Activation and utilization of tailings as CO2 mineralization feedstock and supplementary cementitious materials: a critical review

Li, L.; Yu, H.; Zhou, S.; Dao, V.; Chen, M.; Ji, L.; Benhelal, E.

doi:10.1016/j.mtsust.2023.100530

Cited by 7 publications

(2 citation statements)

References 192 publications

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“…There are also opportunities for mixing or codepositing mine tailings with cementitious materials (waste concrete), which are highly reactive with CO 2 . This approach would also utilize a second industrial waste stream. − Li et al reviewed processes for the mechanical, chemical, and thermal activation of various mine tailings and potential use of supplementary cementitious materials. Furthermore, Bullock et al reviewed a broad range of mine tailings with recommendations for carbonation processes.…”

Section: Accelerating On-site Ewm Using Mine Wastesmentioning

confidence: 99%

The Mining Industry’s Role in Enhanced Weathering and Mineralization for CO₂ Removal

Power,

Paulo,

Rausis

2023

Environ. Sci. Technol.

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Enhanced weathering and mineralization (EWM) aim to remove carbon dioxide (CO 2 ) from the atmosphere by accelerating the reaction of this greenhouse gas with alkaline minerals. This suite of geochemical negative emissions technologies has the potential to achieve CO 2 removal rates of >1 gigatonne per year, yet will require gigatonnes of suitable rock. As a supplier of rock powder, the mining industry will be at the epicenter of the global implementation of EWM. Certain alkaline mine wastes sequester CO 2 under conventional mining conditions, which should be quantified across the industry. Furthermore, mines are ideal locations for testing acceleration strategies since tailings impoundments are contained and highly monitored. While some environmentally benign mine wastes may be repurposed for off-site use� reducing costs and risks associated with their storage�numerous new mines will be needed to supply rock powders to reach the gigatonne scale. Large-scale EWM pilots with mining companies are required to progress technology readiness, including carbon verification approaches. With its knowledge of geological formations and ore processing, the mining industry can play an essential role in extracting the most reactive rocks with the greatest CO 2 removal capacities, creating supply chains, and participating in lifecycle assessments. The motivations for mining companies to develop EWM include reputational benefits and carbon offsets needed to achieve carbon neutrality.

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Section: Accelerating On-site Ewm Using Mine Wastesmentioning

confidence: 99%

The Mining Industry’s Role in Enhanced Weathering and Mineralization for CO₂ Removal

Power,

Paulo,

Rausis

2023

Environ. Sci. Technol.

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“…Thermal stress due to temperature fluctuations must always be computed at the design stage of any concrete component (EC-2, 2010 ; ACI 2014 ). Moreover, the presence of alternative materials within the concrete to improve its sustainability (J. Xu et al 2022a , b ; Çeçen et al 2023 ; Li et al 2023 ), such as recycled concrete, slag, and plastic aggregates, will always affect its response to temperature fluctuations. Recycled concrete aggregate exposed to cyclic thermal fluctuations causes micro-cracking within the interfacial transition zones that reduces strength (Revilla-Cuesta et al 2023a ).…”

Section: Introductionmentioning

confidence: 99%

Effects of temperature and moisture fluctuations for suitable use of raw-crushed wind-turbine blade in concrete

Revilla-Cuesta,

Hurtado-Alonso,

Manso-Morato

et al. 2024

Environ Sci Pollut Res

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Raw-crushed wind-turbine blade (RCWTB), a waste from the recycling of wind-turbine blades, is used as a raw material in concrete in this research. It contains not only fiberglass-composite fibers that bridge the cementitious matrix but also polyurethane and balsa-wood particles. Therefore, concrete containing RCWTB can be notably affected by moisture and temperature fluctuations and by exposure to high temperatures. In this research, the performance of five concrete mixes with 0.0%, 1.5%, 3.0%, 4.5%, and 6.0% RCWTB, respectively, is studied under moist/dry, alternating-sign-temperature-shock, and high-temperature-shock tests. Two damage mechanisms of RCWTB within concrete were found through these tests: on the one hand, micro-cracking of the cementitious matrix, which was verified by microscopic analyses and was dependent on concrete porosity; on the other, damage and degradation of the RCWTB components, as the polyurethane melted, and the balsa-wood particles burned. Both phenomena led to larger remaining-strain levels and reduced concrete compressive strength by up to 25% under temperature and humidity variations, although the bridging effect of the fiberglass-composite fibers was effective when adding RCWTB amounts higher than 3.0%. The compressive-strength loss after the high-temperature-shock test increased with the RCWTB content, reaching maximum values of 8% after an exposure time of 7 days. Statistical analyses revealed that effect of the RCA amount in the concrete was conditioned by the exposure times in all the tests. The accurate definition of those times is therefore key to set an RCWTB content in concrete that ensures its suitable behavior under the environmental conditions analyzed.

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Recycling of mine tailings as supplementary cementitious material: Impact of mine tailings’ mineralogy on hydration behaviour and phase assemblage of Ordinary Portland cement blends

Mawire,

McDonald,

Austin

et al. 2024

Cleaner Materials

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Activation and utilization of tailings as CO2 mineralization feedstock and supplementary cementitious materials: a critical review

Cited by 7 publications

References 192 publications

The Mining Industry’s Role in Enhanced Weathering and Mineralization for CO₂ Removal

The Mining Industry’s Role in Enhanced Weathering and Mineralization for CO₂ Removal

Effects of temperature and moisture fluctuations for suitable use of raw-crushed wind-turbine blade in concrete

Recycling of mine tailings as supplementary cementitious material: Impact of mine tailings’ mineralogy on hydration behaviour and phase assemblage of Ordinary Portland cement blends

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Activation and utilization of tailings as CO2 mineralization feedstock and supplementary cementitious materials: a critical review

Cited by 7 publications

References 192 publications

The Mining Industry’s Role in Enhanced Weathering and Mineralization for CO2 Removal

The Mining Industry’s Role in Enhanced Weathering and Mineralization for CO2 Removal

Effects of temperature and moisture fluctuations for suitable use of raw-crushed wind-turbine blade in concrete

Recycling of mine tailings as supplementary cementitious material: Impact of mine tailings’ mineralogy on hydration behaviour and phase assemblage of Ordinary Portland cement blends

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The Mining Industry’s Role in Enhanced Weathering and Mineralization for CO₂ Removal

The Mining Industry’s Role in Enhanced Weathering and Mineralization for CO₂ Removal