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A platform for research: civil engineering, architecture and urbanism
Rapid strength formation of on-site carbon fiber reinforced high-performance concrete cured by ohmic heating
https://orcid.org/0000-0002-2462-8746
Highlights Ohmic heating curing is originally proposed for preparing on-site high-performance concrete. Percolation and experimental analysis is conducted to determine the optimal CFs content. A relatively stable conductive path is constructed by CFs in CF-HPC. A thermal balance equation is derived to better understand the curing process under ohmic heating. CF-HPC-OH shows mechanical properties comparable to those of CF-HPC-HTS.
Abstract In this paper, ohmic heating (OH) curing was proposed as a novel curing method for on-site high-performance concrete (HPC). With this method, constant electric power was applied to the carbon fiber reinforced high-performance concrete (CF-HPC) sample to generate ohmic heating, which aided to the rapid structural strength formation. Carbon fibers (CFs) were utilized to build the conductive network in the fresh CF-HPC sample and enhance the tensile strength and toughness of CF-HPC. A numerical and experimental study was conducted to dissect the bridging behavior of CFs and determine the optimal content of CFs. The CF-HPC-OH sample showed a stable electrical resistivity during the 3 d curing period, and numerical analysis of the thermal balance based on heat transfer theory was carried out to better describe the relationship between electric power and curing temperature. The CF-HPC-OH sample with constant electric power of 20 W showed mechanical properties comparable to the CF-HPC sample with high-temperature steam curing. This work provides insights into an efficient curing method to rapidly form the strength of HPC for achieving the objective of on-site construction through ohmic heating curing.
Rapid strength formation of on-site carbon fiber reinforced high-performance concrete cured by ohmic heating
https://orcid.org/0000-0002-2462-8746
Highlights Ohmic heating curing is originally proposed for preparing on-site high-performance concrete. Percolation and experimental analysis is conducted to determine the optimal CFs content. A relatively stable conductive path is constructed by CFs in CF-HPC. A thermal balance equation is derived to better understand the curing process under ohmic heating. CF-HPC-OH shows mechanical properties comparable to those of CF-HPC-HTS.
Abstract In this paper, ohmic heating (OH) curing was proposed as a novel curing method for on-site high-performance concrete (HPC). With this method, constant electric power was applied to the carbon fiber reinforced high-performance concrete (CF-HPC) sample to generate ohmic heating, which aided to the rapid structural strength formation. Carbon fibers (CFs) were utilized to build the conductive network in the fresh CF-HPC sample and enhance the tensile strength and toughness of CF-HPC. A numerical and experimental study was conducted to dissect the bridging behavior of CFs and determine the optimal content of CFs. The CF-HPC-OH sample showed a stable electrical resistivity during the 3 d curing period, and numerical analysis of the thermal balance based on heat transfer theory was carried out to better describe the relationship between electric power and curing temperature. The CF-HPC-OH sample with constant electric power of 20 W showed mechanical properties comparable to the CF-HPC sample with high-temperature steam curing. This work provides insights into an efficient curing method to rapidly form the strength of HPC for achieving the objective of on-site construction through ohmic heating curing.
Rapid strength formation of on-site carbon fiber reinforced high-performance concrete cured by ohmic heating
https://orcid.org/0000-0002-2462-8746
Highlights Ohmic heating curing is originally proposed for preparing on-site high-performance concrete. Percolation and experimental analysis is conducted to determine the optimal CFs content. A relatively stable conductive path is constructed by CFs in CF-HPC. A thermal balance equation is derived to better understand the curing process under ohmic heating. CF-HPC-OH shows mechanical properties comparable to those of CF-HPC-HTS.
Abstract In this paper, ohmic heating (OH) curing was proposed as a novel curing method for on-site high-performance concrete (HPC). With this method, constant electric power was applied to the carbon fiber reinforced high-performance concrete (CF-HPC) sample to generate ohmic heating, which aided to the rapid structural strength formation. Carbon fibers (CFs) were utilized to build the conductive network in the fresh CF-HPC sample and enhance the tensile strength and toughness of CF-HPC. A numerical and experimental study was conducted to dissect the bridging behavior of CFs and determine the optimal content of CFs. The CF-HPC-OH sample showed a stable electrical resistivity during the 3 d curing period, and numerical analysis of the thermal balance based on heat transfer theory was carried out to better describe the relationship between electric power and curing temperature. The CF-HPC-OH sample with constant electric power of 20 W showed mechanical properties comparable to the CF-HPC sample with high-temperature steam curing. This work provides insights into an efficient curing method to rapidly form the strength of HPC for achieving the objective of on-site construction through ohmic heating curing.
Rapid strength formation of on-site carbon fiber reinforced high-performance concrete cured by ohmic heating
Liu, Yushi (author) / Tian, Weichen (author) / Wang, Mingzhi (author) / Qi, Beimeng (author) / Wang, Wei (author)
2020-02-03
Article (Journal)
Electronic Resource
English
Strength of Hybrid Fiber Reinforced High-Performance Concrete
| British Library Conference Proceedings | 2007
| Springer Verlag | 2017