Efficiency of Portland-pozzolana cements: Water demand, chemical reactivity and environmental impact

Autor(es)

Abrao, Pedro Cesar R. A. ^{[1, 2]} ; Cardoso, Fabio A. ^{[1, 2]} ; John, Vanderley M. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Construct Engn, Escola Politecn, BR-05508070 Sao Paulo - Brazil

^[2] Natl Inst Adv Ecoefficient Cement Based Technol, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CONSTRUCTION AND BUILDING MATERIALS; v. 247, JUN 30 2020.
• Citações Web of Science: 0

Resumo

One main strategy to reduce CO2 emissions of cement industry is clinker replacement by SCMs. However, the addition of SCMs affects chemical reactivity and water demand of blended compositions, influencing mechanical and environmental performances of cementitious products. This work evaluates the efficiency of an OPC and six Portland-pozzolana cements. The combined water fraction (chemically combined/mixing water), cwf, is proposed as a binder efficiency index which presented a strong correlation with mechanical strength of mortars. Additionally, the study indicates that the environmental impact of mortars (carbon intensity) is not only related to CO2 footprint of cement, but also with cwf index. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 14/50948-3 - INCT 2014: tecnologias ecoeficientes avançadas em produtos cimentícios
• Beneficiário: Vanderley Moacyr John
• Modalidade de apoio: Auxílio à Pesquisa - Temático