{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T07:24:45Z","timestamp":1769153085252,"version":"3.49.0"},"reference-count":59,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2021,3,13]],"date-time":"2021-03-13T00:00:00Z","timestamp":1615593600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Crystals"],"abstract":"<jats:p>Recycled aggregate concrete is a solution used to minimize the environmental impact of the concrete industry. Notwithstanding research worldwide validating structural applications of recycled aggregate concrete, specific design guidelines are lacking and are needed to address reservations of construction agents. Design guidelines should be based on reliability concepts, including the stochastic modeling of material properties and the calibration of design clauses through reliability methods. This paper concerns the concrete cover design of recycled aggregate concrete elements exposed to chloride ingress. Only coarse recycled aggregates produced from concrete waste are studied. The paper describes the chloride ingress model of fib Bulletin 34, presents experiments on the chloride ion migration of several analogue natural and recycled aggregate concrete mixes, tackles the stochastic modeling of the chloride migration coefficient, and calibrates concrete cover design for recycled aggregate concrete using reliability methods. The concrete cover design followed the deemed-to-satisfy provisions of Eurocode 2 and EN 206. The case studies used in the reliability analyses covered several design situations. A 5 mm increase of concrete cover is recommended as a simple option that ensures that the probability of depassivation due to chloride ingress on recycled aggregate concrete elements is equivalent to that for analogue natural aggregate concrete elements.<\/jats:p>","DOI":"10.3390\/cryst11030284","type":"journal-article","created":{"date-parts":[[2021,3,14]],"date-time":"2021-03-14T22:13:10Z","timestamp":1615759990000},"page":"284","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Eurocode Design of Recycled Aggregate Concrete for Chloride Environments: Stochastic Modeling of Chloride Migration and Reliability-Based Calibration of Cover"],"prefix":"10.3390","volume":"11","author":[{"given":"Ant\u00f3nio","family":"Albuquerque","sequence":"first","affiliation":[{"name":"CERIS-ICIST, IST, Universidade de Lisboa, 1049-001 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9348-1226","authenticated-orcid":false,"given":"Jo\u00e3o","family":"Pacheco","sequence":"additional","affiliation":[{"name":"CERIS-ICIST, IST, Universidade de Lisboa, 1049-001 Lisbon, Portugal"}]},{"given":"Jorge","family":"Brito","sequence":"additional","affiliation":[{"name":"CERIS-ICIST, IST, Universidade de Lisboa, 1049-001 Lisbon, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2021,3,13]]},"reference":[{"key":"ref_1","first-page":"1","article-title":"Current status on the use of recycled aggregates in concrete: Where do we go from here?","volume":"10","author":"Silva","year":"2016","journal-title":"RILEM Tech. Lett."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Xiao, J. (2018). Recycled Aggregate Concrete Structures, Tracts in Civil Engineering; Springer.","DOI":"10.1007\/978-3-662-53987-3"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1054","DOI":"10.1016\/j.conbuildmat.2012.11.106","article-title":"Durability of recycled aggregate concrete","volume":"40","author":"Thomas","year":"2013","journal-title":"Constr. Build. Mater."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"201","DOI":"10.1016\/j.conbuildmat.2014.04.117","article-title":"Properties and composition of recycled aggregates from construction and demolition waste suitable for concrete production","volume":"65","author":"Silva","year":"2014","journal-title":"Constr. Build. Mater."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"815","DOI":"10.14359\/51687800","article-title":"Destructive horizontal load tests of full-scale recycled aggregate concrete structures","volume":"112","author":"Pacheco","year":"2015","journal-title":"ACI Struct. J."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"868","DOI":"10.1016\/j.jclepro.2018.07.210","article-title":"A recycled aggregate concrete high-rise building: Structural performance and embodied carbon footprint","volume":"199","author":"Xiao","year":"2018","journal-title":"J. Clean. Prod."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"705","DOI":"10.1016\/j.conbuildmat.2018.04.163","article-title":"Heterogeneity of recycled concrete aggregates, an intrinsic variability","volume":"175","author":"Khoury","year":"2018","journal-title":"Constr. Build. Mater."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"70","DOI":"10.1680\/jcoma.17.00081","article-title":"Mechanical behaviour of coarse lightweight, recycled and natural aggregates for concrete","volume":"173","author":"Pepe","year":"2018","journal-title":"Proc. Inst. Civil Eng. Constr. Mater."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"110","DOI":"10.1016\/j.conbuildmat.2018.12.200","article-title":"Experimental investigation on the variability of the main mechanical properties of recycled aggregate concrete","volume":"201","author":"Pacheco","year":"2019","journal-title":"Constr. Build. Mater."},{"key":"ref_10","first-page":"377","article-title":"Calibration of Design Code for Buildings (ACI 318): Part 1\u2014Statistical Models for Resistance","volume":"100","author":"Nowak","year":"2003","journal-title":"ACI Struct. J."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"242","DOI":"10.1080\/13287982.2016.1246793","article-title":"Calibration of Australian Standard AS3600 Concrete structures: Part I statistical analysis of material properties and model error","volume":"17","author":"Foster","year":"2016","journal-title":"Aust. J. Struct. Eng."},{"key":"ref_12","unstructured":"Gulvanessian, H., and Holick\u00fd, M. (2002, January 21\u201322). Reliability based calibration of Eurocodes considering a steel member. Proceedings of the JCSS Workshop on Reliability Based Code Calibration, Zurich, Switzerland."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"82","DOI":"10.1016\/j.resconrec.2006.05.012","article-title":"Removal of cement mortar remains from recycled aggregate using pre-soaking approaches","volume":"50","author":"Tam","year":"2007","journal-title":"Resour. Conserv. Recy."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.jobe.2016.02.003","article-title":"Structural, material, mechanical and durability properties and behaviour of recycled aggregates concrete","volume":"6","author":"Ferreira","year":"2016","journal-title":"J. Build. Eng."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Tattersall, G.H. (1991). Workability and Quality Control of Concrete, E&FN Spon.","DOI":"10.1201\/9781482267006"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"102","DOI":"10.3151\/jact.17.102","article-title":"Scatter of constitutive models of the mechanical properties of concrete: Comparison of major international codes","volume":"17","author":"Pacheco","year":"2019","journal-title":"J. Adv. Concr. Technol."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"223","DOI":"10.1016\/S0958-9465(02)00010-0","article-title":"Assessment of the surface permeation properties of recycled aggregate concrete","volume":"25","author":"Zaharieva","year":"2003","journal-title":"Cem. Concr. Compos."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"263","DOI":"10.1016\/j.conbuildmat.2014.08.034","article-title":"Use of coarse recycled aggregates from precast concrete rejects: Mechanical and durability performance","volume":"71","author":"Soares","year":"2014","journal-title":"Constr. Build. Mater."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"86","DOI":"10.1016\/j.cemconcomp.2018.01.013","article-title":"Prediction model of carbonation depth for recycled aggregate concrete","volume":"88","author":"Zhang","year":"2018","journal-title":"Cem. Concr. Compos."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"22","DOI":"10.1016\/j.cemconcomp.2015.04.017","article-title":"Carbonation behaviour of recycled aggregate concrete","volume":"62","author":"Silva","year":"2015","journal-title":"Cem. Concr. Compos."},{"key":"ref_21","unstructured":"Limbachiya, M.C., and Roberts, J.J. (2004). Use of recycled aggregate in concrete application: Case studies. Proceedings of the International Conference on Sustainable Waste Management and Recycling: Challenges and Opportunities, Thomas Telford."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"449","DOI":"10.1061\/(ASCE)0899-1561(2008)20:6(449)","article-title":"Chloride penetration and binding in recycled concrete","volume":"20","author":"Zega","year":"2008","journal-title":"J. Mater. Civ. Eng."},{"key":"ref_23","unstructured":"(2006). fib Bulletin 34: Model Code for Service Life Design, fib."},{"key":"ref_24","unstructured":"NT-Build-492 (1999). Concrete, Mortar and Cement-Based Repair Materials: Chloride Migration Coefficient from Non-Steady-State Migration Experiments, Nordtest."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"427","DOI":"10.1590\/1516-1439.000214","article-title":"Prediction of chloride ion penetration of recycled aggregate concrete","volume":"18","author":"Silva","year":"2015","journal-title":"Mater. Res."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Pacheco, J., de Brito, J., Chastre, C., and Evangelista, L. (2019). Probabilistic conversion of the compressive strength of cubes to cylinders of natural and recycled aggregate concrete specimens. Materials, 12.","DOI":"10.3390\/ma12020280"},{"key":"ref_27","unstructured":"EN-206 (2013). Concrete: Specification, Performance, Production and Conformity. Incorporating Corrigendum May 2014, CEN."},{"key":"ref_28","first-page":"25","article-title":"Eurocode1, basis of design, background information","volume":"74","author":"Vrouwenvelder","year":"1996","journal-title":"IABSE Rep."},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Gulvanessian, H., Calgaro, J.A., and Holicky, M. (2002). Designers\u2019 guide to EN1990 Eurocode: Basis of structural design. Designers\u2019 Guide to the Eurocodes, Thomas Telford.","DOI":"10.1680\/cien.144.6.8.40609"},{"key":"ref_30","unstructured":"ISO-2394:1998 (1998). General Principles on Reliability for Structures, ISO."},{"key":"ref_31","unstructured":"(2015). fib Bulletin 76: Benchmarking of Deemed-to-Satisfy Provisions in Standards, fib."},{"key":"ref_32","unstructured":"EN-1992-1-1 (2008). Eurocode 2\u2014Design of Concrete Structures: Part 1-1: General Rules and Rules for Buildings, Comit\u00e9 Europ\u00e9en de Normalisation (CEN)."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"718","DOI":"10.1002\/suco.201600085","article-title":"Performance-based durability design, carbonation, part 3: PSF approach and a proposal for the revision of deemed-to-satisfy rules","volume":"17","author":"Gehlen","year":"2016","journal-title":"Struct. Concr."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"309","DOI":"10.1002\/suco.201600066","article-title":"Performance based durability design, carbonation part 1\u2014Benchmarking of European present design rules","volume":"17","author":"Gehlen","year":"2016","journal-title":"Struct. Concr."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"523","DOI":"10.1002\/suco.201600067","article-title":"Performance-based durability design, carbonation part 2\u2014Classification of concrete","volume":"17","author":"Gehlen","year":"2016","journal-title":"Struct. Concr."},{"key":"ref_36","unstructured":"JCSS (2021, March 11). Probabilistic Model Code. Part 3: Material Properties. Available online: https:\/\/www.jcss-lc.org\/publications\/jcsspmc\/part_iii.pdf."},{"key":"ref_37","unstructured":"EN-933-4 (2008). Tests for Geometrical Properties of Aggregates. Determination of Particle Shape. Shape Index, Comit\u00e9 Europ\u00e9en de Normalisation (CEN)."},{"key":"ref_38","unstructured":"EN-1097-3 (1998). Tests for Mechanical and Physical Properties of Aggregates. Determination of Loose Bulk Density and Voids, Comit\u00e9 Europ\u00e9en de Normalisation (CEN)."},{"key":"ref_39","unstructured":"EN-1097-6 (2013). Tests for Mechanical and Physical Properties of Aggregates. Determination of Particle Density and Water Absorption, Comit\u00e9 Europ\u00e9en de Normalisation (CEN)."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"1045","DOI":"10.1590\/S1516-14392013005000074","article-title":"A new method to determine the density and water absorption of fine recycled aggregates","volume":"16","author":"Rodrigues","year":"2013","journal-title":"Mater. Res."},{"key":"ref_41","unstructured":"EN-12350-2 (2009). Testing Fresh Concrete. Slump-Test, Comit\u00e9 Europ\u00e9en de Normalisation (CEN)."},{"key":"ref_42","unstructured":"EN-12390-3 (2009). Testing Hardened Concrete. Part3: Compressive Strength of Test Specimens, Comit\u00e9 Europ\u00e9en de Normalisation (CEN)."},{"key":"ref_43","unstructured":"EN-197 (2011). Cement. Composition, Specifications and Conformity Criteria for Common Cements, Comit\u00e9 Europ\u00e9en de Normalisation (CEN)."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"872","DOI":"10.1016\/j.conbuildmat.2008.04.012","article-title":"Study on the influence of attached mortar content on the properties of recycled concrete aggregate","volume":"23","year":"2009","journal-title":"Constr. Build. Mater."},{"key":"ref_45","unstructured":"EN-933-1 (2012). Tests for Geometrical Properties of Aggregates. Determination of Particle Size Distribution. Sieving Method, Comit\u00e9 Europ\u00e9en de Normalisation (CEN)."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"3965","DOI":"10.1617\/s11527-014-0456-7","article-title":"Performance of concrete made with aggregates recycled from precasting industry waste: Influence of the crushing process","volume":"48","author":"Pedro","year":"2015","journal-title":"Mater. Struct."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"117322","DOI":"10.1016\/j.conbuildmat.2019.117322","article-title":"Fresh properties of recycled aggregate concrete","volume":"233","author":"Lavado","year":"2020","journal-title":"Constr. Build. Mater."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"101173","DOI":"10.1016\/j.jobe.2020.101173","article-title":"A comparative study of the mechanical and life cycle assessment of high-content fly ash and recycled aggregates concrete","volume":"29","author":"Kurda","year":"2020","journal-title":"J. Build. Eng."},{"key":"ref_49","unstructured":"Hirschi, T., and Wombacher, F. (2008). Influence of different superplasticizers on UHPC. Proceedings of the Second International Symposium on Ultra High Performance Concrete, Kassel University Pres."},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"485","DOI":"10.1016\/j.jclepro.2017.07.236","article-title":"Effect of incorporation of high volume of recycled concrete aggregates and fly ash on the strength and global warming potential of concrete","volume":"166","author":"Kurad","year":"2017","journal-title":"J. Clean. Prod."},{"key":"ref_51","doi-asserted-by":"crossref","unstructured":"Thoft-Christensen, P., and Baker, M.J. (1982). Structural Reliability Theory and Its Applications, Springer.","DOI":"10.1007\/978-3-642-68697-9"},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"283","DOI":"10.1016\/j.conbuildmat.2019.03.089","article-title":"Statistical analysis of Portuguese ready-mixed concrete production","volume":"209","author":"Pacheco","year":"2019","journal-title":"Constr. Build. Mater."},{"key":"ref_53","first-page":"1535","article-title":"Effect of recycled aggregate quality on variation and estimation of concrete strength","volume":"33","author":"Henry","year":"2011","journal-title":"Proc. Jpn. Concr. Inst."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"61","DOI":"10.1007\/s40069-015-0123-6","article-title":"On Probability Distribution of Chloride Diffusion Coefficient for Recycled Aggregate Concrete","volume":"10","author":"Ying","year":"2016","journal-title":"Int. J. Concr. Struct. Mater."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"735","DOI":"10.1016\/j.cemconres.2007.02.002","article-title":"Influence of amount of recycled coarse aggregates and production process on properties of recycled aggregate concrete","volume":"37","author":"Etxeberria","year":"2007","journal-title":"Cem. Concr. Res."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"288","DOI":"10.1016\/j.conbuildmat.2015.05.045","article-title":"Effects of internal curing on the strength, drying shrinkage and freeze\u2013thaw resistance of concrete containing recycled concrete aggregates","volume":"91","author":"Yildirim","year":"2015","journal-title":"Constr. Build. Mater."},{"key":"ref_57","unstructured":"LNEC-E465 (2005). Methodology for Estimating the Concrete Performance Properties Allowing to Comply with the Design Working Life of the Reinforced or Prestressed Concrete Structures under the Environmental Exposures XC and XS (in Portuguese), National Laboratory of Civil Engineering (Laborat\u00f3rio Nacional de Engenharia Civil\u2014LNEC)."},{"key":"ref_58","doi-asserted-by":"crossref","unstructured":"Lemaire, M. (2009). Structural Reliability, Jone Wiley & Sons.","DOI":"10.1002\/9780470611708"},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"105","DOI":"10.1016\/j.strusafe.2008.06.020","article-title":"Aleatory or epistemic? Does it matter?","volume":"31","author":"Ditlevsen","year":"2009","journal-title":"Struct. 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