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Scientists Discover a Genius Use For Leftover Steel Waste – And It Could Save Lives : ScienceAlert (opens in a new tab)

sciencealert.com · 2026-10-02

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Claim 1 of 5Not checkedA new analysis suggests that replacing conventional urban pavement with roads made partly from recycled steel slag could substantially cut greenhouse-gas and air-pollution emissions while also reducing road maintenance.View evidenceHide evidence

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Claim 2 of 5Not checkedThe researchers modeled steel slag epoxy asphalt mixtures with 20%, 35%, and 50% epoxy, and found that the 35% epoxy formulation was the best balance in their scenarios.View evidenceHide evidence

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Claim 3 of 5Not checkedWhen scaled to China’s urban road network, the model projected reductions of about 1.74 billion tonnes of CO2-equivalent emissions and 1.23 billion kilograms of PM2.5 at the highest replacement level, along with 31,802 to 128,980 avoided premature deaths and 3.48–15.01 trillion Chinese Yuan in savings.View evidenceHide evidence

As stated1.74 billion tonnes CO2-equivalent; 1.23 billion kilograms PM2.5; 31,802 to 128,980 premature deaths; 3.48–15.01 trillion Chinese Yuan

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Claim 4 of 5Not checkedThe article says the health estimates come from a model linking PM2.5 reductions to established mortality relationships, and that the authors present them as system-level estimates rather than precise epidemiological predictions.View evidenceHide evidence

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Claim 5 of 5Not checkedThe story notes important limitations: steel slag is not produced evenly across China, transport between provinces adds emissions, current industrial infrastructure may not be able to meet demand immediately, and the pavement requires seven days of curing before it can open to traffic.View evidenceHide evidence

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Nationwide recycled steel slag pavements can stimulate sustainable urban transportation

Communications Earth & Environment · 2026

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Crossref, PubMed, Europe PMC · 18 candidate papers

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Nationwide recycled steel slag pavements can stimulate sustainable urban transportation

Communications Earth & Environment · 2026 · Crossref

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Candidate

Life cycle assessment to evaluate the environmental performance of new construction material from stainless steel slag

The International Journal of Life Cycle Assessment · 2018 · Crossref

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And 12 more candidates considered.