Surfaces and Materials

Surface preparation and pretreatment are essentially necessary for the durabil­ity of bonded joints. However, in civil engineering, which shows considerable tolerance and surface contamination compared to the automotive or aviation industry, the effort, extent, and benefit of preparation methods must be well

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TABLE 1—Systematic approach within the INNOGLASTproject [5].

 

I. Determination of requirements for the adhesive joint

 

(y) Shear flow (SJj) Elastic-plastic slip (t) Temperature

 

o,

 

II. Design of the joining geometry

 

IV. Determination of mechanical values by standardized test

 

***» ebb**

 

Tension tests

 

Block shear tests

 

Dynamic mechanical analysis

 

V. Development of small scale test specimen (push out specimen) with

 

significance concerning I.

 

Surfaces and MaterialsSurfaces and MaterialsSurfaces and Materials

TABLE 1—Continued

VI. Determination of tensile and shear capacity by means of small scale

Surfaces and Materials Surfaces and Materials

specimen

VII.

Surfaces and Materials

Transfer to real structural elements

VIII. Derivation of design recommendations

balanced. Therefore, only associated adhesive-primer systems identified by the producers were used in order to avoid additional disturbing factors such as the general applicability and compatibility of primer and surface treatments.

In the case of adhesive with a low or medium shear modulus, carbon steel grade S235 was applied for the flanges, and for stiff epoxy resins steel grade S355 was used. The glass webs for small-scale tests consisted of toughened

Copyright by ASTM Int’l (all rights reserved); Tue May 6 12:07:08 EDT 2014

Downloaded/printed by

Rochester Institute Of Technology pursuant to License Agreement. No further reproductions authorized.

Подпись: Copyright by ASTM Int'l (all rights reserved); Tue May 6 12:07:08 EDT 2014 Downloaded/printed by Rochester Institute Of Technology pursuant to License Agreement. No further reproductions authorized.

Structure

 

Подпись: FELDMANN ETAL., doi:10.1520/JAI104079 31

Cross section

 

Detail

 

Component

 

FIG. 1—Classification of building structures [8].

 

Surfaces and Materials

safety glass, and for component large-scale tests it consisted of laminated safety glass due to safety aspects that will be demanded by building authorities. All steel surfaces were sandblasted to cleanness 2 1/2 [12-14]; glass surfaces were wiped, degreased, furnished with primer, evaporated, and bonded directly.