Glass Reflections
Cambridge 7th to 9th September



Presenting Author:
Telesilla Bristogianni
<T.Bristogianni@tudelft.nl>

article posted 10 Mar 2015

Telesilla Bristogianni

Bristogianni Telesilla is a PhD researcher in Civil Engineering at the Glass and Transparency Lab of TU Delft since 2014, focusing on structural cast-glass elements. She has a background in architecture and building technology, with a specialization in performance driven design and the development of novel building components with the aid of parametric models and digital simulations, and supported by material research and the production of physical prototypes.









Maximizing the Transparency of a Structural Glass Masonry Wall
Faidra Oikonomopoulou1, Telesilla Bristogianni2*,
Fred A. Veer3, Rob Nijsse4

An adhesively bonded glass masonry system has been developed at the TU Delft Glass and Transparency Lab for the Crystal House fašade, a completely transparent reproduction of the previous, 19th century elevation in the historic centre of Amsterdam, envisioned by MVRDV. In this paper, the steps followed towards the materialization of the design and the maximizing of the transparency level of both cast glass blocks and adhesive layer will be presented.





Regarding the glass blocks, the optimization of the material's composition and production technique, as well as the choice of texture and geometry played a key role in the visual result. The absence of any metal substructure notably increased the overall transparency of the fašade. However, it called for a transparent adhesive that could lead to a self-supportive wall meeting the given structural requirements; at the same time it should result into minimum visual distortion.



The family of Delo Photobond adhesives was chosen as it fulfilled all the prerequisites. In particular, the type applied for the bonding of the blocks is a clear adhesive with similar index of refraction to the glass used. The ageing of the adhesive under sun exposure was also considered, to avoid eventual undesirable colorations.


Moreover, the specific adhesive ensured the monolithical behaviour of the bonded masonry with satisfactory flexural strength values. This adhesive obtains its maximum strength when applied in a layer of 0.3 mm, thus very strict tolerances in the brick sizes were necessary.

The application of the adhesive with special moulds and in relation to the acquired minimum tolerances of the glass blocks, led to the homogeneous distribution of the adhesive and the elimination of visible air gaps. Taking all the above measures into account, one can see through the structural 210 mm thick glass wall with minimum visual distortions.


Institutions:

1,3,4 TU Delft, Faculty of Architecture, Department of Architectural Engineering + Technology

2*,4 TU Delft, Civil Engineering and Geosciences, Structural Engineering Department


Email Addresses:

1 F.Oikonomopoulou@tudelft.nl,

2*T.Bristogianni@tudelft.nl

3 F.A.Veer@tudelft.nl,

4 R.Nijsse@tudelft.nl