Effect of Pull-Out Rate on Interfacial Bonding Strength of Fiber

2013 ◽  
Vol 807-809 ◽  
pp. 2831-2835
Author(s):  
Zhi Yuan Pan ◽  
Xiang Liu
Keyword(s):  
Friction Force ◽  
Bonding Strength ◽  
Shear Force ◽  
Uniaxial Tensile ◽  
Interface Bonding ◽  
Effect Factor ◽  
Leading Role ◽  
Pull Out ◽  
Critical Strain Rate ◽  
Interface Bonding Strength

This paper investigates the effect of different pull-out rates on interface bonding strength. The experimental results show that rate effect is also another significant effect factor which contributes to optical interface bonding strength. In the uniaxial tensile process, the interface bonding strength is attributed to the interplay between the shear force and the friction force. The critical strain rate for leading role between shear force and friction force is 10-1.5, when less than that friction force dominates in the interface bonding mechanism, otherwise shear force dominates.

scholarly journals Laboratory Investigation on the Interface Bonding between Portland Cement Concrete Pavement and Asphalt Overlay

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Fulu Wei ◽  
Jianfeng Cao ◽  
Hongduo Zhao ◽  
Bingye Han
Keyword(s):  
Portland Cement ◽  
Normal Stress ◽  
Bonding Strength ◽  
Influence Factors ◽  
Interface Bonding ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Leading Role ◽  
Tack Coat ◽  
Interface Bonding Strength

The interface bonding between Portland cement concrete (PCC) pavement and hot-mix asphalt (HMA) overlay plays an important role in the performance of the composite pavement. This research conducted a series of comprehensive laboratory studies to investigate the influence factors of the interface bonding strength using a self-designed direct shear test apparatus that can simultaneously apply normal stress and shear stress on a specimen. Four kinds of commonly used tack coat materials were systematically tested and compared under various combinations of normal stress and temperature. Then, coupling effects of the normal stress and temperature on the interface bonding between PCC and HMA were analyzed. The test results show that temperature has a significant impact on the adhesion of the tack coat. Emulsified asphalt was considered the optimal tack coat material because of its simple construction method. In addition, it was found that a damaged interface could still provide considerable bonding strength. Normal stress generated by traffic loads was beneficial to the interface bonding strength, especially at lower temperatures. The temperature had a significant effect on interface bonding and played a leading role in the failure mode of interface bonding.

Thermal Shock Behavior and Bonding Strength of MoSi2-BaO-Al2O3-SiO2 Gradient Porous Coating with Polymethyl Methacrylate Addition for Porous Fibrous Insulations

2018 ◽  
Vol 281 ◽  
pp. 493-498
Author(s):  
Ya Yu Su ◽  
Xiao Lei Li ◽  
Hui Jie Tang ◽  
Zhi Hao Zhao ◽  
Jian He
Keyword(s):  
Porous Structure ◽  
Thermal Shock ◽  
Bonding Strength ◽  
Thermal Shock Resistance ◽  
Porous Coating ◽  
Bonding Layer ◽  
Interface Bonding ◽  
Shock Resistance ◽  
Thermal Shock Behavior ◽  
Interface Bonding Strength

In order to improve the thermal shock behavior of high temperature resistant coating on porous fibrous referactory insulations, the MoSi2-BaO-Al2O3-SiO2(MoSi2-BAS) gradient porous coatings were designed by preparing a dense surface layer and a porous bonding layer with the method of brushing and subsequent sintering at 1773 K. The porous bonding layer was obtained by adding polymethyl methacrylate (PMMA) as pore former. As the content of PMMA increases, the MoSi2-BAS coatings changed from a dense structure into a gradient porous structure. The interface bonding strength and thermal shock resistance of the MoSi2-BAS coatings were investigated. The result shows that the as-prepared coating with gradient porous structure exhibited excellent thermal shock resistance, which remained gradient structure without cracking after thermal cycling 100 times between 1773 K and room temperature. And the interface bonding strength of the gradient porous coating reached 1.5±0.08 Mpa, which was much better than that of the dense coating.

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