scholarly journals COMPARATIVE STUDY OF THE TENSILE BOND STRENGTH OF RENDERING MORTARS IN CERAMIC AND CONCRETE STRUCTURAL BLOCKS

2021 ◽  
Author(s):  
Victória Noleto Pires ◽  
◽  
Indara Soto Izquierdo ◽  
Orieta Soto Izquierdo ◽  
Leonardo Ferreira Alves ◽  
...  
Keyword(s):  
Bond Strength ◽  
Tensile Bond Strength ◽  
Masonry Walls ◽  
Climate Conditions ◽  
Mode Of Application ◽  
Significant Difference ◽  
Concrete Blocks ◽  
Ceramic Blocks ◽  
Mixed Mortar ◽  
Structural Blocks

The tensile bond strength is one of the main properties of rendering mortars. It represents the adhesiveness ability between the mortar itself and the substrate. This property depends on several factors, such as the proportion and characteristics of the mortar materials and the substrate, along with the mode of application and climate conditions. The purpose of this paper was to analyze the tensile bond strength between three rendering mortar proportions in volume – 1: 1: 6, 1: 2: 9, and 1: 6 (with plasticizer additive) – each one applied on two substrates, ceramic structural blocks with roughcast and concrete structural blocks. The rendering mortars had their physical properties evaluated in fresh and hardened stages, as well as their compressive and tensile strengths in flexure. The tensile bond strength was determined by a pullout test on ceramic and concrete masonry walls exposed to external weather. The results showed that the 1: 1: 6 mixed mortar exhibited higher tensile bond strength in both substrates of ceramic blocks with roughcast and concrete blocks without preparation. Besides, among 1: 2: 9 and 1: 6 mortars there is no significant difference in tensile bond strength considering both substrates. Another conclusion was that the substrate type did not affect the final bond strength between the mortars.

scholarly journals The Influence of Lime Solution in Kneading Water Substitution on Cement Roughcast and Mortar Coating

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4174
Author(s):  
André M. Santos ◽  
Ângelo J. Costa e Silva ◽  
João M. F. Mota ◽  
João M. P. Q. Delgado ◽  
Fernando A. N. Silva ◽  
...  
Keyword(s):  
Bond Strength ◽  
Concrete Block ◽  
Tensile Bond Strength ◽  
Water Penetration ◽  
Strength Tests ◽  
Lime Solution ◽  
Concrete Blocks ◽  
Materials Used ◽  
Bonding Systems ◽  
Direct Tensile

The understanding of the mechanical fixation behavior of coatings is crucial for a better comprehension of the bonding systems, especially at the interface between the mortar and the substrate. Physical adherence is related, among other things, to the contents of the materials used in the roughcast and mortar coatings, due to the colloidal water penetration into the pores of the substrate. This work evaluated the influence of different lime solution additions replacing the kneading water in the preparation of roughcast and mortar coatings. Two types of substrates were investigated:ceramic bricks and concrete blocks. Three wall masonry panels were constructed, with dimensions of 220 × 180 cm2, one of concrete block and two of ceramic bricks, followed by the application of roughcast and mortar coating with an average thickness of 5 mm and 20 mm, respectively. Direct tensile bond strength tests were performed and the results, with a 95% confidence level, showed that substrate ceramic and treatment in the roughcast exhibited a better behavior regarding the distribution of the tensile bond strength of the tested specimens. However, no significant differences of the amount of addition used (0%, 5%, 10% and 15%) on the tensile bond strength were observed.

Bond Strength Stability of Self-adhesive Resin Cement to Etched Vitrified Yttria-stabilized Tetragonal Zirconia Polycrystal Ceramic After Thermomechanical Cycling

2019 ◽  
Vol 44 (5) ◽  
pp. 545-555 ◽  
Author(s):  
EV Maroun ◽  
JGA Guimarães ◽  
WG de Miranda ◽  
LRC Netto ◽  
AB Elias ◽  
...  
Keyword(s):  
Bond Strength ◽  
Hydrofluoric Acid ◽  
Tetragonal Zirconia ◽  
Resin Cement ◽  
Adhesive Resin ◽  
Thermomechanical Cycling ◽  
Significant Difference ◽  
Ceramic Blocks ◽  
Adhesive Resin Cement ◽  
Tetragonal Zirconia Polycrystal

SUMMARY The purpose of this study was to evaluate the influence of thermomechanical cycling on the bond strength stability of self-adhesive resin cement to vitrified yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramic. Y-TZP ceramic blocks were divided into four groups according to the surface treatments: AS, as sintered; SB, sandblasted with 50-μm Al2O3 particles; LG, vitrification with a low-fusing glaze and etching with 10% hydrofluoric acid; and HC, vitrification with a ceramic liner and etching with 10% hydrofluoric acid. Lithium disilicate ceramic blocks etched with 10% hydrofluoric acid for 20 seconds (EM) were also tested. Blocks of resin composite were cemented on the ceramic block surfaces using a self-adhesive resin cement. Half of the blocks from each group were cut into beams and submitted to microtensile bond strength (μTBS) testing after immersion in water at 37°C for 24 hours and the other half after mechanical (1,200,000 cycles, 98 N, 2.5 Hz) and thermal (10,000 cycles, 5-55°C, 30-second dwell time) cycling (TMC). Data were analyzed using one-way analysis of variance, Tukey's honest significant difference post hoc test, and Student t-test (α=0.05). After 24 hours, EM and LG presented similar and the highest μTBS, whereas AS showed the lowest μTBS (p<0.05). After TMC, EM presented the highest μTBS, followed by LG (p<0.05). Only EM and LG maintained the stability of μTBS after TMC (p>0.05). The bonding to Y-TZP ceramic vitrified with a low-fusing glaze withstood thermomechanical cycling.

scholarly journals Effect of tooth age on bond strength to dentin

2003 ◽  
Vol 11 (4) ◽  
pp. 342-347 ◽  
Author(s):  
Marcelo Giannini ◽  
Patrícia Chaves ◽  
Marcelo Tavares de Oliveira
Keyword(s):  
Bond Strength ◽  
Resin Composite ◽  
Testing Machine ◽  
Age Groups ◽  
In Vitro Study ◽  
Adhesive System ◽  
Tensile Bond Strength ◽  
Significant Difference ◽  
Diamond Saw

This in vitro study evaluated the effect of tooth age on the tensile bond strength of Prime & Bond NT adhesive system to dentin. Human third molars from the five age groups were analyzed: A- 17 to 20yrs, B- 21 to 30yrs, C- 31 to 40yrs, D- 41 to 50yrs and E- 51 to 63yrs. The occlusal enamel was removed using a diamond saw under water cooling and the dentin surface was wet-ground with 600-grit SiC paper to obtain flat surfaces. The adhesive system was applied according to the manufacturer's instructions and a 6-mm high resin "crown" was built-up with resin composite. Teeth were stored for 24 hours in distilled water at 37ºC and prepared for micro-tensile testing. Each specimen was mounted in a testing jig attached to a universal testing machine and stressed in tension at a crosshead speed of 0.5mm/min until failure. The means of tensile bond strength were (MPa): A- 21.42 ± 7.52ª; B- 30.13 ± 10.19ª; C- 31.69 ± 11.78ª; D- 30.69 ± 8.47ª and E- 35.66 ± 9.54ª. No statistically significant difference was observed among the age groups (p > 0.05). The results suggested that the tensile bond strength of the adhesive system was not significantly affected by dentin aging.

scholarly journals Influence of drying time of adhesive systems on the bond strength between resin cement and feldspathic ceramic

2016 ◽  
Vol 19 (1) ◽  
pp. 88
Author(s):  
Sabrina Alves Feitosa ◽  
Isabela Gomes Moura ◽  
Pedro Henrique Corazza ◽  
Cesar Dalmolin Bergolli ◽  
Clóvis Pagani ◽  
...  
Keyword(s):  
Bond Strength ◽  
Adhesive System ◽  
Resin Cement ◽  
Ceramic Surface ◽  
Drying Time ◽  
Ceramic Block ◽  
Significant Difference ◽  
Before And After ◽  
Cad Cam ◽  
Ceramic Blocks

<p><strong>O</strong><span lang="en-US"><strong>bjective: </strong></span><span lang="en-US">This study evaluated the effect of drying times of two total-etch &amp; rinse adhesives on the resin bond strength to a feldsphatic ceramic, before and after aging. </span><span lang="en-US"><strong>Material and Methods: </strong></span><span lang="en-US">Feldsphatic-ceramic CAD-CAM bars were cut into blocks (12×10×4 mm) with a cutting machine (N = 32). </span><span lang="en-US">Impressions were made of each ceramic block with silicone putty material and the negative space was filled with a composite resin.</span><span lang="en-US"> The bonding ceramic surface was etched with hydrofluoric acid, silanized, and the adhesive system (SB- Single Bond 2, 3M-ESPE; or PB- Prime &amp; Bond NT, Dentsply) was applied. The samples were dried at different times (5, 10 and 15 s) before the cementation. The resin and ceramic blocks were cemented by a dual cure resin cement. All samples were stored in distilled water at 37 °C for 24 h. For the μ-TBS test, the samples were sliced into microbars. Half of the bars of each block was tested after 24 h and, the other bars </span><span lang="en-US">were submitted to thermocycling (12,000×) and water storage (150 d)</span><span lang="en-US">. For the 24 h groups, the longer drying time increased (p &lt; 0.05) the bond strength of SB (water/alcohol adhesive), while reduced (p &lt; 0.05) for the PB group (acetone based adhesive). </span><span lang="en-US"><strong>Results: </strong></span><span lang="en-US">For the aged groups, the bond strength for the different drying times had no significant difference, for the both adhesives. </span><span lang="en-US"><strong>Conclusion:</strong></span><span lang="en-US"> Longer drying times increased the bond strength values of SB. Smaller drying times increased the bond strength values of PB. The aging protocol influenced the bond strength of SB groups.</span></p><p class="western"> </p><p class="western" lang="pt-BR"><span><span><span lang="en-US"><strong>Keywords:</strong></span></span></span><span><span><span lang="en-US"><span> Microtensile; Adhesion; Feldspar ceramic; Drying time; Adhesive system.</span></span></span></span></p>

scholarly journals Effect of air abrasion on tensile bond strength of a single-bottle adhesive/indirect composite system to enamel

2007 ◽  
Vol 18 (1) ◽  
pp. 45-48 ◽  
Author(s):  
Paulo César G. Silva ◽  
Mariane Gonçalves ◽  
Telma N. do Nascimento ◽  
André Luiz B. Centola
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Adhesive System ◽  
Tensile Bond Strength ◽  
Air Abrasion ◽  
Human Enamel ◽  
Significant Difference ◽  
Strength Tests ◽  
Indirect Composite ◽  
Phosphoric Acid Etching

This study evaluated the efficiency of air abrasion alone and associated with phosphoric acid etching on tensile bond strength of a single-bottle adhesive/indirect composite restorative system (Bond 1/Alert) to human enamel. Forty enamel surfaces from extracted human third molars were assigned to 4 groups (n= 10). Mach 4.1 (Kreativ Inc.) air abrasion equipment was used for 20 s. A special system of rod pairs aligned in a specific apparatus was used for tensile strength tests, according to ISO/TR 11405 standard (1994) with some modifications. Bond strength means were: G1 (air abrasion + rinsing + condensable composite resin Alert) = 3.46 ± 0.83 MPa; G2 (air abrasion + rinsing + Bond 1 adhesive system + Alert) = 4.00 ± 1.60 MPa; G3 (air abrasion + rinsing + 37% phosphoric acid + rinsing + Bond 1 + Alert) = 20.80 ± 3.95 MPa; and G4 (37% phosphoric acid + rinsing + Bond 1 + Alert) = 17.00 ± 2.74 MPa. The statistical analysis by Kruskal-Wallis test revealed that G1 and G2 presented statistically significant difference (p< 0.05) from G3 and G4 (p<0.01) and G1 and G3 did not differ significantly (p> 0.05) from G2 and G4, respectively.

Micro-tensile bond strength of adhesive systems applied on occlusal primary enamel

2004 ◽  
Vol 28 (4) ◽  
pp. 333-337 ◽  
Author(s):  
Ana Cláudia Ramires-Romito ◽  
Alessandra Reis ◽  
Alessandro Dourado Loguercio ◽  
Mário Fernando de Góes ◽  
Rosa Helena Miranda Grande
Keyword(s):  
Bond Strength ◽  
Tensile Force ◽  
Tensile Bond Strength ◽  
Primary Molars ◽  
Adhesive Systems ◽  
Primary Molar ◽  
Significant Difference ◽  
Bond Strengths ◽  
Saliva Contamination ◽  
Bonding Site

The aim of this study was to evaluate the micro-tensile bond strength of adhesive systems (OptiBond Solo™, Kerr; Prime & Bond NT®, Dentsply) on occlusal surface of primary molars. The adhesives were tested under manufacturers' specifications and after contamination of the bonding site with saliva. Hourglass cylindrical-shaped samples were obtained and subjected to a tensile force. No significant difference was observed among the groups. OptiBond Solo™ and Prime & Bond NT® showed similar values of bond strengths when applied on occlusal enamel of primary molar under either saliva contamination or not.

A Study of Basic Properties of Cellulose Ether Modified Dry-Mixed Mortar

2013 ◽  
Vol 395-396 ◽  
pp. 621-625
Author(s):  
Peng Xuan Duan ◽  
Ye Zhang ◽  
Ying Li
Keyword(s):  
Bond Strength ◽  
Water Retention ◽  
Quality Evaluation ◽  
Tensile Bond Strength ◽  
Cellulose Ether ◽  
Strength Ratio ◽  
Effect Evaluation ◽  
Evaluation Indexes ◽  
Basic Properties ◽  
Mixed Mortar

In this paper, the quality evaluation indexes of cellulose ether (CE) modified dry-mixed mortar are proposed by the comparison of properties of contrast mortar. The technical indexes of CE modified mortar include water retention, anti-sliding value, time difference of final set and the tensile bond strength ratio which give a good guidance for the application effect evaluation of cellulose used in dry-mixed mortar.

scholarly journals Effect of Enamel Etching on Tensile Bond Strength of Brackets Bonded In Vivo with a Resin-reinforced Glass Ionomer Cement

2007 ◽  
Vol 77 (1) ◽  
pp. 113-116 ◽  
Author(s):  
Gabriella Rosenbach ◽  
Julio Pedrae Cal-Neto ◽  
Silvio Rosan Oliveira ◽  
Orlando Chevitarese ◽  
Marco Antonio Almeida
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Tensile Bond Strength ◽  
Glass Ionomer ◽  
Significant Difference ◽  
Group 2 ◽  
Ionomer Cement ◽  
Group 1

Abstract Objective: To evaluate the influence of enamel etching on tensile bond strength of orthodontic brackets bonded with resin-reinforced glass ionomer cement. Materials and Methods: The sample group consisted of 15 patients who had indications for extraction of four premolars for orthodontic reasons, equally divided into two different groups according to bracket and enamel preparation. Brackets were bonded in vivo, by the same operator, using a split mouth random technique: Group 1 (control), phosphoric acid + Fuji Ortho LC; Group 2, Fuji Ortho LC without acid conditioning. The teeth were extracted after 4 weeks using elevators. An Instron Universal Testing Machine was used to apply a tensile force directly to the enamel-bracket interface at a speed of 0.5 mm/min. The groups were compared using a Mann-Whitney U-test and Weibull analysis. Results: Mean results and standard deviations (in MPa) for the groups were: Group 1, 6.26 (3.21), Group 2, 6.52 (2.73). No significant difference was observed in the bond strengths of the two groups evaluated (P = .599). Conclusions: Fuji Ortho LC showed adequate shear bond strength and may be suitable for clinical use.

scholarly journals Bond Capability of Universal Adhesive Systems to Dentin in Self-etch Mode after Short-term Storage and Cyclic Loading

2017 ◽  
Vol 11 (1) ◽  
pp. 276-283 ◽  
Author(s):  
Daniele Morosini Costa ◽  
Deise Caren Somacal ◽  
Gilberto Antonio Borges ◽  
Ana Maria Spohr
Keyword(s):  
Cyclic Loading ◽  
Bond Strength ◽  
Testing Machine ◽  
Tensile Bond Strength ◽  
Short Term ◽  
Universal Adhesive ◽  
Significant Difference ◽  
Self Etch ◽  
Term Storage

Objective: The aim was to evaluate, in vitro, the tensile bond strength to dentin of Scotchbond Universal (SU), All-Bond Universal (AU) and One Coat 7 Universal (OC7) adhesives applied in self-etch mode, after 24 h of storage and after 500,000 loading cycles, using Clearfil SE Bond (SE) as a control. Materials and Methods: The adhesives were applied on the dentin of bovine teeth, followed by the application of a composite resin. Thirty specimens were obtained for each adhesive. Half of the specimens were submitted to cyclic loading for 500,000 cycles. All specimens were submitted to a tensile bond strength test in a universal testing machine at a crosshead speed of 0.5 mm/minute. Results: According to two-way ANOVA and Tukey’s test (α=5%), the interaction between the adhesive and cyclic loading factors was significant (p=0.001). The means followed by the same letter represent no significant difference in the bond strength (MPa) after 24 h: OC7=7.86A (±2.90), SU=6.78AB (±2.03), AU=5.61BC (±2.32), and SE=3.53C (±1.89). After cyclic loading, SE, SU and AU maintained bond strength comparable to 24 h period. There was a significant decrease only for OC7. Conclusion: SU, AU and OC7 had bond strength to dentin comparable to that of SE. Only OC7 had decreased bond strength to dentin after cyclic loading.

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