Biochar-enhanced concrete 3D printing
A biochar-enhanced 3D printable concrete mix is being developed to print architectural-scale items, including benches.
This blend combines the resource efficiency of advanced 3D printing technology with the carbon sequestration of biochar, reducing concrete’s carbon footprint.
Beyond sustainability, biochar can improve concrete’s durability, enhances its thermal insulation and makes it lighter due to its porous structure.
This project showcases the potential for 3D printing and construction to align with sustainable practices. It stands at the intersection of technology, design, and sustainability, illustrating their combined role in mitigating climate change impacts.
The first proposed design is the Burren Bench. It will act as a carbon sink that will hold plant life and biochar enriched substrate. It’s design has been inspired by the renowned Burren landscape in the west of Ireland. It’s form echoes the characteristic limestone pavements of the Burren, which are crisscrossed by cracks known as “grikes,” with flat rocks called “clints” in between. These grikes host a remarkable range of plant life due to the Burren’s unique microclimate and the fertile soil captured within the grikes. Similarly, the clints and grikes of the Burren Bench will provide space for biochar enriched soil so that plant life can flourish.
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Challenge
The decarbonisation of the construction sector
Target group
Concrete manufacturers, Architects, builders, construction sector stakeholders
Solution
Concrete 3d printing with biochar
Innovation
3D printable carbon neutral concrete (net zero or negative emission is the goal – we are still selecting suitable biochars)
Unique Selling Point
3D printed biochar infused concrete lies at the intersection of technological innovation, environmental stewardship, and economic viability. It brings together the best of advanced manufacturing technology and environmental sustainability. This approach could revolutionise the concrete industry and contribute significantly to global efforts to combat climate change.
Feasibility / Transferability
A biochar enhanced concrete 3d printing recipe is knowledge that can be transferred easily to anyone operating concrete 3d printers.
Website: www.futurebrightstudio.ie
by Ray McGreal
9 - Industry, Innovation & Infrastructure
The manufacturing industry exhibited a recovery from the pandemic in 2021, although the rebound has been uneven across countries, with stagnations in least developed countries. Almost one in three jobs in the manufacturing industry were negatively impacted during the pandemic. Higher-technology industries had a better performance and recovered faster, providing a strong example of how important technological innovation is for achieving Sustainable Development Goal 9.
In 2021, global manufacturing activity rose above the pre-pandemic level but the recovery remains incomplete and unequal. Manufacturing in least developed countries stagnated owing to subdued and volatile global demand and disruption to global trade, in addition to tighter domestic economic policies. Despite the pandemic disruptions, the global share of manufacturing value added in total GDP increased from 16.2 per cent in 2015 to 16.9 per cent in 2021. While manufacturing value added per capita in Europe and Northern America reached an all-time high of $5,006 in 2021, in least developed countries it decreased to $134.
Because of the pandemic, nearly one in three jobs in manufacturing supply chains globally are likely to have undergone termination, a reduction in working hours or payment or other worsened conditions. The share of manufacturing employment in total employment thus decreased significantly from 13.7 per cent in 2019 to 13.1 per cent in 2020.
Small industrial enterprises are more vulnerable than larger firms to economic downturns owing to their limited financial resources and greater supply chain dependencies. Although governmental support plays a key role in supporting small enterprises in their efforts to survive and thrive during and after the crisis, such a stimulus is hardly available in low-income countries. Based on survey data from 2006–2020, only 15.7 per cent of small-scale industries in sub-Saharan Africa received loans or lines of credit compared with 44.2 per cent in Latin America and the Caribbean.
Global CO2 emissions declined by 5.8 per cent in 2020 or by almost 2 billion tons, the largest decline since 1990 and almost five times greater than the 2009 decline which followed the global financial crisis. Despite the 2020 decline, global energy-related CO2 emissions remained at 31.5 billion tons, which contributed to the attainment by CO2 of its highest average annual concentration in the atmosphere. In 2021, global energy-related CO2 emissions rose by 6.0 per cent to 36.3 billion metric tons, their highest ever level, as demand for coal, oil and gas rebounded with the economy.
Most of the industries using medium and high technology have reached pre-pandemic levels, except for motor vehicles and other transport equipment. The production of motor vehicles is facing larger challenges worldwide owing to disruptions of the supply chain for resources and intermediate goods. However, the share of medium- and high-technology manufacturing in total manufacturing was only 21.4 per cent in sub-Saharan Africa and 10.5 per cent in least-developed countries, compared with 47.7 per cent in Europe and Northern America in 2019.
11 - Sustainable Cities & Communities
As epicentres of the COVID-19 crisis, many cities have suffered from insufficiencies in public health systems, inadequate basic services, a lack of well-developed and integrated public transport systems and inadequate open public spaces, as well as from the economic consequences of lockdowns. As a result, the pandemic is likely to further increase the number of slum dwellers. In order to improve the lives of over 1 billion slum dwellers, there is an urgent need to focus on policies for improving health, affordable housing, basic services, sustainable mobility and connectivity.
Over the years, the number of slum dwellers has continued to grow and that number was over 1 billion in 2020. Slum dwellers are most prevalent in three regions, which are home to about 85 per cent of the world’s slum residents: Central and Southern Asia (359 million), Eastern and South-Eastern Asia (306 million) and sub-Saharan Africa (230 million).
Data for 2020 from 1,510 cities around the world indicate that on average only about 37 per cent of their urban areas are served by public transport, measured as a walking distance of 500 m to low-capacity transport systems (such as buses and trams) and/or 1,000 m to high-capacity systems (such as trains and ferries). Given variations in population concentrations within those cities, this translates into only about 52 per cent of the world population having convenient access to public transport.
In 2022, the global average municipal solid waste collection rate in cities is at 82 per cent and the global average rate of municipal solid waste management in controlled facilities in cities is at 55 per cent. The municipal solid waste collection rates in sub-Saharan Africa and Oceania are less than 60 per cent. Uncollected waste is the source of plastic pollution, greenhouse gas emissions and incubation for infections.
Data for 2020 from 1,072 cities point to a poor distribution of open public spaces in most regions. In these cities, only about 38 per cent of urban areas are loca ted within a walking distance of 400 m to an open public space, which translates into only about 45 per cent of the global urban population having convenient access to those spaces.
By March 2021, a total of 156 countries had developed national urban policies, with almost half (74) already in the implementation stage. A further breakdown shows that 40 per cent of the countries are in the early stages of developing their plans, while 12 per cent are monitoring and evaluating how well those plans are functioning.
By the end of 2021, a total of 98 countries had reported having local governments with disaster risk reduction strategies, an increase from 51 countries in 2015.
12 - Responsible Consumption & Production
Developing countries bear a large part of the climate, biodiversity and pollution impacts of resource-intensive production processes, without reaping their benefits. This situation has been made worse by the impacts of the pandemic. As part of sustainable global pandemic recovery strategies, the implementation of sustainable consumption and production will maximize the socioeconomic benefits of resource use while minimizing the impacts.
In 2021, 83 policy instruments supporting the shift to sustainable consumption and production were reported by 26 countries, bringing the total number of policies developed, adopted and/or implemented up to 438 (as reported by 59 countries and the European Union for 2019–2021). However, the distribution of reported sustainable consumption and production policies has so far been uneven, with 79 per cent of policies reported by high-income and upper middle income countries, 0.5 per cent by low-income countries and only 7.7 per cent by least developed countries, landlocked developing countries and small island developing States.
The global material footprint continues to grow, although the pace has slowed. The average annual growth rate of the global material footprint for 2015–2019 was 1.1 per cent, compared with 2.8 per cent for 2000–2014, indicating a slowdown in the growth of economic pressure on the environment.
The proportion of food lost globally after harvest on farm, transport, storage, wholesale and processing levels is estimated at 13.3 per cent in 2020, with no visible trend since 2016, suggesting that structural patterns of food losses have not changed. At the regional level, sub-Saharan Africa has the highest proportion of losses at 21.4 per cent, with food being lost in large quantities between the farm and retail levels.
In addition to food loss, it is estimated that 931 million tons of food, or 17 per cent of total food available to consumers in 2019, was wasted at the household, food service and retail levels. Subsequent evidence suggests that household food waste declined during the COVID-19 pandemic lockdowns but has since returned to pre-pandemic levels.
The COVID-19 pandemic aggravated the global pollution crisis, in particular plastics pollution, making the effective implementation of the Basel Convention on the Control of Transboundary Movements of Hazardous Wastes and Their Disposal, the Rotterdam Convention on the Prior Informed Consent Procedure for Certain Hazardous Chemicals and Pesticides in International Trade and the Stockholm Convention on Persistent Organic Pollutants so much more urgent and important. The year 2021 was marked by the establishment of a new global regime for controlling trade of plastic wastes for better transparency and tracing, following the adoption of the plastic waste amendments to the Basel Convention in 2019.
A preliminary analysis from a sample of over 10,000 public companies around the world shows that over 60 per cent of large companies published sustainability reports in 2021, a twofold increase from 2016. The sustainability indicators that are most widely disclosed by companies include direct CO2 emissions, board diversity E/2022/55 22-06472 19/25 and number of board meetings, while the least disclosed indicators include ozone depleting substances, gender pay gap and bribery and fraud controversies.