A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of aged binder on piezoelectric properties of cement-based piezoelectric composites
Age-dependent piezoelectric properties of cement piezoelectric composites containing cement-based binder and 50 vol. % PZT piezoelectric inclusions are conducted. The effect of binder with 10 to 50 % cement replaced by slag and fly ash is investigated. Specimens are polarized by 1.5 kV/mm for 30 min when the curing time reaches 7, 28 and 56 days, respectively. Experimental values are measured daily till 120 days after the polarization. Prior to polarization, dielectric loss needs to be less than 0.73 to guarantee the feasibility of polarization. Piezoelectric properties including d33, g33 and εr are age-dependent unless the age is higher than 60 days after the polarization. The electromechanical coupling coefficient κt is independent of the ages. The curing time shows less efficient to piezoelectric properties while hydration reaction is completed. 20 vol. % cement replaced by slag or fly ash provides optimum d33 and g33. Compared with slag replacement, fly ash replacement can diminish εr, but increase κt. In addition, a modified equation to calculate the dielectric constant of PZT/cement composites is also proposed.
Effect of aged binder on piezoelectric properties of cement-based piezoelectric composites
Age-dependent piezoelectric properties of cement piezoelectric composites containing cement-based binder and 50 vol. % PZT piezoelectric inclusions are conducted. The effect of binder with 10 to 50 % cement replaced by slag and fly ash is investigated. Specimens are polarized by 1.5 kV/mm for 30 min when the curing time reaches 7, 28 and 56 days, respectively. Experimental values are measured daily till 120 days after the polarization. Prior to polarization, dielectric loss needs to be less than 0.73 to guarantee the feasibility of polarization. Piezoelectric properties including d33, g33 and εr are age-dependent unless the age is higher than 60 days after the polarization. The electromechanical coupling coefficient κt is independent of the ages. The curing time shows less efficient to piezoelectric properties while hydration reaction is completed. 20 vol. % cement replaced by slag or fly ash provides optimum d33 and g33. Compared with slag replacement, fly ash replacement can diminish εr, but increase κt. In addition, a modified equation to calculate the dielectric constant of PZT/cement composites is also proposed.
Effect of aged binder on piezoelectric properties of cement-based piezoelectric composites
Pan, Huang-Hsing (author) / Chiang, Chang-Keng (author)
Acta Mechanica ; 225 ; 1287-1299
2014
13 Seiten
Article (Journal)
English
Dielectric and piezoelectric properties of piezoelectric ceramic-sulphoaluminate cement composites
| British Library Online Contents | 2005
Piezoelectric properties of cement based/PVDF/PZT composites
| British Library Online Contents | 2014
Cement-Sand Based Piezoelectric Smart Composites
| Tema Archive | 2013
Cement-Sand Based Piezoelectric Smart Composites
| Trans Tech Publications | 2013
Cement-based piezoelectric ceramic smart composites
| British Library Online Contents | 2005