Performance evaluation of structural concrete using controlled quality coarse and fine recycled concrete aggregate |
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| Affiliation: | 1. University of Extremadura, UEX-CSIC Partnering Unit, School of Civil Engineering, Avda. de la Universidad, s/n, 10071 Cáceres, Spain;2. Eduardo Torroja Institute for Construction Science – CSIC, C/Serrano Galvache 4, 28033 Madrid, Spain;3. University of Cantabria, School of Civil Engineering, Avda. de Los Castros s/n, 39005 Santander, Spain;1. Department of Civil Engineering, Dr B R Ambedkar National Institute of Technology Jalandhar, 144 011, India;2. Department of Civil Engineering, Indian Institute of Technology Roorkee, 247 667, India;1. ICIST, DECivil, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal;2. ICIST, Instituto Superior de Engenharia de Lisboa, R. Conselheiro Emídio Navarro, 1, 1950-062 Lisbon, Portugal;3. Área de Ingeniería de la Construcción, EPS de BELMEZ, Universidad de Córdoba, Córdoba, Spain |
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| Abstract: | This paper presents the fresh, mechanical, and durability performance, of a structural concrete mix classified as C-1, by the Canadian Standards Association (CSA) made with controlled quality Recycled Concrete Aggregate (RCA). Five mixes with water-to-cementing material (w/cm) ratio of 0.40 were produced with various RCA contents and tested against two 0% RCA control mixes made with General Use (GU) cement, and General Use Limestone cement (GUL). The RCA contents in the mixes were 10%, 20%, and 30% by coarse aggregate volume replacement, as well as 10% and 20% fine and coarse (granular) aggregate volume replacement. All evaluated mixes met the specifications from the CSA for fresh, mechanical, and durability properties. The coarse RCA mixes performed better than the granular RCA mixes in terms of flexural and splitting tensile strengths, linear drying shrinkage, water sorptivity, and rapid chloride-ion permeability, where the test results were significantly affected by the ultra fines present in the granular RCA. |
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| Keywords: | Sustainability Recycled concrete aggregates Structural concrete Fresh properties Mechanical properties Durability |
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