Properties of Non-Structural Concrete Made with Mixed Recycled Aggregates and Low Cement Content
| Autor: | Martín López, Jesús Ayuso, María José Sierra, José Ramón Jiménez, Antonio López-Uceda, Francisco Agrela |
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| Rok vydání: | 2016 |
| Předmět: |
Ceramics
Materials science Sorptivity low cement content 0211 other engineering and technologies Young's modulus 02 engineering and technology ceramics mechanical properties lcsh:Technology Article physical properties law.invention symbols.namesake law 021105 building & construction Ultimate tensile strength mixed recycled aggregate non-structural concrete General Materials Science Ceramic Composite material lcsh:Microscopy Porosity lcsh:QC120-168.85 Cement Low cement content Physical properties lcsh:QH201-278.5 lcsh:T Superplasticizer 021001 nanoscience & nanotechnology Mechanica properties Mixed recycled aggregate Portland cement lcsh:TA1-2040 Non-structural concrete visual_art symbols visual_art.visual_art_medium lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:TK1-9971 |
| Zdroj: | Materials 9(2), 74 (2016) Helvia. Repositorio Institucional de la Universidad de Córdoba instname Materials; Volume 9; Issue 2; Pages: 74 Materials, Vol 9, Iss 2, p 74 (2016) Materials |
| Popis: | In spite of not being legally accepted in most countries, mixed recycled aggregates (MRA) could be a suitable raw material for concrete manufacturing. The aims of this research were as follows: (i) to analyze the effect of the replacement ratio of natural coarse aggregates with MRA, the amount of ceramic particles in MRA, and the amount of cement, on the mechanical and physical properties of a non-structural concrete made with a low cement content; and (ii) to verify if it is possible to achieve a low-strength concrete that replaces a greater amount of natural aggregate with MRA and that has a low cement content. Two series of concrete mixes were manufactured using 180 and 200 kg/m3 of CEM II/A-V 42.5 R type Portland cement. Each series included seven concrete mixes: one with natural aggregates; two MRA with different ceramic particle contents; and one for each coarse aggregate replacement ratio (20%, 40%, and 100%). To study their properties, compressive and splitting tensile strength, modulus of elasticity, density, porosity, water penetration, and sorptivity, tests were performed. The results confirmed that the main factors affecting the properties analyzed in this research are the amount of cement and the replacement ratio; the two MRAs used in this work presented a similar influence on the properties. A non-structural, low-strength concrete (15 MPa) with an MRA replacement ratio of up to 100% for 200 kg/m3 of cement was obtained. This type of concrete could be applied in the construction of ditches, sidewalks, and other similar civil works. |
| Databáze: | OpenAIRE |
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