Mechanical Performance of Eco-Friendly Concretes with Volcanic Powder and Recycled Concrete Aggregates

Viviana Letelier, José Marcos Ortega, Ester Tarela, Pedro Muñoz, Bastián I. Henríquez-Jara and Giacomo Moriconi
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Viviana Letelier: Departamento de Obras Civiles, Universidad de la Frontera, Av. Fco. Salazar, Temuco 01145, Chile
José Marcos Ortega: Departamento de Ingeniería Civil, Universidad de Alicante, Ap. Correos 99, 03080Alacant/Alicante, Spain
Ester Tarela: Departamento de Obras Civiles, Universidad de la Frontera, Av. Fco. Salazar, Temuco 01145, Chile
Pedro Muñoz: Facultad de Ingeniería, Universidad Autónoma de Chile, 5 Poniente, 1670, Talca 3460000, Chile
Bastián I. Henríquez-Jara: Departamento de Obras Civiles, Universidad de la Frontera, Av. Fco. Salazar, Temuco 01145, Chile
Giacomo Moriconi: Department of Science and Engineering of Matter, Environment and Urban Planning, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy

Sustainability, 2018, vol. 10, issue 9, 1-17

Abstract: At present, reducing the environmental impact of the construction industry is a major subject of study. In terms of the use of recycled concrete aggregates (RCA), most recently conducted studies have shown that the use of a limited percentage of those aggregates does not significantly affect the properties of concretes. This work analysed the mechanical properties of medium-strength concretes with a high contribution to sustainability, where cement and natural coarse aggregates (NCA) were partially replaced by volcanic powder (VP) and RCA, respectively. Three mixing ratios of VP replacement were tested in concretes without RCA and concretes with 30% RCA replacing NCA. Results show that when VP is used without RCA, up to 10% of the cement can be replaced by VP without a significant loss in the mechanical properties. When a combination of 5% VP and 30% RCA is used, the weakness of the recycled concrete is strengthened, obtaining stronger concretes than a control concrete with no recycled materials. Finally, the greenhouse gas assessment showed that the simultaneous incorporation of VP and RCA reduces CO 2 emissions produced in the manufacture of concrete by up to 13.6%.

Keywords: volcanic powder; recycled aggregates; eco-friendly concrete; sustainability; mechanical performance; Young’s modulus (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:10:y:2018:i:9:p:3036-:d:165982

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