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Life cycle greenhouse gas emissions of blended cement concrete including carbonation and durability

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Life cycle greenhouse gas emissions of blended cement concrete including carbonation and durability

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dc.contributor.author García Segura, Tatiana es_ES
dc.contributor.author Yepes Piqueras, Víctor es_ES
dc.contributor.author Alcalá González, Julián
dc.date.accessioned 2015-04-21T11:33:45Z
dc.date.available 2015-04-21T11:33:45Z
dc.date.issued 2014-01
dc.identifier.issn 0948-3349
dc.identifier.uri http://hdl.handle.net/10251/49057
dc.description The final publication is available at Springer via http://dx.doi.org/10.1007/s11367-013-0614-0 es_ES
dc.description.abstract Purpose Blended cements use waste products to replace Portland cement, the main contributor to CO2 emissions in concrete manufacture. Using blended cements reduces the embodied greenhouse gas emissions; however, little attention has been paid to the reduction in CO2 capture (carbonation) and durability. The aim of this study is to determine if the reduction in production emissions of blended cements compensates for the reduced durability and CO2 capture. Methods This study evaluates CO2 emissions and CO2 capture for a reinforced concrete column during its service life and after demolition and reuse as gravel filling material. Concrete depletion, due to carbonation and the unavoidable steel embedded corrosion, is studied, as this process consequently ends the concrete service life. Carbonation deepens progressively during service life and captures CO2 even after demolition due to the greater exposed surface area. In this study, results are presented as a function of cement replaced by fly ash (FA) and blast furnace slag (BFS). Results and discussion Concrete made with Portland cement, FA (35%FA), and BFS blended cements (80%BFS) captures 47, 41, and 20 % of CO2 emissions, respectively. The service life of blended cements with high amounts of cement replacement, like CEM III/A (50 % BFS), CEM III/B (80 % BFS), and CEMII/B-V (35%FA), was about 10%shorter, given the higher carbonation rate coefficient. Compared to Portland cement and despite the reduced CO2 capture and service life, CEM III/B emitted 20 % less CO2 per year. Conclusions To obtain reliable results in a life cycle assessment, it is crucial to consider carbonation during use and after demolition. Replacing Portland cement with FA, instead of BFS, leads to a lower material emission factor, since FA needs less processing after being collected, and transport distances are usually shorter. However, greater reductions were achieved using BFS, since a larger amount of cement can be replaced. Blended cements emit less CO2 per year during the life cycle of a structure, although a high cement replacement reduces the service life notably. If the demolished concrete is crushed and recycled as gravel filling material, carbonation can cut CO2 emissions by half. A case study is presented in this paper demonstrating how the results may be utilized. es_ES
dc.description.sponsorship This research was financially supported by the Spanish Ministry of Science and Innovation (research project BIA2011-23602). The authors thank the anonymous reviewers for their constructive comments and useful suggestions. The authors are also grateful for the thorough revision of the manuscript by Dr. Debra Westall. en_EN
dc.language Inglés es_ES
dc.publisher Springer Verlag (Germany) es_ES
dc.relation Spanish Ministry of Science and Innovation BIA2011-23602 es_ES
dc.relation.ispartof International Journal of Life Cycle Assessment es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Blended cement es_ES
dc.subject Carbonation es_ES
dc.subject CO2 emission es_ES
dc.subject Durability es_ES
dc.subject Life cycle es_ES
dc.subject Recycled concrete es_ES
dc.subject.classification INGENIERIA DE LA CONSTRUCCION es_ES
dc.subject.classification EXPRESION GRAFICA EN LA INGENIERIA es_ES
dc.title Life cycle greenhouse gas emissions of blended cement concrete including carbonation and durability es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1007/s11367-013-0614-0
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto de Ciencia y Tecnología del Hormigón - Institut de Ciència i Tecnologia del Formigó es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería de la Construcción y de Proyectos de Ingeniería Civil - Departament d'Enginyeria de la Construcció i de Projectes d'Enginyeria Civil es_ES
dc.description.bibliographicCitation García Segura, T.; Yepes Piqueras, V.; Alcalá González, J. (2014). Life cycle greenhouse gas emissions of blended cement concrete including carbonation and durability. International Journal of Life Cycle Assessment. 19(1):3-12. doi:10.1007/s11367-013-0614-0 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi.org/10.1007/s11367-013-0614-0 es_ES
dc.description.upvformatpinicio 3 es_ES
dc.description.upvformatpfin 12 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 19 es_ES
dc.description.issue 1 es_ES
dc.relation.senia 255124
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