Viscosity prediction of cement-filler suspensions using interference model: A route for binder efficiency enhancement

Autor(es)

Damineli, Bruno L. ^[1] ; John, Vanderley M. ^[1] ; Lagerblad, Bjorn ^[2] ; Pileggi, Rafael G. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Politecn, Dept Construct Engn, BR-05508900 Sao Paulo - Brazil

^[2] Royal Inst Technol, Dept Construct Engn, SE-10044 Stockholm - Sweden

• Tipo de documento: Artigo Científico
• Fonte: CEMENT AND CONCRETE RESEARCH; v. 84, p. 8-19, JUN 2016.
• Citações Web of Science: 7

Resumo

Producing cementitious materials with low CO2 emissions is a key challenge for sustainability, considering the increasing demand for cement and the inefficacy of current industrial solutions. Improving the efficiency of binder use is mandatory, so that binder replacement by inert fillers with lower environmental loads is an alternative, which demands careful control of the rheological behaviour to decrease the water demand of pastes. Dispersion and packing models are well known, but other less explored parameters of raw materials (surface area, density, roughness) and paste (water content, distance between particles) determine the interaction among particles, affecting the paste's rheological behaviour. The aim of this paper is to assess the influence of inert fillers on the rheological behaviour of cementitious pastes. A range of 12 inert fillers with varied aspects was evaluated. The results indicated a good agreement between the Casson viscosity and the interference parameter calculated using the interference model. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 13/03688-3 - Influência das características físico-químicas de fillers calcários na eficiência de dispersão de suspensões cimentícias
• Beneficiário: Bruno Luís Daminelli
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado