Carbon dioxide reduction potential in the global cement industry by 2050

Miller, Sabbie A.; John, Vanderley M.; Pacca, Sérgio Almeida; Horvath, Arpad

doi:10.1016/j.cemconres.2017.08.026

Cited by 441 publications

(163 citation statements)

References 30 publications

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“…Consequently, the mitigation potential can expand up to 54 times compared to the CO 2 reduction achievable with direct sequestration alone. However, when the incorporation rate of GGBS is constrained below the current level in the nominal case, OPC is reduced primarily by expanding the use of limestone, which is a trend consistent with observations in previous literature [2,55]. In the nominal cases shown in figure 3, about 11%-19% of limestone by mass of OPC is included in mixtures when CO 2 is added during curing or mixingwhich is comparable or higher than the typical incorporation rate of up to 15% and made possible by CO 2 -induced compressive strength enhancement [28,56].…”

Section: Resultssupporting

confidence: 89%

Mitigating CO₂ emissions of concrete manufacturing through CO₂-enabled binder reduction

Lim

Ellis

Skerlos

2019

Environ. Res. Lett.

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Past studies on CO 2 utilization in the concrete industry have primarily focused on maximizing sequestered CO 2 , while focusing less on CO 2 avoidance possible by reducing binder use through the addition of CO 2 to concrete formulations. In this paper, we study the net CO 2 reduction and cost benefits achievable by reducing binder loading while adding CO 2 via three approaches: carbonation during curing, carbonation during mixing, or carbonation with recycled concrete aggregate. These techniques are evaluated for a cohort of concrete formulations representing the diverse mixture designs found in the US ready-mixed and precast industries. Each formulation is optimized for reduced binder loading where the use of CO 2 directly in the formulation recovers the lost compressive strength from reduced binder. We show that over an order of magnitude more CO 2 can be avoided when binder reduction is jointly implemented with CO 2 utilization compared to utilizing CO 2 alone. As a result, nearly 40% of the annual CO 2 emissions from the US concrete industry could, in principle, be eliminated without relying on novel supplemental materials, alternative binder, or carbon capture and sequestration. The recently amended 45Q tax credit will not incentivize this strategy, as it only considers carbon sequestration. However, we find that the saved material cost from reduced binder use on its own may provide a significant economic incentive to promote the joint strategy in practice. We conclude that the real value of CO 2 utilization in concrete hinges on exploiting CO 2 -induced property changes to yield additional emission reduction, not by maximizing absorbed CO 2 .

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Section: Resultssupporting

confidence: 89%

Mitigating CO₂ emissions of concrete manufacturing through CO₂-enabled binder reduction

Lim

Ellis

Skerlos

2019

Environ. Res. Lett.

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“…The role of cement production in CO 2 exhaustion has long been recognized and efforts were made to reduce the carbon footprint of this quickly expanding branch of industry (VDZ 2015). Since 1950 cement production increased from approximately 500 to almost 5000 Mt per year in 2017, China alone contributes 2250 Mt/year and the trend is rising (Miller et al 2018). Since the most significant contribution originates from the burning of the raw materials, a reduction of the clinker share in cement and concretes is currently a widely spread technique to reduce the environmental impact of concrete.…”

Section: Introductionmentioning

confidence: 99%

The effects of calcium–silicate–hydrate (C–S–H) seeds on reference microorganisms

et al. 2020

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Building materials are constantly improved with various additives and admixtures in order to achieve goals ranging from obtaining increased durability or antimicrobial activity up to reducing the carbon footprint left by the cement production. Since nanomaterials were proposed for cement products, many studies explored the possibilities for their incorporation. One of the novel trends in studying these materials is evaluating their impact on living organisms, with the focus not only on toxicology but also on the application potential. Therefore, in this study, we investigated the effects of three types of calciumsilicate-hydrate (C-S-H) seeds on reference microorganisms in the scope of their basic physiology and primary metabolism. Shape, size and elemental composition of C-S-H seeds were also evaluated. The tests on the reference microorganisms have shown that the reaction to these nanomaterials can be specific and depends on the strain as well as the type of used nanomaterial. Furthermore, the presence of C-S-H seeds in the growth environment led to metabolic stimulation that resulted in faster growth, higher biochemical activity, and increased biofilm formation. Based on our findings, we conclude that even though C-S-H seeds have antimicrobial potential, they can be potentially used to promote the growth of selected microbial strains. This phenomenon could be further investigated towards the formation of beneficial biofilms on building materials.

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“…At the same time there are problems of waste disposal and reduction of consumption of natural raw materials. Therefore, the crucial topic of the functioning of civilization in the XXI century is the concept of sustainable development [1,2]. The priorities identified at the World Summit on Sustainable Development are the integration of these three components: economic growth, social development and environmental protection.…”

Section: Introductionmentioning

confidence: 99%

Sustainable low-carbon binders and concretes

et al. 2020

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Sustainable development depends on a consistency of interests, social, ecological and economic, and that the interests are evaluated in a balanced manner. In order to reduce CO2 emissions, the conception of decreasing clinker factor and increasing the role of supplementary cementitious materials (SCMs) in the cementitious materials has high economical and environmental efficiency. The performance of clinkerefficient blended cements with supplementary cementitious materials were examined. The influence of superfine zeolite with increased surface energy on the physical and chemical properties of low-carbon blended cements is shown. Increasing the dispersion of cementitious materials contributes to the growth of their strength activity index due to compaction of cement matrix and pozzolanic reactions in unclincker part. In consequence of the early structure formation and the directed formation of the microstructure of the cement matrix is solving the problem of obtaining clinker-efficient concretes. Shown that low-carbon blended cements with high volume of SCMs are suitable, in principle, for producing structural concretes.

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Carbon dioxide reduction potential in the global cement industry by 2050

Cited by 441 publications

References 30 publications

Mitigating CO₂ emissions of concrete manufacturing through CO₂-enabled binder reduction

Mitigating CO₂ emissions of concrete manufacturing through CO₂-enabled binder reduction

The effects of calcium–silicate–hydrate (C–S–H) seeds on reference microorganisms

Sustainable low-carbon binders and concretes

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Carbon dioxide reduction potential in the global cement industry by 2050

Cited by 441 publications

References 30 publications

Mitigating CO2 emissions of concrete manufacturing through CO2-enabled binder reduction

Mitigating CO2 emissions of concrete manufacturing through CO2-enabled binder reduction

The effects of calcium–silicate–hydrate (C–S–H) seeds on reference microorganisms

Sustainable low-carbon binders and concretes

Contact Info

Product

Resources

About

Mitigating CO₂ emissions of concrete manufacturing through CO₂-enabled binder reduction

Mitigating CO₂ emissions of concrete manufacturing through CO₂-enabled binder reduction