Low-CO2 emission strategies to achieve net zero target in cement sector

Supriya, .; Chaudhury, Rafiqul Huda; Sharma, U.; Thapliyal, Prakash Chander; Singh, Latika

doi:10.1016/j.jclepro.2023.137466

Cited by 129 publications

(4 citation statements)

References 111 publications

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“…Cement production accounts for approximately 7% of global CO2 emissions, making it one of the most significant contributors to greenhouse gas emissions. In 2021, approximately 2.9 billion tons of CO2 were emitted from global cement manufacturing (Chaudhury et al, 2023). The total volume of cement production worldwide is estimated to be 4.1 billion tons in 2023.…”

Section: Introductionmentioning

confidence: 99%

Effect of Various Mineral Admixtures on the Mechanical and Microstructural Properties of Self-Compacting Geopolymer Concrete

2024

Preprint

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An innovative concrete that incorporates the advantages of self-compacting concrete with geopolymer is called self-compacting geopolymer concrete. The objective of this study was the Manufacturing of M30-grade self-compacting geopolymer concrete by adding industrial materials like fly ash (FA), ultrafine ground granulated blast furnace slag (UFGGBS), and silica fume (SF) as minerals. The disposal of these industrial wastes can be substantially overcome, as they lead to land pollution. The fixed powder content was 500 kg/m3. A mixture of sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) created an alkaline solution that activated the cementitious binders. In this study, slump flow, L-box, V Funnel, T50 V Funnel, and J ring tests were carried out to determine the fresh qualities of the concrete. These tests were conducted under the regulations for self-compacting concrete provided by EFNARC (2005). To improve the flexural strength of the SCGC, 1.5 % glass fibre was added. This study illustrates how an artificial neural network (ANN) model can determine the concrete mix proportion. The characteristics of SCGC, both fresh and hardened properties test were investigated for molarities of 8, 10, and 12. The microstructural outcomes were determined using Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and X-ray diffraction (XRD).

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Section: Introductionmentioning

confidence: 99%

Effect of Various Mineral Admixtures on the Mechanical and Microstructural Properties of Self-Compacting Geopolymer Concrete

2024

Preprint

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“…However, there are significant carbon emissions not related to fossil fuels, such as process related emissions from the production of materials like aluminum 1 and concrete. 2,3 One removal strategy for these hard-toabate emissions is post-combustion CO 2 capture, where the primary production process can be left unchanged.…”

Section: Introductionmentioning

confidence: 99%

A Kinetic Model of CO2 Absorption in Molten CaO-CaF2-CaCl2

IVELAND,

WESTBYE,

MARCHETTI

et al. 2024

Electrochemistry

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Post-combustion CO 2 capture is a promising method for removing CO 2 from processes where emissions cannot be mitigated by renewable energy input and where the chemical reactions required for production emit CO 2 , e.g. calcination of calcium carbonate (CaCO 3 ) for cement production. One promising capture method is carbon capture in molten salts (CCMS). CCMS is a thermal swing gas-liquid process that utilizes CaO carbonation to absorb CO 2 . The molten salt used in this work is 15 wt% CaO in eutectic CaCl 2 -CaF 2 (86.2 : 13.8 wt%). The CaCl 2 -CaF 2 -CaO system has been found to have high cyclic absorption capacity (0.6 g CO 2 /g CaO), though reaction kinetics has yet to be studied. By utilizing a novel experimental setup, data is collected, and a kinetic model is developed, which can be used in a techno-economic evaluation. The model proposes a simplified description of the CaCl 2 -CaF 2 -CaO system, with the assumption that the reaction is a first order elementary reaction where CaO and CO 2 react to form CaCO 3 without any solubility of CO 2 in the molten salt. CO 2 concentration, temperature, wt% CaO and surface area of molten salt are parameters in the proposed kinetic model. The result is a kinetic model that accurately fits the experimental data with an R 2 value above 0.98. It has been found that increasing the CO 2 concentration and decreasing the temperature yield a higher CaO to CaCO 3 equilibrium conversion.

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“…Globally, cement requirement is estimated to rise by 2050, reaching 6 billion tons [6,7]. In addition, the CO 2 emissions of this sector account for 5-7% of global manmade CO 2 contributions [8]. Therefore, cement-free alternatives for concrete are necessary to reduce global CO 2 [9].…”

Section: Introductionmentioning

confidence: 99%

Study of silicon dioxide nanoparticles on the rheological and mechanical behaviors of self-compacting geopolymer concrete

Christy,

Muthukannan

et al. 2024

IRASE

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Geopolymer concrete (GPC) is a rising eco-conscious substitute for traditional cement-based concrete, bringing the construction industry closer to sustainability. Self-compacting geopolymer concrete (SCGC) enhances the concrete flowability and fills the congested reinforced areas without vibrators in concrete structures such as bridges, tunnels and canals. This study aims to analyze the impact of silicon dioxide nanoparticles (NS) on the rheological and mechanical properties of SCGC to optimize the dosage of NS in SCGC. For this purpose, NS (0–6%) blended in partially distributed binders of fly ash and ground granulated blast furnace slag (50:50) with 0.5 alkaline binder ratio, 2% superplasticizers (9 kg m−3) (MasterGlenium SKY 8233) and 12% extra water (54 kg m−3). Sodium silicate solution and sodium hydroxide ratio of 2.5 was used for this study. It is observed that SCGC with 3% NS replacement complied with the guidelines of EFNARC. According to the T50cm slump flow test, V-funnel test, and L-box test results meet the guidelines of up to 4% NS replacement, and 3% NS addition offers excellent mechanical properties in SCGC. This study concluded that the replacement of 3% of NS improved the fresh and hardened properties of SCGC, which can apply to construction.

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Low-CO2 emission strategies to achieve net zero target in cement sector

Cited by 129 publications

References 111 publications

Effect of Various Mineral Admixtures on the Mechanical and Microstructural Properties of Self-Compacting Geopolymer Concrete

Effect of Various Mineral Admixtures on the Mechanical and Microstructural Properties of Self-Compacting Geopolymer Concrete

A Kinetic Model of CO<sub>2</sub> Absorption in Molten CaO-CaF<sub>2</sub>-CaCl<sub>2</sub>

Study of silicon dioxide nanoparticles on the rheological and mechanical behaviors of self-compacting geopolymer concrete

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