Influence of Base Thickness on Properties of 1-3-2 Connectivity Cement Based Piezoelectric Composite

Cheng, Xin; Xu, Dong; Liao, Shuang Shuang; Huang, Shi Feng

doi:10.4028/www.scientific.net/amr.306-307.835

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Piezoelectric cement-based materials are commonly obtained by incorporating a piezoelectric material (commonly in the form of ceramic particles such as lead zirconotitanate, which is abbreviated PZT) in the cement-based material [57][58][59][60][61]. In particular, the piezoelectric material can be embedded in an aggregate [62,63].…”

Section: Piezoelectric Cement-based Materialsmentioning

confidence: 99%

Piezoelectricity-based self-sensing of compressive and flexural stress in cement-based materials without admixture requirement and without poling

Shi¹,

Chung²

2018

Smart Mater. Struct.

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The self-sensing of compressive and flexural stress in cement-based materials (without embedded or attached sensors, without admixture requirement and without poling) by capacitance measurement has been demonstrated. The sensing involves two coplanar electrodes in the form of aluminum foil adhered to the cement-based material by using adhesive tape, which also serves as a dielectric film. The normal force associated with compressive or flexural loading is applied to the region between the electrodes. The stress regimes are the low-stress regime (up to 1500 Pa), the medium-stress regime (1500–7400 Pa) and the high-stress regime (7400–65 000 Pa). The lowest compressive/flexural stress demonstrated for effective sensing is 300 Pa. The fractional decrease in capacitance per unit stress is up to 2.2 × 10−6 Pa−1 and tends to decrease as the regime is changed from low to medium and to high-stress. The sensitivity tends to be greater for the compressive stress than flexural stress. However, when the normal stress (relevant to weighing) is considered, the sensitivity is higher for flexural loading than compressive loading. The strain contributes negligibly to the capacitance decrease, though the near-surface deformability of the cement-based material contributes. The change in capacitance upon stress application is attributed to the direct piezoelectric effect. The sensitivity is comparable for cement paste, mortar and concrete. Capacitance-based self-sensing is advantageous over resistance-based self-sensing in terms of the low-stress sensing effectiveness, absence of admixture or aggregate proportion requirements, essential absence of self-sensing effectiveness reduction by the presence of aggregates, wide applicability to existing concrete structures, and ease of applying electrodes.

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Section: Piezoelectric Cement-based Materialsmentioning

confidence: 99%

Piezoelectricity-based self-sensing of compressive and flexural stress in cement-based materials without admixture requirement and without poling

Shi¹,

Chung²

2018

Smart Mater. Struct.

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“…Therefore, a new solution is proposed in this paper. AAFS was used as a matrix material in the preparation of a 1-3-2 piezoelectric composite, and its properties were thoroughly investigated [ 24 , 25 ]. The sodium silicate modulus and SL/AF ratio are the most important factors that determine the properties of AAFS [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Slag/Fly Ash Ratio and Sodium Silicate Modulus on the Properties of 1-3-2 Alkali-Based Piezoelectric Composite

et al. 2022

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In this paper, a comprehensive experimental investigation on the effect of the slag-to-fly ash ratio (hereafter referred to as SL/FA) and sodium silicate modulus on the properties of a 1-3-2 piezoelectric composite was carried out. The influence of the SL/FA ratio on various properties was initially investigated. Compared with other specimens, specimens with SL/FA = 40%:60% had the highest electromechanical coupling coefficient (Kt = 77.67%, Kp = 71%). Therefore, the specimen with SL/FA = 40%:60% was chosen to explore the effect of the sodium silicate modulus. Additionally, the specimen with SL/FA = 40%:60% and a sodium silicate modulus of 1.3 had the best electromechanical conversion efficiency with Kt = 75.68% and Kp = 75.95%. The 1-3-2 alkali-based piezoelectric composite proved to have the characteristics of a low cost, optimal piezoelectric and mechanical properties, higher tunability, and better compatibility with concrete. It is a potential alternative to cement-based piezoelectric composites and may be widely utilized to monitor the health of concrete structures.

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Influence of Base Thickness on Properties of 1-3-2 Connectivity Cement Based Piezoelectric Composite

Cited by 2 publications

References 6 publications

Piezoelectricity-based self-sensing of compressive and flexural stress in cement-based materials without admixture requirement and without poling

Piezoelectricity-based self-sensing of compressive and flexural stress in cement-based materials without admixture requirement and without poling

The Influence of Slag/Fly Ash Ratio and Sodium Silicate Modulus on the Properties of 1-3-2 Alkali-Based Piezoelectric Composite

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