Paebbl has launched Rebond 300, a near‑white, carbon negative cement alternative with a footprint of -149kg CO2 per tonne that can replace up to 30% of conventional cement in standard mixes. The SCM-based binder delivers up to 40% reduction in embodied carbon at typical replacement ratios, a 10x improvement over Paebbl’s first‑generation material, while remaining compatible with existing ready‑mix and precast workflows. The Rebond Series is formulated to work across a family of silicate minerals and uses lower clinker process temperatures, reducing heat demand and permanently storing CO2.

Marlborough Highways has resurfaced three live streets for Barnet Council in six days using Holcim SuperLow asphalt and ACLA, a carbon-negative aggregate alternative from Low Carbon Materials, as part of the borough’s BarNET ZERO programme. ACLA was incorporated in the binder course to cut embodied carbon while maintaining carriageway performance, supported by electric rollers, electric disc cutters and electric vans on a 100% renewable tariff, with HVO-powered plant used where electrification was not viable. The scheme cut the estimated carbon footprint from 62.34t CO₂e to as low as 4.49t CO₂e, with most savings coming from material selection rather than plant changes.

Decarbonising the cement sector hinges on cutting process emissions from limestone calcination and fuel combustion in high-temperature kilns, which together make cement one of construction’s largest embodied carbon sources. The piece centres on how robust carbon accounting frameworks, including project-level whole-life carbon assessments and product-level Environmental Product Declarations (EPDs), can expose the relative impacts of clinker content, alternative fuels and SCMs such as fly ash or GGBS. For designers and contractors, consistent accounting is critical to comparing low-clinker cements, specifying lower-carbon mixes and evidencing compliance with client net zero targets.