Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Inclusion of construction and demolition waste as a coarse aggregate and a cement addition in structural concrete design
Publicado en: Archives of Civil and Mechanical Engineering, Volume 19, Issue 4, August 2019, Pages 1338-1352. https://doi.org/10.1016/j.acme.2019.08.004 ; Dissociating economic growth from the use of natural resources is imperative to the sustainable development of the construction industry. The use of secondary raw materials by processing and managing construction and demolition waste (C&DW) is one of the major challenges to transition to a circular economy. This study assessed the effect of simultaneously using cement additioned with the ceramic (fired clay-based) fraction of C&DW and recycled mixed aggregate (RMA) in concrete manufacture by analysing fresh concrete workability, density and air content and hardened concrete compressive, flexural and splitting tensile strength. Regression and variance analyses were run on the findings to determine the effect of RMA and cement type and their interaction on the dependent variables. The percentage of RMA was observed to be the most significant determinant for concrete density and air content. Early age compressive strength was impacted by cement type, although strength in the later age materials was comparable to that of concrete manufactured with conventional cement. The combined effect of cement type and percentage of RMA appeared to have no significant effect on tensile or flexural strength. On the contrary, the differences observed in these properties were due to the separate effect of each factor. The findings showed that the use of cement containing C&DW additions and up to 50% RMA did not substantially compromise concrete performance. ; This study was funded by the Spanish Ministry of Science and Innovation under project BIA2016-76643- C3-1-R, as well as by the Government of Extremadura and ERDF under grant GR 18122 awarded to the MATERIA research group. One of the authors benefitted from Ministry of Education, Culture and Sport pre-doctoral grant FPU16/02693. ; peerReviewed
Inclusion of construction and demolition waste as a coarse aggregate and a cement addition in structural concrete design
Publicado en: Archives of Civil and Mechanical Engineering, Volume 19, Issue 4, August 2019, Pages 1338-1352. https://doi.org/10.1016/j.acme.2019.08.004 ; Dissociating economic growth from the use of natural resources is imperative to the sustainable development of the construction industry. The use of secondary raw materials by processing and managing construction and demolition waste (C&DW) is one of the major challenges to transition to a circular economy. This study assessed the effect of simultaneously using cement additioned with the ceramic (fired clay-based) fraction of C&DW and recycled mixed aggregate (RMA) in concrete manufacture by analysing fresh concrete workability, density and air content and hardened concrete compressive, flexural and splitting tensile strength. Regression and variance analyses were run on the findings to determine the effect of RMA and cement type and their interaction on the dependent variables. The percentage of RMA was observed to be the most significant determinant for concrete density and air content. Early age compressive strength was impacted by cement type, although strength in the later age materials was comparable to that of concrete manufactured with conventional cement. The combined effect of cement type and percentage of RMA appeared to have no significant effect on tensile or flexural strength. On the contrary, the differences observed in these properties were due to the separate effect of each factor. The findings showed that the use of cement containing C&DW additions and up to 50% RMA did not substantially compromise concrete performance. ; This study was funded by the Spanish Ministry of Science and Innovation under project BIA2016-76643- C3-1-R, as well as by the Government of Extremadura and ERDF under grant GR 18122 awarded to the MATERIA research group. One of the authors benefitted from Ministry of Education, Culture and Sport pre-doctoral grant FPU16/02693. ; peerReviewed
Inclusion of construction and demolition waste as a coarse aggregate and a cement addition in structural concrete design
Cantero Chaparro, Blas (Autor:in) / Sáez del Bosque, Isabel Fuencisla (Autor:in) / Matías Sánchez, Agustín (Autor:in) / Sánchez de Rojas Gómez, María Isabel (Autor:in) / Medina Martínez, César (Autor:in) / CSIC. Instituto de Ciencias de la Construcción Eduardo Torroja (IETCC) / Universidad de Extremadura. Departamento de Construcción / Universidad de Extremadura. Instituto Universitario de Investigación para el Desarrollo Territorial Sostenible (INTERRA)
01.01.2019
Archives of Civil and Mechanical Engineering
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Construction and demolition waste , Residuos de contrucción y demolición , Recycled mixed aggregate , Áridos reciclados mixtos , Supplementary cementitious materials , Materiales de cemento suplementarios , Recycled concrete , Hormigón reciclado , 3305.06 Ingeniería Civil , 3312.08 Propiedades de Los Materiales , 3312.12 Ensayo de Materiales
Economy in Concrete Using Demolition Waste as Coarse Aggregate
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Recycled construction and demolition concrete waste as aggregate for structural concrete
| DOAJ | 2013
| BASE | 2022