This study focuses on damage evaluation of the recycled aggregate concrete (RAC) subjected to compressive loading using the electromechanical impedance (EMI) method. To this end, five groups of RAC specimens were prepared with different replacement ratios of recycled coarse aggregate (RCA) for compressive tests under both monotonic and cyclic loading, as well as the EMI tests adopting the embedded PZT smart aggregate (SA) transducer. The influences of RCA content and loading regime on damage process of the RAC were examined in detail based on the test results. In particular, the EMI analysis of SA transducer was theoretically carried out to further explore the general characteristics of admittance curves. Finally, two types of damage indicators were defined based on damage mechanics and the EMI method, respectively. By statistical analysis, correlations between damage indicators were analyzed for different loading regimes and RCA replacement ratios. The results show that damage progress of the RAC under different loading regimes and RCA replacement ratios is generally similar. Besides, correlation coefficient of the conductance curve exhibits the highest correlation with the mechanical damage indicator, making it satisfactory for assessing mechanical damage of the RAC under compressive loading.
LiangCFPanBHMaZM, et al. Utilization of CO2 curing to enhance the properties of recycled aggregate and prepared concrete: a review. Cem Concr Compos2020; 105: 14.
2.
XiongBBDemartinoCXuJJ, et al. High-strain rate compressive behavior of concrete made with substituted coarse aggregates: recycled crushed concrete and clay bricks. Constr Build Mater2021; 301: 19.
3.
WangBYanLBFuQN, et al. A comprehensive review on recycled aggregate and recycled aggregate concrete. Resour Conserv Recycl2021; 171: 29.
4.
OmarySGhorbelEWardehG.Relationships between recycled concrete aggregates characteristics and recycled aggregates concretes properties. Constr Build Mater2016; 108: 163–174.
5.
OngpengJMCOretaAWCHiroseS.Contact and noncontact ultrasonic nondestructive test in reinforced concrete beam. Adv Civ Eng2018; 2018: 10.
6.
MpalaskasAMatikasTAggelisD. Acoustic monitoring for the evaluation of concrete structures and materials. In: Acoustic emission and related non-destructive evaluation techniques in the fracture mechanics of concrete. Elsevier, 2021, pp.257–280.
7.
CaoSLiJWangJ, et al. Study on nondestructive test method for inner defects of mass concrete. IOP Conf Ser Earth Environ Sci2021; 668(1): 012058.
8.
WittmannFHZhangPLehmannE, et al. Visualisation of frost damage in concrete by means of neutron radiography. In: Workshop on Research on Concrete and Applications. Aedificatio Publ Ltd, 2011, p.155.
9.
ThomoglouAKFantidisJGVoutetakiME, et al. Mechanical characterization of nano-reinforced mortar: X-ray micro-CT for 3D imaging of microstructure. Eng Proc2023; 41(1): 4.
10.
VieraMAAde AguiarPROliveiraP, et al. Low-cost piezoelectric transducer for ceramic grinding monitoring. IEEE Sens J2019; 19(17): 7605–7612.
11.
WuAPHeSHRenYL, et al. Design of a new stress wave-based pulse position modulation (PPM) communication system with piezoceramic transducers. Sensors2019; 19(3): 18.
12.
CovaciCGonteanA.Piezoelectric energy harvesting solutions: a review. Sensors2020; 20(12): 37.
13.
TangZSLimYYSmithST, et al. Modelling of the electromechanical impedance technique for prediction of elastic modulus of structural adhesives. Struct Health Monit2021; 20(5): 2245–2260.
14.
ZhangCPandaGPYanQX, et al. Monitoring early-age hydration and setting of Portland cement paste by piezoelectric transducers via electromechanical impedance method. Constr Build Mater2020; 258: 15.
15.
MoharanaSBhallaS.Development and evaluation of an external reusable piezo-based concrete hydration-monitoring sensor. J Intell Mater Syst Struct2019; 30(18–19): 2770–2788.
16.
NegiPChakrabortyTKaurN, et al. Investigations on effectiveness of embedded PZT patches at varying orientations for monitoring concrete hydration using EMI technique. Constr Build Mater2018; 169: 489–498.
17.
ShiYKLuoMZLiWJ, et al. Grout compactness monitoring of concrete-filled fiber-reinforced polymer tube using electromechanical impedance. Smart Mater Struct2018; 27(5): 11.
18.
ZuoCYFengXZhangY, et al. Crack detection in pipelines using multiple electromechanical impedance sensors. Smart Mater Struct2017; 26(10): 10.
19.
TangZSLimYYSmithST, et al. Development of analytical and numerical models for predicting the mechanical properties of structural adhesives under curing using the PZT-based wave propagation technique. Mech Syst Signal Process2019; 128: 172–190.
20.
LimYYSmithSTSohCK.Wave propagation-based monitoring of concrete curing using piezoelectric materials: review and path forward. NDT E Int2018; 99: 50–63.
21.
SongGBGuHCMoYL.Development of smart aggregates: multi-functional sensors for concrete structures—a tutorial and a review. Smart Mater Struct2008; 17(3): 17.
22.
LiWZLuoMZChenF.Early-age concrete strength development monitoring using piezoelectric self-emission and detection (SED) and coda wave energy (CWE). Smart Mater Struct2022; 31(8): 10.
GiurgiutiuVXuBChaoY, et al. Smart sensors for monitoring crack growth under fatigue loading conditions. Smart Struct Syst2006; 2(2): 101–113.
25.
ZhuHPLuoHAiDM, et al. Mechanical impedance-based technique for steel structural corrosion damage detection. Measurement2016; 88: 353–359.
26.
AiDMZhuHPLuoH, et al. Mechanical impedance-based embedded piezoelectric transducer for reinforced concrete structural impact damage detection: a comparative study. Constr Build Mater2018; 165: 472–483.
27.
ParkGInmanDJ.Structural health monitoring using piezoelectric impedance measurements. Philos Trans R Soc A Math Phys Eng Sci2007; 365(1851): 373–392.
28.
WangDSZhuHP.Monitoring of the strength gain of concrete using embedded PZT impedance transducer. Constr Build Mater2011; 25(9): 3703–3708.
29.
TsengKKHNaiduASK. Non-parametric damage detection and characterization using smart piezoceramic material. Smart Mater Struct2002; 11(3): 317–329.
30.
WangDSSongHYZhuHP.Numerical and experimental studies on damage detection of a concrete beam based on PZT admittances and correlation coefficient. Constr Build Mater2013; 49: 564–574.
31.
ZhaoSYFanSLYangJ, et al. Numerical and experimental investigation of electro-mechanical impedance-based concrete quantitative damage assessment. Smart Mater Struct2020; 29(5): 12.
32.
ZhaoSYFanSLYangJ, et al. A spherical smart aggregate sensor-based electro-mechanical impedance method for quantitative damage evaluation of concrete. Struct Health Monit2020; 19(5): 1560–1576.
33.
AiDMMoFHanYH, et al. Automated identification of compressive stress and damage in concrete specimen using convolutional neural network learned electromechanical admittance. Eng Struct2022; 259: 12.
34.
NaoumMCPapadopoulosNASapidisGM, et al. Efficacy of PZT sensors network different configurations in damage detection of fiber-reinforced concrete prisms under repeated loading. Sensors2024; 24(17): 23.
35.
NaoumMCSapidisGMPapadopoulosNA, et al. An electromechanical impedance-based application of real-time monitoring for the load-induced flexural stress and damage in fiber-reinforced concrete. Fibers2023; 11(4): 25.
36.
LiYMaYLHuXB.Early-age strength monitoring of the recycled aggregate concrete using the EMI method. Smart Mater Struct2021; 30(5): 14.
37.
HouSKongZHWuB, et al. Compactness monitoring of compound concrete filled with demolished concrete lumps using PZT-based smart aggregates. J Aerosp Eng2018; 31(5): 9.
38.
QiaoPZFanWChenFL. Smart health monitoring of recycled aggregate concrete in bridge applications. In: International Symposium on Life-Cycle Performance of Bridges and Structures. Beijing: Science Press, 2010, pp.115–123.
39.
QiaoPZFanWChenFL. Material property assessment and crack identification of recycled concrete with embedded smart cement modules. In: Conference on Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011. San Diego, CA: SPIE-Int Soc Optical Engineering, 2011.
40.
China Academy of Building Research. Specification for Mix Proportion Design of Ordinary Concrete (in Chinese). 2011, p.56.
41.
General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China. Recycled coarse aggregate for concrete (in Chinese). 2010, p.12.
42.
Ministry of Housing and Urban-Rural Development of the People’s Republic of China. Technical standard for recycled concrete structures (in Chinese). 2018.
43.
General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China. Standard for test methods of concrete physical and mechanical properties (in Chinese). 2019, p.69.
44.
WangWJZhaoLLiuYZ, et al. Mechanical properties and stress-strain relationship in axial compression for concrete with added glazed hollow beads and construction waste. Constr Build Mater2014; 71: 425–434.
45.
XiaoJZLiJBZhangC.Mechanical properties of recycled aggregate concrete under uniaxial loading. Cem Concr Res2005; 35(6): 1187–1194.
46.
ZhangCYanQXPandaGP, et al. Real-time monitoring stiffness degradation of hardened cement paste under uniaxial compression loading through piezoceramic-based electromechanical impedance method. Constr Build Mater2020; 256: 16.
47.
ShaFXuDYChengX, et al. Mechanical sensing properties of embedded smart piezoelectric sensor for structural health monitoring of concrete. Res Nondestruct Eval2021; 32(2): 88–112.
48.
LiYWeiMKHuXB.Damage monitoring of the planting balcony in vertical greenery buildings using the EMI method. Smart Mater Struct2023; 32(3): 15.
49.
LanCMLiuHHZhuangS, et al. Monitoring of crack repair in concrete using spherical smart aggregates based on electromechanical impedance (EMI) technique. Smart Mater Struct2024; 33(2): 28.
50.
SaravananTJBalamonicaKPriyaCB, et al. Piezoelectric EMI-based monitoring of early strength gain in concrete and damage detection in structural components. J Infrastruct Syst2017; 23(4): 15.
51.
XuYGLiuGR.A modified electro-mechanical impedance model of piezoelectric actuator-sensors for debonding detection of composite patches. J Intell Mater Syst Struct2002; 13(6): 389–396.
52.
KrajcinovicDLemaitreJ.Continuum damage mechanics: theory and applications. Springer, 1987.
53.
González-FonteboaBMartínez-AbellaFEiras-LópezJ, et al. Effect of recycled coarse aggregate on damage of recycled concrete. Mater Struct2011; 44(10): 1759–1771.
