Austin's ambition to turn its concrete green is hitting snags, with officials citing industry hesitancy and safety protocols as key delays. The shift towards environmentally friendly building materials is a tough mix to get right, with the city now eyeing a 2026 timeline before the low-carbon concrete policy is fully set.
The Office of the City Engineer briefed the Joint Sustainability Committee, revealing that although efforts have been underway since the City Council's resolution last April to mandate lower emissions for cement mixes, only one out of 12 local suppliers has adopted new practices, as per the Austin Monitor. Lauren Concrete, penned by name, has integrated CarbonCure Technologies' method, which sequesters carbon dioxide in the concrete.
With global construction riding high on an 8 percent contribution to greenhouse gas emissions, Austin is zoning in on the cement sector to cut its carbon footprint. In 2023, the city's capital projects spewed nearly 78,700 metric tons of CO2, linking it closely to concerns surrounding the ongoing climate crisis.
Cement production's heat-intensive nature and substantial energy use compound the CO2 release issue. Staffers denote their focus on implementing new protocols and Environmental Product Declaration standards, aiming to cap greenhouse gas emissions to a range between 345 and 380 kilograms per cubic meter of concrete. "We will be dealing with cement for a while," "Moving to that Environmental Product Declaration process, unfortunately there’s just a timeline which we cannot expedite," managing engineer Angela Johnson told the Austin Monitor. "We’re trying to be careful," she added, highlighting the legal balancing act in nudging the industry forward.
Despite these slower steps, the city's commission is pushing for a quicker resolution, as Austin's 2030 emissions goals from its Climate Equity Plan loom closer. Commission Chair Kaiba White suggested in the Austin Monitor interview that the city's plan is too lenient on suppliers. White expressed urgency, stating, "I mean, we’re literally on fire here, right? We can barely keep our grid running because of climate change, and people are dying of heat exposure. It’s serious."
As work progresses, Austin is looking to organizations like the American Concrete Institute and other cities like Portland, which has been ahead of the game with its carbon-neutral concrete program since 2016, for guidance in this critical environmental pivot. The city's engineers expect a year or two of testing before fully integrating new concrete standards into their projects.
