Research on Bonding Strength of Steel and Concrete with Different Bonding Interfaces

For the purpose of researching the natural bonding behavior of different interfaces between steel and concrete in SRC structures, four specimens are designed to launch the monotonic push-out loading test. Each specimen is used to consider one case, including the bonding of the external flange, internal flange, web and whole cross-sections with the concrete. Failure process and modes of these specimens were observed during the test. Load-slip curves and ultimate bond strength are obtained and the bonding strength between different interfaces of steel and concrete was analyzed. The results show that the bonding strengths of different interfaces in SRC members are not equal. The minimum bonding strength occurs in web, the bonding strength of external flange is higher, and the maximum bonding strength occurs in internal flange, the ratio of the strength is 1:1.39:1.59.

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Experimental Research on Bond Strength between Rebar and Concrete after High Temperature

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.71-78.1057 ◽

2011 ◽

Vol 71-78 ◽

pp. 1057-1061 ◽

Cited By ~ 4

Author(s):

Ke Fang Yin ◽

Yang Han ◽

Yi Liu

Keyword(s):

Reinforced Concrete ◽

High Temperature ◽

Bond Strength ◽

Experimental Research ◽

Bonding Strength ◽

Different Temperatures ◽

Ultimate Bond Strength

With the centrally pulling-out test, the bond strength of reinforced concrete is measured with different temperatures and different cooling ways after high temperature; and the ultimate bond strength and slip of reinforced and concrete under different conditions are analyzed. The results show that the bonding strength declines gradually with the increase of temperature, and the ultimate slippage also decreases gradually.

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Study on the Mechanical Performances of the Insulation Board

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.584-586.968 ◽

2014 ◽

Vol 584-586 ◽

pp. 968-971

Author(s):

Yi Sun ◽

Ji Shu Sun ◽

Yuan Ming Dou ◽

Hong Liang Cui

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Flexural Strength ◽

Bond Strength ◽

Bonding Strength ◽

Failure Process ◽

Test Results ◽

Insulation System ◽

Technical Requirements ◽

Mechanical Performances

The basic mechanical properties of the insulation board in external thermal insulation system are studied in this paper. According to the structure of the board, the relevant tests are designed, which includ the plate bearing capacity, the bond strength, the compressive strength and the flexural strength. The test results show that the security performance of the composite insulation board is high and bonding strength is good, compressive strength is high in the case of meeting the basic technical requirements. Besides, with the increase of the insulation board’s thickness, its flexural strength would increase.What’s more, due to the mesh effect on internal reinforcement, failure process has a certain ductility.

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Effect of Biomimetic Remineralization of Post Space Root Dentin on Push out Bond Strength of Fiber Post bonded with Self-adhesive Resin Cement (An in Vitro Study)

10.21203/rs.3.pex-1243/v1 ◽

2020 ◽

Author(s):

Afaf Mohamed Al-Najajrah ◽

Carl Hany Halim ◽

Omnia Nabil

Keyword(s):

Bond Strength ◽

Bonding Strength ◽

In Vitro Study ◽

Resin Cement ◽

Fiber Post ◽

Adhesive Resin ◽

Adhesive Resin Cement ◽

Post Space ◽

Push Out

Abstract Self-adhesive resin cement is highly recommended for cementation of fiber post systems, since it binds chemically with calcium ions in the hydroxyapatite particles without surface pretreatments of dentin. Unfortunately, chelating agents that are used to remove smear layer reduce the calcium ion content of superficial dentin. This study aims to evaluate the effect of remineralization of dentin on the bonding strength of fiber post using the biomimetic remineralizing agent CPP-ACP in vitro. Such a study will provide evidence on the possibility of improving bonding strength by increasing dentin mineral content. At the same time, it should be supported by further clinical studies since it remains in vitro.21 freshly extracted single rooted teeth will be treated endodontically, prepared for post space, and divided randomly into 3 groups: EDTA+CPP-ACP, EDTA + NaOCl, EDTA alone. Fiber post will be cemented and push out bond strength will be measured for all groups. The expected time of study is 6-8 months.

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Evaluation of the dislodgement resistance of bioceramic reparative cements placed in a retrograde cavity using a different technique

Brazilian Journal of Oral Sciences ◽

10.20396/bjos.v18i0.8657393 ◽

2019 ◽

Vol 18 ◽

pp. e191600

Author(s):

Hakan Gokturk ◽

Ismail Ozkocak ◽

Seda Tan-Ipek ◽

Osman Demir

Keyword(s):

Bond Strength ◽

Analysis Of Variance ◽

Cross Sections ◽

Calcium Silicate ◽

Testing Machine ◽

Hard Tissue ◽

Filling Materials ◽

Universal Testing ◽

Prior Application ◽

Push Out

Aim: Calcium silicate-based fillings have been widely used in surgical endodontic treatment because of hard-tissue conductive and inductive properties. The aim of present study is to investigate the bond strength of different calcium silicate-based fillings in retrograde cavities. Methods: Forty-four maxillary single rooted teeth were endodontically treated. The apical portions of the teeth were removed and root-end cavities were prepared using an ultrasonic tip. The roots were randomly divided into four experimental groups (n = 11) according to the material used; (1) MTA-FILLAPEX, (2) MTA Repair HP, (3) MTA-FILLAPEX+ MTA Repair HP, and (4) MTA Plus. Two horizontal cross sections (1±0.1 mm thick) from each specimen were resected from the apices. These sections were placed in a universal testing machine to evaluate the push-out bond strength force required for dislodgement of the root end filling was recorded. The failure type was also evaluated by using a stereomicroscope. The differences in bond strength were analyzed using the two-way analysis of variance (ANOVA). Results: MTA-FILLAPEX and MTA Plus displayed the lowest and highest dislocation resistance, respectively (P < 0.05). In the apical level, bond strength was significantly higher than the coronal level in all groups except for MTA-FILLAPEX. Mixed failure was prevalent in all groups, except for MTA-FILLAPEX, which showed purely cohesive failures. Conclusions: Investigated calcium silicate-based filling materials showed different bond strength to the root-end cavity. The bond strength was significantly decreased when the prior application of MTA-FILLAPEX before delivery of MTA Repair HP.

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Effect of surface treatments on push-out bond strength of calcium silicate-based cements to fiber posts

BMC Oral Health ◽

10.1186/s12903-021-01518-y ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Amr M. Elnaghy ◽

Ayman Mandorah ◽

Ali H. Hassan ◽

Alaa Elshazli ◽

Shaymaa Elsaka

Keyword(s):

Bond Strength ◽

Surface Treatment ◽

Glass Fiber ◽

Calcium Silicate ◽

Surface Treatments ◽

The Other ◽

Fiber Posts ◽

Glass Fiber Posts ◽

Push Out ◽

Effect Of Surface

Abstract Background To evaluate the effect of surface treatments on the push-out bond strength of Biodentine (BD) and white mineral trioxide aggregate (WMTA) to fiber posts. Methods Two brands of fiber posts were used: Reblida post; RP and RelyX post; RX. Each type of post (n = 80/group) was divided into four groups (n = 20/group) and exposed to surface treatment as follows: Control (no treatment), sandblasting (SB), hydrofluoric acid (HF), and TiF4 4 wt/v%. Each group was further subdivided into two subgroups (n = 10/subgroup) based on the type of CSCs used as follows: Subgroup A: BD and Subgroup B: WMTA. Push-out bond strength of BD and WMTA to glass fiber posts was assessed. Data were statistically analyzed using three-way ANOVA and Tukey’s test. A Weibull analysis was performed on the push-out bond strength data. Results BD showed higher bond strength than WMTA (P < 0.001). The push-out bond strength for posts treated with TiF4 4 wt/v% showed greater bond strength than the other surface treatments (P < 0.05). The BD/RP-TiF4 4 wt/v% showed the greater characteristic bond strength (σ0) (15.93) compared with the other groups. Surface treatments modified the surface topography of glass fiber posts. Conclusions The BD/RP-TiF4 4 wt/v% showed greater bond strength compared with the other groups. The TiF4 4 wt/v% surface treatment enhanced the bond strength of BD and WMTA to glass fiber posts than the other treatments. Surface treatment of fiber post with TiF4 4 wt/v% could be used to improve the bond strength with calcium silicate-based cements.

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Research on bond–slip performance between pultruded glass fiber-reinforced polymer tube and nano-CaCO3 concrete

Nanotechnology Reviews ◽

10.1515/ntrev-2020-0036 ◽

2020 ◽

Vol 9 (1) ◽

pp. 637-649 ◽

Cited By ~ 4

Author(s):

Zhan Guo ◽

Qingxia Zhu ◽

Wenda Wu ◽

Yu Chen

Keyword(s):

Bond Strength ◽

Concrete Strength ◽

Fiber Reinforced Polymer ◽

Glass Fiber Reinforced Polymer ◽

Bond Slip ◽

Ordinary Concrete ◽

Bond Performance ◽

Reinforced Polymer ◽

Glass Fiber Reinforced ◽

Push Out

AbstractThe article describes an experimental study on the bond–slip performance between the pultruded glass fiber-reinforced polymer (GFRP) tube and the nano-CaCO3 concrete. Taking the nano-CaCO3 concrete strength and GFRP tube thickness as primary parameters, nine specimens were designed and tested to study the influence of these parameters on the bond strength of the specimens. Besides, three specimens filled with the ordinary concrete were also tested by using the push-out tests to make comparisons with the bond performance of the specimens filled with nano-CaCO3 concrete. A total of four push-out tests were conducted on each specimen. The experimental results indicate that there are two types of axial load–slip curves for each specimen in four push-out tests. Moreover, comparison of the results of the push-out tests in the same direction shows that the bond failure load of the specimen decreases with the increase in the number of push-out tests. Based on the analysis of the test results, it is shown that the bond performance between the GFRP tube and the nano-CaCO3 concrete is better than that between the GFRP tube and the ordinary concrete. Furthermore, as the nano-CaCO3 concrete strength increases, the bond strength of the specimens decreases, indicating that the concrete strength has a negative effect on the bond strength. When the nano-CaCO3 concrete strength is relatively smaller (C20), the bond strength of the specimens decreases with the increase in the thickness of the GFRP tube. However, when the nano-CaCO3 concrete strength is relatively larger (C30 and C40), the bond strength of the specimens increases as the thickness of the GFRP tube increases.

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Finite element analysis and bond strength of a glass post to intraradicular dentin: Comparison between microtensile and push-out tests

Dental Materials ◽

10.1016/j.dental.2008.03.004 ◽

2008 ◽

Vol 24 (10) ◽

pp. 1405-1411 ◽

Cited By ~ 62

Author(s):

Carlos J. Soares ◽

Fernanda R. Santana ◽

Carolina G. Castro ◽

Paulo C.F. Santos-Filho ◽

Paulo V. Soares ◽

...

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Bond Strength ◽

Element Analysis ◽

Push Out

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Micro Push-Out Bond Strength of Resin Composite to Dentin in Primary Dentition Using Three Universal Adhesives with Different pH: An In Vitro Study

Applied Sciences ◽

10.3390/app11146349 ◽

2021 ◽

Vol 11 (14) ◽

pp. 6349

Author(s):

Regina María Del Río Carrillo ◽

Pedro Molinero-Mourelle ◽

Vicente Vera ◽

Pablo Romero Villaba ◽

Elizabeth Casañas ◽

...

Keyword(s):

Bond Strength ◽

Resin Composite ◽

In Vitro Study ◽

Primary Dentition ◽

Vitro Study ◽

Deciduous Tooth ◽

Universal Adhesives ◽

Type Of Failure ◽

Push Out

To evaluate the bond strength of different universal adhesives on deciduous tooth dentineand their relationship with the composition and potential of hydrogen (pH). Methods: An in vitromicro push-out test on 150 samples (n = 50) per group per adhesive, namely, Adhese Universal(ADH; Ivoclar Vivadent), Futurabond U (FUT; Voco GmbH) (Test), and Scotchbond Universal withpre-conditioning (SCO; 3M) (Control), to record bond strength (BS) and type of adhesive failure.Results: The results of the different adhesives (megapascals (MPa)) varied, showing no statisticalsignificance. The corresponding averages are in MPa: ADH, 13.66 2.81; FUT, 14.48 2.88; SCO,14.98 3.96. Additionally, the frequency of type of failure was as follows: mixed (60.7%), adhesive(27.3%), and cohesive (12%). Conclusions: SCO, with a pH of 2.7, showed greater resistance tofracture, while FUT, with a pH of 2.3 and no pre-conditioning, approached the same values, being aone-step adhesive. No relationship was found between failure and type of adhesive.

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