Study on the Self-Monitoring of Bending Fatigue Cumulative Damage for Carbon Nanofiber Polyurethane Cement

Polyurethane cement (PUC) is a kind of high-strength composite bending and strengthening material that is made by adding an appropriate amount of super fine aggregate, such as cement, into the polyurethane matrix. Carbon nanofiber polyurethane cement (CNFPUC) prepared by adding an appropriate amount of carbon nanofiber (CNF) can significantly reduce the resistivity of PUC. In order to reveal the change regulation of electrical resistivity of CNFPUC under fatigue load, the four-point bending fatigue life test of CNFPUC under different temperatures and stress levels was conducted by using a multifunction test device on a mixture of UTM-30 asphalt. The results showed that the resistivity increased slightly with the increase of bending strain in the process of the CNFPUC bending test, which presented a two-stage trend of a small increase and a sharp increase, and the maximum bending tensile stress was up to 26.65 MPa. Under periodic load, the resistivity increased with the increase of stress level and cycle times. When the damage amount reached 90%, the fatigue resistivity increased sharply, and with the increase of stress level, the effect of temperature on resistivity decreased gradually. This study may provide a theoretical basis for practical engineering applications.

[1]  O. Crosby,et al.  nanotubes , 2020, Catalysis from A to Z.

[2]  Kyungwho Choi,et al.  Void detection of cementitious grout composite using single-walled and multi-walled carbon nanotubes , 2019, Cement and Concrete Composites.

[3]  Nan Yang,et al.  Dispersion and Pressure Sensitivity of Carbon Nanofiber-Reinforced Polyurethane Cement , 2018, Applied Sciences.

[4]  Quansheng Sun,et al.  Experimental Study of Reinforced Concrete T-Beams Strengthened with a Composite of Prestressed Steel Wire Ropes Embedded in Polyurethane Cement (PSWR–PUC) , 2018 .

[5]  Jianting Zhou,et al.  Experimental Research on Fatigue Damage of Reinforced Concrete Rectangular Beam , 2018 .

[6]  Quansheng Sun,et al.  The Use of Wire Mesh-Polyurethane Cement (WM-PUC) Composite to Strengthen RC T-beams under Flexure , 2018 .

[7]  F. Vecchio,et al.  High-cycle fatigue life prediction of reinforced concrete deep beams , 2017 .

[8]  M. Szeląg.  Mechano-Physical Properties and Microstructure of Carbon Nanotube Reinforced Cement Paste after Thermal Load , 2017, Nanomaterials.

[9]  Jie Li,et al.  A probabilistic analyzed method for concrete fatigue life , 2017 .

[10]  Steffen Marx,et al.  Fatigue behaviour of a normal‐strength concrete – number of cycles to failure and strain development , 2016 .

[11]  Zhang Kexin,et al.  Strengthening of a Reinforced Concrete Bridge with Polyurethane-cement Composite (PUC) , 2016 .

[12]  J. Aguiar,et al.  Concrete with triphasic conductive materials for self-monitoring of cracking development subjected to flexure , 2016 .

[13]  Jian-kang Chen,et al.  The experimental study on the correlation of resistivity and damage for conductive concrete , 2016 .

[14]  Martin Claßen,et al.  Concrete fatigue in composite dowels , 2016 .

[15]  J. Aguiar,et al.  Self-monitoring of freeze–thaw damage using triphasic electric conductive concrete , 2015 .

[16]  Josef Hegger,et al.  Structural Assessment of Concrete Bridges in Germany—Shear Resistance under Static and Fatigue Loading , 2015 .

[17]  Konrad Bergmeister,et al.  Dynamically loaded concrete structures – monitoring‐based assessment of the real degree of fatigue deterioration , 2014 .

[18]  Hejun Li,et al.  Monitoring the damage evolution of flexural fatigue in unidirectional carbon/carbon composites by electrical resistance change method , 2014 .

[19]  Zheng Hua Zhu,et al.  On the mechanism of piezoresistivity of carbon nanotube polymer composites , 2014 .

[20]  Hansang Kim.  Enhanced crack detection sensitivity of carbon fiber composites by carbon nanotubes directly grown on carbon fibers , 2014 .

[21]  Sibdas Singha Mahapatra,et al.  TAILORED AND STRONG ELECTRO-RESPONSIVE SHAPE MEMORY ACTUATION IN CARBON NANOTUBE-REINFORCED HYPERBRANCHED POLYURETHANE COMPOSITES , 2014 .

[22]  Haleem K. Hussain,et al.  Experimental study to investigate mechanical properties of new material polyurethane–cement composite (PUC) , 2014 .

[23]  J. A. Mohandesi,et al.  Fatigue behavior of polypropylene fiber reinforced concrete under constant and variable amplitude loading , 2013 .

[24]  Haleem K. Hussain,et al.  Study of Concrete Strain for T-Beams Retrofitting by Poly-Urethane-Cement Material (PUC) , 2013 .

[25]  Haleem K. Hussain,et al.  An experimental study on strengthening reinforced concrete T-beams using new material poly-urethane-cement (PUC) , 2013 .

[26]  D. Chung.  Carbon materials for structural self-sensing, electromagnetic shielding and thermal interfacing , 2012 .

[27]  Rashid K. Abu Al-Rub,et al.  Mechanical Properties of Nanocomposite Cement Incorporating Surface-Treated and Untreated Carbon Nanotubes and Carbon Nanofibers , 2012 .

[28]  Alkiviadis S. Paipetis,et al.  On the fatigue life prediction of CFRP laminates using the Electrical Resistance Change method , 2011 .

[29]  Andrei N Zagrai,et al.  Connection Between Strength Reduction, Electric Resistance and Electro-Mechanical Impedance in Materials with Fatigue Damage , 2010 .

[30]  Jae Whan Cho,et al.  Electroactive shape memory performance of polyurethane composite having homogeneously dispersed and covalently crosslinked carbon nanotubes , 2010 .

[31]  Zhi Hong Xu,et al.  Fatigue Damage Sensing in Smart Carbon Fiber Concrete by Electrical Resistivity Measurement , 2007 .

[32]  D.D.L. Chung,et al.  Self-sensing of flexural strain and damage in carbon fiber polymer-matrix composite by electrical resistance measurement , 2006 .

[33]  D.D.L. Chung,et al.  Self-sensing of flexural damage and strain in carbon fiber reinforced cement and effect of embedded steel reinforcing bars , 2006 .

[34]  H. Otsuka,et al.  A Foundational Study on Static Mechanical Characteristics of the Super Lightweight and High Strength Material Using Fly-ash , 2006 .

[35]  D. Chung,et al.  Defect dynamics of cement paste under repeated compression studied by electrical resistivity measurement , 2001 .

[36]  D.D.L. Chung,et al.  Early fatigue damage in carbon-fibre composites observed by electrical resistance measurement , 1998 .

[37]  W. Whitten.  Composites , 1977, Science.