Potential of CO 2 sequestration through construction and demolition (C&amp;D) waste—An overview

Kaliyavaradhan, Senthil Kumar; Ling, Tung-Chai

doi:10.1016/j.jcou.2017.05.014

Cited by 194 publications

(89 citation statements)

References 34 publications

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“…The increasing capacity can be explained by optimized and more efficient concrete pre-treatment steps, allowing retrieveal of more reactive material. Carbonation efficiency, 110 and 70 kg of CO 2 per ton of MFC with L/S ratio of 10 and 30 wt.% respectively, are in accordance with literature [33]. Nevertheless, when comparing efficiency and feedstock requirements, applications are limited to large cities or areas with a dense population.…”

Section: Discussionsupporting

confidence: 85%

Waste Concrete Valorization; Aggregates and Mineral Carbonation Feedstock Production

Pasquier

Kemache²,

Mocellin

et al. 2018

Geosciences

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Concrete is a major constituent of our world. Its contributes to building society but is also an important contributor to the global CO2 emissions. The combination of waste concrete recycling and greenhouse gas abatement is obviously an interesting approach. Mineral carbonation is the methodology that allows the use of calcium oxide within the concrete and transform it into carbonates with the CO2. Following previous results, carbonation experiments were performed using concrete paste extracted from a waste concrete sample after aggregate separation. The latter was performed after crushing and attrition followed by sieving to obtain three fractions. The coarser one composed of aggregates, the second of sand and the last, a fine powder of waste concrete paste (MCF). The MCF is then used in carbonation experiments in an 18.7 L stirred reactor with a diluted source of CO2 following previously optimized conditions. Different S/L ratios were experimented. The results show that 110 kg of CO2 can be stored per ton of MCF obtained after separation. Using the mass balance obtained from the experiments, an economic evaluation was performed on both aggregate separation and carbonation. While the first step can be profitable, using the MCF as a material for industrial flue gas abatement is less evident, both on the applicability and the feasibility.

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Section: Discussionsupporting

confidence: 85%

Waste Concrete Valorization; Aggregates and Mineral Carbonation Feedstock Production

Pasquier

Kemache²,

Mocellin

et al. 2018

Geosciences

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“…An example of this type of technology is the manufacture of concrete from the construction and demolition waste of buildings, which at the same time can capture CO2, this through the crushing of said waste to use them as aggregates for concrete and cure them with CO2 actively or passively. These concretes are ideal for manufacturing concrete blocks and paving stones [14]. Another way to minimize GHG is to use steel slag as a raw material for the manufacture of building materials.…”

Section: -1-strategies For the Use Of Alternative Concretesmentioning

confidence: 99%

Strategies to Reduce CO2 Emissions in Housing Building by Means of CDW

2019

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One of the biggest problems that human beings face is climate change and construction industry is one of the sectors causing the greatest impact, which has led him to adopt sustainable strategies. However, these have not been effective enough to reduce CO2 emissions, since solutions are required accompanied by other alternatives. Therefore, the objective of this study is to reduce CO2 by implementing CDW strategies under the following method: 1) analysis of CO2 of the major raw materials consumed, 2) use of the materials at the construction site was determined, 3) waste streams generated at the construction site were identified and those that could be reuse were highlighted, 4) CDW recycling strategies to avoid the use of the major raw materials consumption are proposed, and 5) one of the strategies proposed is further analyzed. The results show that natural aggregates generate the greater amount of CO2 due to the consumption of fuel required for their transportation. By replacing 68% of natural aggregates by recycled aggregates, CO2 can be reduced by 53%. Finally, these results can help to promote the opening of new CDW recycling companies in Nayarit and thereby contribute to the sum of sustainability practices in housing building.

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“…Direct aqueous carbonation of mineral rocks and solid waste materials also occur through a natural process called weathering where piles of waste ashes are exposed to atmospheric CO2 (Sipilä et al, 2008b). Generally, industrial by-products, wastes and residues react more promptly than natural minerals Kaliyavaradhan and Ling, 2017). The characteristics and compositions of the residues are majorly affected by the changes in process conditions such as temperature and pressure (Teir et al, 2006).…”

Section: Direct Aqueous Carbonationmentioning

confidence: 99%

“…Mineral sequestration can also be performed ex-situ that does not rely on large underground reservoirs or oceans (Ababou et al, 2017;Aminu et al, 2017;Kaliyavaradhan and Ling, 2017;Shashikant Yadav and Mehra, 2017a). Another advantage of mineral sequestration is that the reaction of CO2 with minerals can occur without any external energy input (Shashikant Yadav and Mehra, 2017b).…”

Section: Introductionmentioning

confidence: 99%

CO2 Sequestration by Mineral Carbonation: A Review

2018

Global NEST Journal

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<p>The mineral sequestration, one of the methods of CO2 sequestration, is considered advantageous, as it not only facilitates permanent and leakage free storage of CO2 but also obviates the need for regular monitoring. Mineral sequestration involves the dissolution of minerals and subsequently carbonation of dissolved minerals. In the direct mineral sequestration all the processes occur within a single reactor, whereas in the cases of indirect mineral sequestration, they take place in separate reactors. The main aim of the present study is to investigate the efficacy of these mineral sequestration methods and examine their suitability for industrial application and ensuring environmental friendliness. For this purpose, literature pertaining to these methods was extensively reviewed, and observations made by several researchers were collected, collated and compared based on the various parameters such as reaction pathways, reaction kinetics and cost of the process. The process cost was found to depend on the type of the process, process parameters, input materials and additives. It was noted that the direct mineral sequestration suffers from the sluggish reaction kinetics, thereby becomes economically unviable. The success of direct mineral sequestration process is yet to be achieved despite research carried out for several years. The problem of sluggish reaction kinetics was overcome by using multi-steps indirect carbonation routes, where separate reactors were used for dissolution and precipitation processes. The indirect sequestration method was noted to be most efficient as it offered several advantages such as improved reaction kinetics and recovery of the market value of by-product due to the better quality control of the product. Hence, based on interpretation of an extensive review of literature it can be concluded that the indirect mineral sequestration may be a viable option to carry out the CO2 sequestration and may be proved as a guiding light to ensure the clean environment for future generation.</p>

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Potential of CO 2 sequestration through construction and demolition (C&D) waste—An overview

Cited by 194 publications

References 34 publications

Waste Concrete Valorization; Aggregates and Mineral Carbonation Feedstock Production

Waste Concrete Valorization; Aggregates and Mineral Carbonation Feedstock Production

Strategies to Reduce CO2 Emissions in Housing Building by Means of CDW

CO2 Sequestration by Mineral Carbonation: A Review

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