Policy making in the cement industry for CO2 mitigation on the pathway of sustainable development- A system dynamics approach

Jokar, Zahra; Mokhtar, Alireza

doi:10.1016/j.jclepro.2018.07.286

Cited by 76 publications

(28 citation statements)

References 27 publications

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“…These results imply that the carbon emissions have a non-negligible effect on the benefit allocations in the supply chain. Jokar and Mokhtar presented the idea that the growth trend of the manufacturer profit depends on the benefit of implementing energy conservation [44]. Thus it is advisable for construction companies with large emissions to implement carbon emission reduction, which to some extent improves the economic performance of the companies in their future developments.…”

Section: Resultsmentioning

confidence: 99%

Benefit Allocation in the Construction Supply Chain Considering Carbon Emissions

Du¹,

Huang²,

Xu³

et al. 2019

Pol. J. Environ. Stud.

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The construction industry has played an important role in reducing carbon emissions. Various policies have been implemented to stimulate construction enterprises to reduce carbon emissions, but the effects of emission reduction are not obvious, for they do not directly benefit the enterprises. This paper employs a modified Shapley value method to study benefit allocation in a construction supply chain considering carbon emissions. Four correction factors are proposed for modifying the initial allocation, namely the contribution rate of inputs, the risk-sharing coefficient, the degree of cooperation and the contribution rate of carbon emissions. We analyze carbon emissions based on an illustrative example of a concrete supply chain consisting of a cement manufacturer, a concrete manufacturer and a construction enterprise, and present our findings. First, the enterprises intend to cooperate to achieve the greatest benefit, and second, the benefit allocation is greatly affected by carbon emissions. Participants that produce more carbon emissions have higher carbon tax costs, which reduce profits. Further suggestions are also presented, which may help enterprises reduce carbon emissions. And policy makers should arrive at a suitable level of carbon tax to promote the smooth progress of projects and to improve the emission reduction effect.

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Section: Resultsmentioning

confidence: 99%

Benefit Allocation in the Construction Supply Chain Considering Carbon Emissions

Du¹,

Huang²,

Xu³

et al. 2019

Pol. J. Environ. Stud.

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“…Currently, the carbon emissions in the cement industry stem mainly from the burning of the clinker (calcination of calcareous raw material and combustion of fossil fuels), which is responsible for 90-95% of all CO 2 emissions during cement production [19]. Thus, carbon emission reduction in the cement industry mainly relies on the improvement of clinkers or clinker substitution technologies [20,21]. However, efforts by traditional industries, especially in developing countries, are approaching the limits of what they can do.…”

Section: Introductionmentioning

confidence: 99%

Carbon Emissions of China’s Cement Packaging: Life Cycle Assessment

2019

Sustainability

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China is the largest producer of cement in the world. With this tremendous production of cement, the extensively used cement packaging embodies significant carbon dioxide emissions. However, this has scarcely been investigated. This paper presents the first investigation into three types of cement packaging in China using the life cycle assessment methodology. The carbon dioxide emissions in each production phase of cement packaging were calculated and compared to the emissions in the western, middle, and eastern regions in China. The results show that in the production phase, the consumption of electricity accounted for the highest proportion of total carbon dioxide emissions (23.39–35.14%), followed by the consumption of polypropylene-based material (23.39%). From a packaging perspective, laminated plastic woven bags emitted the most carbon dioxide (0.637 kg/bag), followed by paper–plastic composite bags (0.536 kg/bag) and paper bags (0.022 kg/bag). In regional terms, the western region emitted the most carbon dioxide (3.06 million tons) compared with the eastern (2.01 million tons) and middle (1.81 million tons) regions due to the low bulk rate. Our findings indicate that using paper–plastic composite bags instead of laminated plastic woven bags and using recycled materials instead of new materials in certain production phases can considerably reduce the environmental impacts of cement packaging. The government should encourage the use of non-coal energy power generation for the production phase. Further improvements could focus on the use of bulk cement instead of packaged cement.

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“…A utilização do cimento como principal material na construção civil está associada à alta poluição ambiental e ao alto consumo de energia. Considerando as limitações dos recursos de combustíveis fósseis e as rigorosas regulamentações ambientais, alcançar uma produção sustentável de cimento é uma iniciativa fundamental a ser seguida [1]. Algumas das alternativas para diminuição do uso de recursos finitos na produção do clínquer são: melhorias na eficiência energética, recuperação de calor residual, redução da relação clínquer/cimento, uso de matérias primas alternativas, substituição de combustíveis fósseis por fontes alternativas de energia [2].…”

Section: Introductionunclassified

“…Algumas das alternativas para diminuição do uso de recursos finitos na produção do clínquer são: melhorias na eficiência energética, recuperação de calor residual, redução da relação clínquer/cimento, uso de matérias primas alternativas, substituição de combustíveis fósseis por fontes alternativas de energia [2]. Segundo Jokar e Mokhtar [1], a redução da produção de clínquer através da adição de materiais substitutos ao cimento nos compósitos cimentícios é a medida que tem maior impacto nas emissões de 2 , podendo reduzir até 15 milhões de toneladas até 2034.…”

Section: Introductionunclassified

Compósitos cimentícios de ultra alto desempenho com a incorporação de diversos teores de pó de vidro

Soares¹,

Júnior²,

Freitas³

et al. 2019

Simpósio Paranaense De Patologia Das Construções

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Os compósitos cimentícios, especialmente os de ultra alto desempenho, são materiais de grande resistência mecânica que têm em sua composição materiais cimentícios suplementares com a finalidade de diminuir o impacto ambiental provocado pela produção do cimento Portland. O pó de vidro pode ser considerado um material cimentício suplementar devido à sua composição rica em sílica amorfa e, pode ser amplamente utilizado como substituição parcial do cimento Portland no concreto. Assim, o objetivo deste trabalho é avaliar a influência da substituição do cimento Portland por diferentes teores de pó de vidro no comportamento físico e mecânico de um compósito cimentício elaborado para ser utilizado no reparo de estruturas de concreto armado, proporcionando uma opção de destinação adequada para o resíduo de vidro. Para tanto, foram produzidos compósitos cimentícios com consumo de cimento de 1000 kg/m³ com a substituição de 10%, 20%, 30% e 50% em volume do cimento por pó de vidro finamente moído (<75μm). Foram avaliados a massa específica e teor de ar incorporado no estado fresco, resistência à compressão simples, resistência à tração por compressão diametral, módulo de elasticidade dinâmico e absorção de água. As propriedades mecânicas foram determinadas e comparadas com a composição de referência, sem utilização de vidro moído. Os resultados demonstram que o uso do pó de vidro em substituição ao cimento Portland não altera significativamente as propriedades analisadas na idade de 28 dias. Palavras-chave: Compósito cimentício, ultra alto desempenho, pó de vidro Abstract: Cementitious composites, especially those of ultra-high performance, are high mechanical strength materials composed of supplementary cementitious materials in order to reduce the environmental impact caused by the production of Portland cement. Glass powder may be considered a supplementary cementitious material due to its composition rich in amorphous silica, and this material can be used as a partial substitution of Portland cement in concrete. Therefore, this work aims to assess the influence of partial substitution of Portland cement by different contents of glass powder on a cementitious composite designed to be used in reinforced concrete structures repair, providing a suitable destination for glass waste. In this work cementitious composites produced with cement content of 1000 kg/m³, with substitutions of 10%, 20%, 30% and 50 % by volume of finely ground glass (<75μm). Was evaluated the specific gravity and air content in fresh state, axial compression strength tensile splitting strength dynamic elasticity modulus, and water absorption of the mechanical properties were evaluated and compared with reference mix without using ground glass. The results indicate the use of glass powder as substitution of Portland cement does not significantly affect the properties analyzed at 28 days.

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Policy making in the cement industry for CO2 mitigation on the pathway of sustainable development- A system dynamics approach

Cited by 76 publications

References 27 publications

Benefit Allocation in the Construction Supply Chain Considering Carbon Emissions

Benefit Allocation in the Construction Supply Chain Considering Carbon Emissions

Carbon Emissions of China’s Cement Packaging: Life Cycle Assessment

Compósitos cimentícios de ultra alto desempenho com a incorporação de diversos teores de pó de vidro

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