Carbon fiber-based electrically conductive concrete for salt-free deicing of pavements

JOURNAL OF CLEANER PRODUCTION

卷:203

Article

Sassani, Alireza¹  Arabzadeh, Ali¹  Ceylan, Halil²  Kim, Sunghwan³  Sadati, S. M. Sajed⁴  Gopalakrishnan, Kasthurirangan⁴  Taylor, Peter C.⁵  Abdualla, Hesham⁶ 

[1] Iowa State Univ, 176 Town Engn Bldg, Ames, IA 50011 USA

[2] Iowa State Univ, Civil Construct & Environm Engn, FAA PEGASAS Partnership Enhance Gen Aviat Safety, Ctr Excellence COE,Program Sustainable Pavement E, 410 Town Engn Bldg, Ames, IA 50011 USA

[3] Iowa State Univ, CCEE, Inst Transportat, 24 Town Engn Bldg, Ames, IA 50011 USA

[4] Iowa State Univ, Town Engn Bldg, Ames, IA 50011 USA

[5] Iowa State Univ, Natl Concrete Pavement Technol Ctr, Inst Transportat, 2711 South Loop Dr,Suite 4700, Ames, IA 50010 USA

[6] Iowa State Univ, 24 Town Engn Bldg, Ames, IA 50011 USA

关键词: Electrically conductive concrete;    Heated pavement systems;    Pavement deicing;    Sustainability;    Deicing salts;    Carbon fiber;    Finite element analysis;   

DOI  :  10.1016/j.jclepro.2018.08.315

来源: Elsevier

【 摘 要 】

Traditional methods of removing snow/ice from pavements involve application of deicing salts and mechanical removal that carry environmental concerns. In this study, the feasibility of applying carbon fiber-based electrically conductive concrete (ECON) in heated pavement systems (HPS) as an alternative to traditional methods was investigated. Optimum carbon fiber dosage to achieve desirable electrical conductivity and avoid excessive fiber use was determined by studying carbon fiber percolation in different cementitious composites. System design was evaluated by finite element (FE) analysis. Heating performance in terms of energy consumption regime was studied by quasi-long-term (460-day) experimental study using a prototype ECON slab. Percolation transition zone of carbon fiber in paste, mortar, and concrete were respectively 0.25-1% (Vol.), 0.6-1% (Vol.), and 0.5-0.75% (Vol.). Optimum fiber dosage in ECON with respect to conductivity was 0.75%, resulting in volume conductivity of 1.86 x 10(-2) (S/cm) at 28 days and 1.22 x 10(-2) (S/cm) at 460 days of age. Electrical-energy-to-heat-energy conversion efficiency decreased from 66% at 28 days to 50% at 460-day age. The results showed that the studied technology could be effectively applied for ice/snow melting on pavement surfaces and provide a feasible alternative to traditional methods if the ECON mixing proportions and system configurations are made with necessary precautions. (C) 2018 Elsevier Ltd. All rights reserved.

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