material. The big problem with it is how we are using it and discarding it in nature. It was with this idea in mind that The Plastic Museum was created: to show the vital role that plastic plays in our lives and the possibilities that its reuse and recycling offer. Opened in Madrid on May 8, it not only contains plastic but was built entirely from this material. Through the artifacts displayed inside, including objects for health care, communication, construction, food, and sustainable mobility, the visitor will learn about the essential functions that plastic provides us when used correctly.
The roof of Euston Station in London is the large-scale architectural setting for the virtual application of the comprehensive Metaplas system, created by students from the Bartlett School of Architecture, UCL. As part of an investigation carried out in Research Cluster 8 (RC8) of the Master's program in Architectural Design, students developed a 3D printed multimaterial system from biodegradable and recyclable thermoplastics. Transforming a series of flat panels into complex three-dimensional forms, students created a structural system with geometric folds that allows for passive control of the lighting of interior spaces.
The Shing Mun River in Sha Tin, a residential town in Hong Kong, has struggled with plastic waste pollution for years. Household waste that is not properly recycled will either end up in landfills or floating in the river. In 2018 almost 17 million plastic items, or 40,000 items daily, were found to be drained into the ocean via the Shing Mun River, mostly being food packaging, cutleries, and household plastic bottles. This quantity of plastic pollution in the river and surrounding environment could eventually jeopardize the natural ecosystem irreversibly.
Newly built houses, with their sizable carbon footprints, don’t just contribute to climate change. For many Americans, they’re also too expensive—a bitter irony in cities rife with vacant buildings and record evictions.
Given the urgency of both issues, projects that retrofit livable housing into existing low-carbon shells (the initial embodied carbon was spent long ago) might be worth a closer look. We searched for them and came across a handful that promise a cure for housing insecurity and excessive greenhouse gas emissions.
When a material runs its course and becomes obsolete, whether because of wear and tear, a change of style, a tear-down, or a remodel, many are tempted to simply toss it into a scrap heap and send it to the landfill. In the grand majority of cases, however, these materials can be repaired, recycled, and reused in a vast array of creative endeavors. Of course, depending on the material and its characteristics, this can also present a challenge. In the case of windows and doors, particular care must be taken to keep them intact throughout the dismantling or demolition process and even afterwards, an inspection may be necessary to determine their viability for future use. Of course, many avoid the path of re-utilization altogether and opt for new materials that make for an easier and more uniform project.
As levels of pollutant emissions have increased over the years, awareness has also grown regarding actions that can be taken to minimize the damage caused to the planet. As a way to promote waste reduction or prevention, the 3 R's rule is created: reduce, reuse and recycle. These actions, together with sustainable consumption standards, have been promoted as a means to protect natural resources and minimize waste.
With the aim of supporting architects to become active agents of sustainable design, this week we present a selection of facades that incorporate different recycled materials. Beyond the typical uses of plastic and glass, in this article, you will find innovative materials such as mattress springs, ice cream containers, plastic chairs, and recycled waste from agricultural and industrial products. A look at 21 remarkable projects using recycled materials to create an attractive facade.
.jpg?1600352094 "Flamboyant Residence / Perkins+Will. Image: © Nelson Kon")
