Effect of the Thickness of Adhesive Layer on the Shear Strength of Adhesive Bond by Compression Loading

2004 ◽  
Vol 2004.42 (0) ◽  
pp. 69-70
Author(s):  
Takeyasu KISHI ◽  
Tomohiro OKUMURA
Keyword(s):  
Shear Strength ◽  
Adhesive Layer ◽  
Adhesive Bond ◽  
Compression Loading

Investigation into Shear Experiment on Interface between Asphalt Pavement and Concrete Bridge Deck

2011 ◽  
Vol 197-198 ◽  
pp. 1435-1442
Author(s):  
Hong Fu Liu ◽  
Jian Long Zheng ◽  
Guo Ping Qian ◽  
Yun Yong Huang
Keyword(s):  
Shear Strength ◽  
Asphalt Pavement ◽  
Adhesive Layer ◽  
Interface Shear ◽  
Contact State ◽  
Modified Asphalt ◽  
Interface Contact ◽  
Concrete Bridge Deck ◽  
Sbs Modified Asphalt ◽  
Concrete Deck

This paper describes the laboratory measurement of shear interface properties between asphalt pavement and concrete bridge deck using the shear test. The main factors affecting shear strength are interface frictional resistance and adhesive stress from material of waterproof layer. Firstly, we simplify the whole system by considering the asphalt pavement as an elastic layer and the cement concrete deck a rigid base. And make a sensitivity analysis on interface contact state and the material modulus of waterproof layer. The maximum shear stress increases as interface contact state changes from continuous to smooth and as modulus of waterproof layer material decreases. Secondly, an interface shear experiment is conducted with the application of portable shear apparatus. With interface shear strength as evaluation indicator, shear strength of different interface treatments is arranged in descending order, i.e. cleaning up laitance and spreading aggregate between layers; only cleaning-up laitance; leaving the surface untreated. While the descending order for shear strength of different waterproof materials can be listed as follows: SBS modified asphalt, penetration grade of 70 asphalt. Therefore, based on the laboratory test results, it is recommended that before applying waterproof adhesive layer, laitance and dust on concrete deck surface should be cleaned up and keeping it dry. And the material for waterproof adhesive layer should be SBS modified asphalt with one-size aggregate of 4.75mm-9.5 mm spreading on.

Shear Strength of Irradiated Insulation under Combined Shear/Compression Loading

1996 ◽  
pp. 81-88 ◽  
Author(s):  
R. Reed ◽  
T. Bauer-McDaniel ◽  
P. Fabian ◽  
C. Hazelton ◽  
N. Munshi ◽  
...  
Keyword(s):  
Shear Strength ◽  
Compression Loading

Effect of Adhesive Layer Thickness on the Shear Strength of Adhesively Bonded Steel Joints in Wet Environment

2016 ◽  
Vol 836 ◽  
pp. 78-82 ◽  
Author(s):  
Sugiman ◽  
Ilham Akbar ◽  
Emmy Dyah Sulistyowati ◽  
Paryanto Dwi Setyawan
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Adhesive Layer ◽  
Static Strength ◽  
Adhesive Joints ◽  
Deionized Water ◽  
Adhesively Bonded ◽  
Moist Environment ◽  
Adhesive Thickness ◽  
Steel Joints

The paper presents the static strength of adhesively bonded steel joints aged in deionized water at a temperature of 60°C for 15 days at various adhesive thicknesses from 0.1 mm to 0.5 mm. Water uptake and the bulk adhesive tensile properties after aged in the same environment as the joints were also presented. It has been shown that water diffusion into the adhesive is non Fickian. The absorbed water in the adhesive significantly decreases the mechanical properties and it affects the static strength of the bonded steel joints. The effect of water is shown to be significant when the adhesive thickness is thicker than 0.2 mm as the static strength decreases sharply. This information is useful when designing the adhesive joints using thick adhesive layer exposed in moist environment.

Zeolite filler, activated in electromagnetic fields, for the production of plywood

10.12737/2186 ◽  
2014 ◽  
Vol 3 (4) ◽  
pp. 94-102 ◽  
Author(s):  
Анисимов ◽  
Maksim Anisimov
Keyword(s):  
Shear Strength ◽  
Electromagnetic Fields ◽  
Adhesive Layer ◽  
Formaldehyde Emission ◽  
Pulsed Magnetic Fields ◽  
Optimal Processing ◽  
Adhesive Compositions ◽  
Processing Modes ◽  
Industrial Use ◽  
Reduction Of Emissions

In the course of this work the reduction of emissions of free formaldehyde from the finished plywood is identified, as well as an increase in shear strength to the adhesive layer. Obtained effects in the manufacture of plywood are due to the use of adhesive compositions using natural zeolite sorbent filler – clinoptilolite, previously activated in various electromagnetic fields (fields of over high frequency and weak pulsed magnetic fields). The optimal processing modes of minerals with electromagnetic fields are defined, providing an optimum ratio of values ​​of free formaldehyde emission levels and shear strength to the adhesive layer. The results indicate the possibility of industrial use of the developed techniques.

The Effect of Geometry and Material Properties on the Load Capacity of Single-Strapped Adhesive Bonded Joints

2008 ◽  
Vol 399 ◽  
pp. 89-96 ◽  
Author(s):  
Marin Sandu ◽  
Adriana Sandu ◽  
Dan Mihai Constantinescu ◽  
Ştefan Sorohan
Keyword(s):  
Adhesive Bonding ◽  
Load Capacity ◽  
Dissimilar Materials ◽  
Adhesive Layer ◽  
Adhesive Bond ◽  
Bonded Joints ◽  
Adhesively Bonded ◽  
Adhesive Bonded Joints ◽  
Major Factors ◽  
Selection Of

Adhesive bonding is a particularly effective method of assembling complex structures, especially those made from dissimilar materials. If the joint is well designed and correctly executed, the adhesive bond ought to be one of the strongest components of the structure and most certainly should not be the reason for reducing the load capacity or fatigue life. The major factors determining the integrity of an adhesive bond are selection of the most appropriate adhesive, joint design, preparation of the bonding surfaces, strict quality control in production and monitoring in service. This work focuses on the evaluation of the load capacity of some configurations of adhesively bonded single-strapped joints based on finite element analyses. The adhesive layer thickness, the overlap length, the adherent and strap thicknesses were varied as well as the materials properties.

scholarly journals Shear Strength of Tack Coat on Flexible Pavement and Composite Pavement

2018 ◽  
Vol 4 (2) ◽  
pp. 121
Author(s):  
Tampanatu P. F. Sompie ◽  
Syanne Pangemanan
Keyword(s):  
Shear Strength ◽  
Adhesive Layer ◽  
Flexible Pavement ◽  
Concrete Pavement ◽  
Direct Shear ◽  
Rigid Pavement ◽  
Tack Coat ◽  
Directorate General ◽  
The Right ◽  
Made In

Tack coat is a thin layer that spread on the surface of existing pavement or concrete pavement. The function of this layer is as an adhesive layer needed to give adhesive power between the existing pavement course and new pavement course or with the concrete pavement, therefore created one strong unity and would bond both, in order to withstand the sheer strength caused by the vehicle load on top of it. Strong adhesiveness of the tack coat course will add sheer strength between the interfaces of the pavement courses. Strong adhesiveness is gained from the asphalt mixed with solvent, therefore created the right viscosity level of the tack coat solution. This research was aimed to measure the sheer strength of tack coat by using modified direct shear asphalt samples. The research method used was by using gauge to measure the sheer strength of tack coat on asphalt sample which was the modified direct shear. While the samples were consisted of 2 types, the asphalt solvent sample as a model of flexible pavement course of AC-WC pavement type with optimum asphalt content of 6.1%, and concrete solvent sample as a model of rigid pavement. These samples were made in briquette form, made with Marshall Mould with 4 inches diameter. The tack coat solvent was made in three solvent variations, which was referring to the standard of the Directorate General of Highways. From this research, it could be concluded that the highest shear strength for flexible pavement was reached on the tack coal solvent mix composition of 30 pph and composite pavement of 15 pph. Tack coat spread rate of 0.25 l/m2 gave highest shear strength on flexible pavement and composition pavement of 0.35 l/m2. Balance was reached on flexible pavement on tack coat variation of 30 pph and 50 pph; while on composite pavement, balance was reached on tack coat solvent variation of 15 pph and 30 pph. This modified direct shear sample could be a method to measure shear strength of tack coat on flexible pavement and composite pavement.

Stress/Strain Behaviour of Mechanical and Adhesive Joints in Timber Façade Applications

2020 ◽  
Vol 868 ◽  
pp. 142-149
Author(s):  
Barbora Nečasová ◽  
Liška Pavel ◽  
Michal Novotný
Keyword(s):  
Adhesive Layer ◽  
Adhesive Bond ◽  
Solid Wood ◽  
Bonded Joints ◽  
Large Format ◽  
Strain Behaviour ◽  
Mechanical Fasteners ◽  
Adhesive Connections ◽  
Failure Loads ◽  
Pressure Suction

This paper compares the stress and strain behaviour of mechanical fasteners and elastic adhesive connections in timber façade applications. Two common designs with timber cladding are introduced. The traditional façade planks and multilayer large-format solid wood panels were selected. The resistance of a reference façade section with mechanical fasteners or adhesive bond to wind suction is determined according to the recommendations of European guideline ETAG 034. The pressure/suction chamber allowing hermetic closure was used. The sample deformation was measured at 15 locations, this also allowed to determine the elongation of the adhesive layer at break. The failure loads reached with the adhesive joint exceeded 20 kN/m2 in both combinations of façade cladding. On the other hand, the sample with a large-format panel and mechanical fasteners showed the lowest failure load at 12 kN/m2. The results confirmed that bonded joints are a suitable solution for large-format cladding, whereas an increase in the number of mechanical fasteners will be a more convenient solution for façade plank applications.

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