Concrete Industry’s Transition from CEMI to CEMII – A Case Study on CO2 Footprint Reduction for a Self-Compacting Concrete Mix

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Abstract:

The greening of cement industry has become a necessity and obligation in many countries and the Global Green Cement market is projected to grow at a Compound Annual Growth Rate of 9.9% in the 2024-2032 period. The race for more sustainable concretes includes a number of key strategies, such as the substitution of cement/clinker with other cementitious materials. In the current research a CEMI (complying with EN197-1:2011) based industrial mix of self-compacting concrete (SCC) is modified with an experimental mix based on CEMII/B-M(P-W-L)42.5N conforming to EN 197-1:2011. The experimental mix presents a dual reduction in CO2 footprint, since not only it is formulated with CEMII, instead of CEMI, but it also contains 320 kg of CEMII/m3 instead of 420 kg of CEMII/m3, by substituting the remaining mass of binder with emery powder. nanoparticles of silicon dioxide (nanosilica) and 12 mm polypropylene fibres were also added. The 7-day compressive strength reached 45 MPa and the 28-day strength reached 51 MPa, marginally lower than that of the industrial mix (60.3 MPa). The performance of nanosilica is discussed. Selected fresh properties in terms of density, slump-flow, air entrainment and strength testing, coupled with surface morphology observations with the use of stereo microscopy shed light into the potentials of such sustainable SCC mixes.

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Materials Science Forum (Volume 1180)

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101-107

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March 2026

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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