ECOPact Low-Carbon Concrete
Lower-carbon structural ready-mix concrete (C32/40, CEM IIIA — high ground granulated blast-furnace slag) for in-situ frames, slabs and foundations. Over 30% less embodied carbon than a standard CEM I mix, on the manufacturer’s industry base levels, and the concrete slowly reabsorbs CO₂ (carbonation) in use. Holcim UK’s ECOPact range, formerly Aggregate Industries.
Carbon and evidence
Product Evidence
Evidence currently held for the Holcim UK product record.
Recorded Carbon Result
A1–A3 GWP-total per m³ of C32/40 CIIIA concrete, per EPD (~40% below standard CEM I)
A1–A3 covers raw-material supply, transport to manufacture and manufacturing. It is product-stage information, not a whole-life result.
Environmental Product Declaration
EPD recorded- Coverage
- Representative product
- Declared unit
- 1 m³ unreinforced concrete C32/40 CIIIA
- Programme
- Institut Bauen und Umwelt e.V. (IBU)
- Registration
- IBU-CEI-HOL-2205120-UK2025000111-ISUE002-EN
- Standard
- EN 15804+A2 (EN 16757)
- Valid until
- 2030-04-13
- Verification
- Third-party verified
Externally (third-party) verified IBU EPD; UK-produced (Whetstone plant). Low-carbon via high GGBS content (CEM IIIA) — ~40% below a standard CEM I C32/40. B1 = −2.70 kgCO2e/m³ is in-use carbonation (concrete reabsorbing CO₂). EPD is for unreinforced concrete; add reinforcement separately.
Carbon profile
kgCO2e per 1 m³ · each bar starts at zero · local scale
A1-A3 product
184
A4-A5 site*
17.6
B use
-2.7
C end of life
14.6
D reuse / recycling
-4.17
Reported GWP Modules
Displayed as stored; modules are not added together here.
A1–A3
184 kgCO₂e
per 1 m³
A4*
11.8 kgCO₂e
per 1 m³
A5*
5.79 kgCO₂e
per 1 m³
B1
-2.7 kgCO₂e
per 1 m³
C1
9 kgCO₂e
per 1 m³
C2
4.31 kgCO₂e
per 1 m³
C3
1.32 kgCO₂e
per 1 m³
C4
0 kgCO₂e
per 1 m³
D
-4.17 kgCO₂e
per 1 m³
Upfront Carbon (A1–A5)*
202 kgCO₂e per 1 m³
A1–A3 184 + A4 11.8 + A5 5.79 · as declared
Service Life — the B4 Replacement Input
50 years · EPD reference service life
≈2 installations over a 60-year building study period.
Sourced Product Claims
- Over 30% lower CO2 than standard CEM I concrete; the ECOPact range spans 30-100% lower depending on gradeManufacturer declaredSource
1 claim and 1 certification are held in the staging record but not presented as product evidence because an exact public source has not yet been mapped.
Evidence Sources
Comparison Status
This result should be displayed for information only and not ranked against another product.
- • The PCR and version are missing.
- • The GWP indicator is missing.
- • The carbon result is not linked to an evidence source.
- • The EPD is not linked to an evidence source.
Evidence Gaps
- •1 sustainability claim is withheld because exact public evidence is not mapped.
- •1 certification is withheld because exact public evidence is not mapped.
Design & Specification Notes
Qualitative notes for early design discussion. Not product-specific EPD evidence, and not a basis for numerical comparison.
Lower-carbon structural ready-mix concrete (C32/40, CEM IIIA — high ground granulated blast-furnace slag) for in-situ frames, slabs and foundations.
Typical Uses
- •Primary frame
- •Long-span elements
- •Load-bearing supports
Key Performance
High load-bearing capacity for primary frame.
Specification Actions
- •Specify GGBS/PFA cement replacement (target: 50%+ replacement).
- •Request EPD showing embodied carbon per m3.
- •Calculate transport distances for primary materials.
Indicative Health & Indoor Air
Wet concrete is alkaline/irritant — standard PPE when placing; inert once cured.
Specification
- Range
- ECOPact C32/40 CIIIA
- Collection
- ECOPact
- Finish
- Low-carbon ready-mix concrete (C32/40)
- Service life
- 50 years