Valorization of industrial by-product: Phosphogypsum recycling as green binding material

Valdir M. Pereira; Rodrigo H. Geraldo; Túllio A.M. Cruz; Gladis Camarini

Cleaner Engineering and Technology (Dec 2021)

Valorization of industrial by-product: Phosphogypsum recycling as green binding material

Valdir M. Pereira,
Rodrigo H. Geraldo,
Túllio A.M. Cruz,
Gladis Camarini

Affiliations

Valdir M. Pereira: School of Civil Engineering, Architecture and Urban Design, University of Campinas, Rua Saturnino de Brito, 224, Campinas, São Paulo, 13083-889, Brazil; São Judas Tadeu University (USJT), Rua Taquari, 546 - Mooca, São Paulo, São Paulo, 03166-000, Brazil
Rodrigo H. Geraldo: School of Civil Engineering, Architecture and Urban Design, University of Campinas, Rua Saturnino de Brito, 224, Campinas, São Paulo, 13083-889, Brazil; FACENS University, Rodovia Senador José Ermírio de Moraes, 1425, Castelinho Km 1,5, Alto da Boa Vista, Sorocaba, São Paulo, CEP 18087-125, Brazil
Túllio A.M. Cruz: School of Civil Engineering, Architecture and Urban Design, University of Campinas, Rua Saturnino de Brito, 224, Campinas, São Paulo, 13083-889, Brazil; Federal Institute for Education, Science and Technology of Minas South IFSULDEMINAS, Estrada de Muzambinho, Bairro - Morro Preto, Muzambinho, Minas Gerais, CEP 37890-000, Brazil
Gladis Camarini: School of Civil Engineering, Architecture and Urban Design, University of Campinas, Rua Saturnino de Brito, 224, Campinas, São Paulo, 13083-889, Brazil; University Center of Minas South – UNIS-MG, Avenida Alzira Barra Gazzola, 650, Bairro Aeroporto, Varginha, Minas Gerais, CEP 37031-099, Brazil; Corresponding author. School of Civil Engineering, Architecture and Urban Design, University of Campinas, Rua Saturnino de Brito, 224, Campinas, São Paulo, 13083-889, Brazil.

Journal volume & issue: Vol. 5
p. 100310

Abstract

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Phosphogypsum (PG) from fertilizer industry represents an environmental problem, and it is usually discharged near the fertilizer plants. This waste is commonly stored in open piles, causing environmental impacts. When PG is calcined, it acquires binding properties. This paper had the objective to evaluate the use of recycled phosphogypsum (RPG), produced by PG calcination at low temperatures, for application in civil construction. The study also evaluated the feasibility of incorporating industrial waste (red ceramic - CW, porcelain - PW, and rice husk ash - RHA) to improve sustainability and search for eco-friendly materials. Results showed that RPG had properties equivalent to commercial gypsum plaster: similar flow (workability), faster setting times (initial and final), and mechanical strength to make building components. The RPG composites with wastes also achieved mechanical properties acceptable for different uses. The results indicated that the use of RPG as a binder and RPG associated with waste is an option to wastes valorization. The process generated materials with acceptable technical characteristics for applications in building activities.

Published in Cleaner Engineering and Technology

ISSN: 2666-7908 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Mechanical engineering and machinery: Renewable energy sources; Technology: Engineering (General). Civil engineering (General): Environmental engineering
Website: https://www.journals.elsevier.com/cleaner-engineering-and-technology/

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