ESIQ
Low Carbon & New Energies
InsightMay 20268 min readESIQ Research

Cement Decarbonisation & Green Cement Solutions

A research-led view of the technologies, policy signals, cost dynamics, and market shifts shaping low-carbon construction.

Cement plant - decarbonisation intelligence
01Why it matters now

Why cement decarbonisation matters now

Cement is the foundation of the built world - and one of its largest carbon liabilities. Responsible for 7-8% of global greenhouse-gas emissions and 2.5-3.0 gigatonnes of CO₂ per year, it stands as the second-largest industrial emitter on the planet, and one of the hardest sectors to decarbonise.

The urgency has sharpened. Carbon pricing is spreading, the EU's border-carbon mechanism (CBAM) reaches full force in 2026, and developers, governments and investors increasingly mandate low-carbon materials. A credible, commercial path to green cement now exists - and producers who move first are capturing structural advantage.

2.5-3.0 Gt
CO₂ emitted per year by the global cement sector
7-8%
of all global greenhouse-gas emissions
#2
largest industrial CO₂ emitter on the planet
Demand growth drivers
Global infrastructure investment accelerating
Rapid urbanisation across Asia & Africa
Energy transition: roads, housing, grid infrastructure
Cement demand projected to rise +12-15% by 2030
Why action is urgent
Carbon pricing expanding across major markets
CBAM: EU border adjustment reaches full force, 2026
Green procurement mandates from governments & developers
Net-zero commitments across the construction value chain
02The emissions baseline

The anatomy of a tonne of CO₂

Cement's carbon footprint is structurally unusual. Around 60% of emissions come not from burning fuel, but from chemistry itself - the calcination of limestone releases CO₂ no matter how the kiln is heated. This is why fuel-switching alone can never reach zero, and why a multi-lever strategy is essential.

Emissions sources - per tonne of cement
~60%Process emissions (calcination)

Limestone calcination - a chemical reaction that releases CO₂ regardless of fuel type. Cannot be eliminated through fuel-switching alone.

~35%Fuel combustion

Kiln heating with coal, petcoke or waste fuels. Reducible through alternative fuels, biomass and longer-term electrification.

~5%Indirect & other

Transport, raw-material processing and grinding - addressable through electrification and efficiency upgrades.

Conventional cement emits 0.6-0.9 tCO₂ per tonne. Green-cement pathways target under 0.2 - a reduction of more than 75%.

Carbon intensity by cement type - tCO₂ per tonne

Conventional OPC
~0.83Standard
Blended Cement
0.50-0.65Mature
LC3 Cement
0.45-0.55Commercial
Geopolymer
0.10-0.20Emerging
Carbon-Cured
0.15-0.30Pilot
CCUS-Enabled OPC
<0.10Scale-up

CO₂ reduction and intensity (tCO₂/t) vs. conventional Portland cement (OPC ≈ 0.83 tCO₂/t).

03Low-carbon cement pathways

A spectrum, not a single product

Green cement is not one thing - it is a spectrum of technologies and pathways that reduce CO₂ anywhere from 15% to near-zero. They cluster into three strategic approaches, each with distinct economics and readiness profiles.

Clinker substitution
Replace energy-intensive clinker with supplementary cementitious materials (SCMs): slag, fly ash, calcined clay, limestone. Commercially proven and lowest-cost.
Alternative binders
Geopolymers, alkali-activated materials and novel cements that bypass calcination entirely - eliminating process CO₂ at the source.
Carbon capture & offset
Post-combustion CCUS captures residual kiln CO₂. Mineralisation embeds CO₂ permanently into concrete products. Essential for deep decarbonisation.
Spotlight · LC3

LC3 - Limestone Calcined Clay Cement

One of the most commercially viable low-carbon cements available today. It needs minimal kiln modification, uses abundant local raw materials, and delivers proven performance at commercial scale.

40%
CO₂ reduction vs conventional OPC
~Equal
compressive strength & durability
20-30%
lower clinker-to-cement ratio
Abundant
low-grade limestone & clay feedstocks
Commercial examples
JK Lakshmi - commercial LC3 at scaleHolcim ECOPact - deployed across EU & AsiaTITAN Group - 60%+ alternative fuel substitution
04Key decarbonisation levers

Five practical pathways to net zero

No single lever decarbonises cement. The optimal strategy stacks the cheapest, fastest reductions first - clinker substitution, alternative fuels, and efficiency - then layers CCUS for the unavoidable 60% process-emission fraction.

Clinker substitution
Cost: Low-Medium
20-40%
Alternative fuels (AFR)
Cost: Low-Medium
10-25%
Energy efficiency
Cost: Low
5-15%
Green cement (LC3/Geo)
Cost: Low-Medium
40-80%
CCUS
Cost: High
85-90%
Clinker substitution
Replacing clinker with SCMs (slag, fly ash, calcined clay, limestone) is the highest-impact, lowest-cost lever. The LC3 pathway alone achieves ~40% reduction without performance compromise.
Alternative fuels (AFR)
Biomass and RDF/SRF from municipal waste can replace 50-80% of fossil fuels in kilns. TITAN Group exceeds 60% AFR at operational plants - cutting combustion emissions substantially.
Energy efficiency
Waste heat recovery, kiln APC systems, and modern grinding technology offer 5-20% reductions each. Renewable power integration compounds the benefit across the full electricity load.
Carbon capture (CCUS)
Post-combustion amine capture and oxyfuel combustion can achieve 85-90% CO₂ capture from kilns. Costs run $80-150/t CO₂ but are essential for the unavoidable process-emission fraction - the 60% that cannot be fuel-switched away.
05Market & policy signals

The forces reshaping cement markets

Policy, pricing, procurement and investor pressure are converging - creating a structural shift in the economics of cement production that will reward early movers and raise costs for high-emission producers.

2026 - Full force
EU Carbon Border Adjustment (CBAM)
CBAM applies to cement imports into the EU from 2026, raising the cost of high-emission exports and accelerating the business case for decarbonisation in global supply chains.
Growing coverage
Carbon Pricing Expansion
Carbon pricing mechanisms now cover 23% of global emissions. At €80-120/t (EU ETS range), the cost of conventional OPC rises ~€83/t - bringing green cement to cost parity or better.
Public & private
Green Procurement Mandates
Governments in the EU, UK and North America are writing low-carbon construction requirements into public procurement. Developers and contractors are following with net-zero supply chain commitments.
Net zero by 2050
IEA & Mission Possible Roadmaps
IEA and the Global Cement and Concrete Association roadmaps set out a credible path to net-zero cement by 2050 - requiring investment in CCUS, green cement, and deep fuel switching at scale.
Green premium today
5-15%
above conventional cement - far below green steel. Expected to rise as carbon costs escalate.
Carbon cost impact (EU ETS)
€80-120/t
At €100/t, OPC costs rise ~€83/t - bringing green cement to cost parity or cheaper.
CCUS commercial scale
2027-30
First large-scale cement CCUS projects expected on-stream in Europe within this window.
06How ESIQ supports cement transition strategies

Research built for cement transition decisions

ESIQ provides bespoke intelligence, market mapping, and voice-of-customer research for organisations navigating the cement decarbonisation transition - whether as producers, investors, developers, or technology providers.

01

Technology & Market Mapping

Tracking which low-carbon cement technologies are at commercial readiness - and where deployment is moving fastest by geography and producer type.

02

Policy & Regulatory Intelligence

Monitoring CBAM, national carbon pricing, green procurement standards, and environmental regulations affecting cement production and trade.

03

Competitive Landscape Analysis

Profiling the strategic moves of global cement producers, new entrants, and technology developers in the low-carbon space.

04

Voice of Customer Research

Understanding what developers, contractors and buyers actually require in terms of low-carbon materials - and where the green premium ceiling lies.

05

Transition Strategy Support

Supporting investment decisions, technology selection, and go-to-market planning for organisations operating in or entering the cement transition value chain.

Need clarity on a cement transition challenge?

Start a conversation with ESIQ about your research needs - from technology intelligence to market entry and competitive mapping.

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