Canadian company creates concrete from carbon dioxide in the air
<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="Concrete’s omnipresence is undeniable and roughly 70 per cent of the world’s population lives in a structure that contains this material. Most of our built environment, including homes, schools, hospitals and buildings, was created with concrete because of its strength and relatively cheap cost. It is also incredibly versatile, which is why it is the second most widely used substance on Earth after water.” data-reactid=”28″>Concrete’s omnipresence is undeniable and roughly 70 per cent of the world’s population lives in a structure that contains this material. Most of our built environment, including homes, schools, hospitals and buildings, was created with concrete because of its strength and relatively cheap cost. It is also incredibly versatile, which is why it is the second most widely used substance on Earth after water.
This use has come at a cost.
<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="The concrete industry is one of the biggest sources of greenhouse gas emissions globally and generates the most carbon dioxide (CO2) emissions per dollar of revenue. Approximately 8 per cent of humanity’s carbon footprint comes from concrete and the only sources of greenhouse gases that are higher come from coal, oil and gas.” data-reactid=”30″>The concrete industry is one of the biggest sources of greenhouse gas emissions globally and generates the most carbon dioxide (CO2) emissions per dollar of revenue. Approximately 8 per cent of humanity’s carbon footprint comes from concrete and the only sources of greenhouse gases that are higher come from coal, oil and gas.
<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="Most of the greenhouse gas emissions from concrete come from manufacturing cement, which is concrete’s primary ingredient. Limestone and clay are heated to 1,400°C to start the calcination process, which releases 50 per cent of concrete’s carbon emissions. The fossil fuels that heat the limestone account for 40 per cent and the fuel used for mining and transporting the concrete make up 10 per cent of the carbon emissions.” data-reactid=”31″>Most of the greenhouse gas emissions from concrete come from manufacturing cement, which is concrete’s primary ingredient. Limestone and clay are heated to 1,400°C to start the calcination process, which releases 50 per cent of concrete’s carbon emissions. The fossil fuels that heat the limestone account for 40 per cent and the fuel used for mining and transporting the concrete make up 10 per cent of the carbon emissions.
<h3 class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="TRAP THE CARBON INSTEAD” data-reactid=”32″>TRAP THE CARBON INSTEAD
<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="Our reliance on concrete won’t disappear anytime soon, so CarbonCure, a Canadian cleantech company, designed a technology that injects captured CO2 from the air to permanently store it in concrete.” data-reactid=”33″>Our reliance on concrete won’t disappear anytime soon, so CarbonCure, a Canadian cleantech company, designed a technology that injects captured CO2 from the air to permanently store it in concrete.
The company sources CO2 from industrial gas suppliers, which is then injected into wet concrete during the mixing process. As the materials are mixed, the CO2 undergoes a mineralization process that converts the gas into nano-sized minerals that strengthen the concrete and reduces the amount of cement needed. This procedure comes without compromising performance.
carboncure concrete
<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="Concrete made with CarbonCure technology was used to build the East Deicing Apron at Calgary International Airport in 2019. Credit: CarbonCure” data-reactid=”46″>Concrete made with CarbonCure technology was used to build the East Deicing Apron at Calgary International Airport in 2019. Credit: CarbonCure
“By using CarbonCure and manufacturing CO2 mineralized concrete, producers reduce the carbon footprint of their concrete by an average of 4-6 per cent,” said CarbonCure during an interview with The Weather Network.
“Every cubic metre of CO2 mineralized produced with CarbonCure reduces carbon emissions by 17 kg; so an average building made with CO2 mineralized concrete would reduce CO2 emissions by approximately 120,000 kg. That’s equivalent to the carbon absorbed by 160 acres of forest in a year, or the emissions generated from driving 480,000 km.”
CarbonCure was founded in Halifax, Nova Scotia in 2012 and has since contributed to several large-scale projects using its technology, including the construction of one of its own buildings. Four years after the company formed, the Ambassatours Headquarters was built with 93,900 kg of CO2 that was captured from the air.
Another notable project that saved an impressive 160,000 kg of CO2 is the East Deicing Apron at the Calgary International Airport, which is equivalent to 85 hectares of forest absorbing CO2 in a one year period. The new centralized deicing pad was built in 2019 and involved the second-largest pour of CarbonCure concrete in a single project and the largest quantity to be used at a Canadian airport.
<h3 class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="CONCRETE PRODUCTION EXPECTED TO GROW” data-reactid=”56″>CONCRETE PRODUCTION EXPECTED TO GROW
Experts predict that growth in concrete production will coincide with global urbanization and economic development, which is why sustainable alternatives are needed to lower its exorbitant impact on the climate.
<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="A study conducted by McKinsey & Company found that scaling innovative technologies can help the concrete industry reduce its 2017-level CO2 emissions by over 75 per cent by 2050. The company says that concrete will likely remain the top construction material globally due to the availability of limestone and cement, but the COVID-19 pandemic is providing opportunities for alternative sustainable materials.” data-reactid=”58″>A study conducted by McKinsey & Company found that scaling innovative technologies can help the concrete industry reduce its 2017-level CO2 emissions by over 75 per cent by 2050. The company says that concrete will likely remain the top construction material globally due to the availability of limestone and cement, but the COVID-19 pandemic is providing opportunities for alternative sustainable materials.
“As players address the challenges of uncertain demand, they have an opportunity to reset strategies: identifying the best path toward decarbonization, assessing digital and technological advancements to invest in, and rethinking their products, portfolios, partnerships, and construction methodologies—areas we explore later,” McKinsey & Company states.
“Forward-thinking players could have an opportunity to leapfrog and become the industry front-runners.”
The study concludes that innovative approaches, including new technologies and alternative building materials, will be “indispensable” to achieve carbon reduction targets by 2050.
NAIROBI, Kenya (AP) — The body of Ugandan Olympic athlete Rebecca Cheptegei — who died after being set on fire by her partner in Kenya — was received Friday by family and anti-femicide crusaders, ahead of her burial a day later.
Cheptegei’s family met with dozens of activists Friday who had marched to the Moi Teaching and Referral Hospital’s morgue in the western city of Eldoret while chanting anti-femicide slogans.
She is the fourth female athlete to have been killed by her partner in Kenya in yet another case of gender-based violence in recent years.
Viola Cheptoo, the founder of Tirop Angels – an organization that was formed in honor of athlete Agnes Tirop, who was stabbed to death in 2021, said stakeholders need to ensure this is the last death of an athlete due to gender-based violence.
“We are here to say that enough is enough, we are tired of burying our sisters due to GBV,” she said.
It was a somber mood at the morgue as athletes and family members viewed Cheptegei’s body which sustained 80% of burns after she was doused with gasoline by her partner Dickson Ndiema. Ndiema sustained 30% burns on his body and later succumbed.
Ndiema and Cheptegei were said to have quarreled over a piece of land that the athlete bought in Kenya, according to a report filed by the local chief.
Cheptegei competed in the women’s marathon at the Paris Olympics less than a month before the attack. She finished in 44th place.
Cheptegei’s father, Joseph, said that the body will make a brief stop at their home in the Endebess area before proceeding to Bukwo in eastern Uganda for a night vigil and burial on Saturday.
“We are in the final part of giving my daughter the last respect,” a visibly distraught Joseph said.
He told reporters last week that Ndiema was stalking and threatening Cheptegei and the family had informed police.
Four in 10 women or an estimated 41% of dating or married Kenyan women have experienced physical or sexual violence perpetrated by their current or most recent partner, according to the Kenya Demographic and Health Survey 2022.
TEL AVIV, Israel (AP) — A rare Bronze-Era jar accidentally smashed by a 4-year-old visiting a museum was back on display Wednesday after restoration experts were able to carefully piece the artifact back together.
Last month, a family from northern Israel was visiting the museum when their youngest son tipped over the jar, which smashed into pieces.
Alex Geller, the boy’s father, said his son — the youngest of three — is exceptionally curious, and that the moment he heard the crash, “please let that not be my child” was the first thought that raced through his head.
The jar has been on display at the Hecht Museum in Haifa for 35 years. It was one of the only containers of its size and from that period still complete when it was discovered.
The Bronze Age jar is one of many artifacts exhibited out in the open, part of the Hecht Museum’s vision of letting visitors explore history without glass barriers, said Inbal Rivlin, the director of the museum, which is associated with Haifa University in northern Israel.
It was likely used to hold wine or oil, and dates back to between 2200 and 1500 B.C.
Rivlin and the museum decided to turn the moment, which captured international attention, into a teaching moment, inviting the Geller family back for a special visit and hands-on activity to illustrate the restoration process.
Rivlin added that the incident provided a welcome distraction from the ongoing war in Gaza. “Well, he’s just a kid. So I think that somehow it touches the heart of the people in Israel and around the world,“ said Rivlin.
Roee Shafir, a restoration expert at the museum, said the repairs would be fairly simple, as the pieces were from a single, complete jar. Archaeologists often face the more daunting task of sifting through piles of shards from multiple objects and trying to piece them together.
Experts used 3D technology, hi-resolution videos, and special glue to painstakingly reconstruct the large jar.
Less than two weeks after it broke, the jar went back on display at the museum. The gluing process left small hairline cracks, and a few pieces are missing, but the jar’s impressive size remains.
The only noticeable difference in the exhibit was a new sign reading “please don’t touch.”
VICTORIA – The British Columbia government is partnering with a bear welfare group to reduce the number of bears being euthanized in the province.
Nicholas Scapillati, executive director of Grizzly Bear Foundation, said Monday that it comes after months-long discussions with the province on how to protect bears, with the goal to give the animals a “better and second chance at life in the wild.”
Scapillati said what’s exciting about the project is that the government is open to working with outside experts and the public.
“So, they’ll be working through Indigenous knowledge and scientific understanding, bringing in the latest techniques and training expertise from leading experts,” he said in an interview.
B.C. government data show conservation officers destroyed 603 black bears and 23 grizzly bears in 2023, while 154 black bears were killed by officers in the first six months of this year.
Scapillati said the group will publish a report with recommendations by next spring, while an independent oversight committee will be set up to review all bear encounters with conservation officers to provide advice to the government.
Environment Minister George Heyman said in a statement that they are looking for new ways to ensure conservation officers “have the trust of the communities they serve,” and the panel will make recommendations to enhance officer training and improve policies.
Lesley Fox, with the wildlife protection group The Fur-Bearers, said they’ve been calling for such a committee for decades.
“This move demonstrates the government is listening,” said Fox. “I suspect, because of the impending election, their listening skills are potentially a little sharper than they normally are.”
Fox said the partnership came from “a place of long frustration” as provincial conservation officers kill more than 500 black bears every year on average, and the public is “no longer tolerating this kind of approach.”
“I think that the conservation officer service and the B.C. government are aware they need to change, and certainly the public has been asking for it,” said Fox.
Fox said there’s a lot of optimism about the new partnership, but, as with any government, there will likely be a lot of red tape to get through.
“I think speed is going to be important, whether or not the committee has the ability to make change and make change relatively quickly without having to study an issue to death, ” said Fox.
This report by The Canadian Press was first published Sept. 9, 2024.
