Reference projects
Spoil management
B+ G disposes of a 20 years experience in the fields of spoil management and concrete technology. B+ G was or is involved in the following large spoil management projects:
- AlpTransit Lötschberg, Northern and southern section (1996 - 2003): preliminary clarifications, SM concept, call for tender, raw material and aggregate controls, planning assistance for SM and concrete technology
- AlpTransit Gotthard, Section Erstfeld, Amsteg, Sedrun, Faido, Bodio (1994 - 2014): preliminary clarifications, SM concept, call for tender, raw material and aggregate controls, planning assistance for SM and concrete technology
- AlpTransit Ceneri, (1999 - 2016): preliminary clarifications, SM concept, call for tender, raw material and aggregate controls, planning assistance for SM and concrete technology
- Koralmbahn, (2000 - 2002): preliminary clarifications, planning assistance for SM
- Nant de Drance, (pumped storege plant 2006-2007): preliminary clarifications, SM concept
- Project Linthal 2015, (pumped storege plant, from 2007): preliminary clarifications, SM concept, call for tender, raw material and aggregate controls, planning assistance for SM and concrete technology
- Lyon-Turin Ferroviaire, (from 2005): preliminary clarifications, planning assistance for SM and concrte technology
- Barage Les Toules, (dam strengthening of dam, 2009): raw material and aggregate technology, planning assistance for SM
- NAGRA, National cooperative for the disposal of radioactive waste, (from 2010): preliminary clarifications, SM concept
- DISS. ETHZ Nr. 19451, Christoph Bärtschi (2011); referee: Kieselkalke der Schweiz: Charakterisierung eine Rohstoffs aus geologischer, petrographischer, wirtschaftlicher und umweltrelevanter Sicht.
Concrete technology
C. Thalmann works as concrete expert (planning assistance) for the following large construction sites:
- AlpTransit Lötschberg
- AlpTransit Gotthard
- AlpTransit Ceneri
- Project Linthal 2015
B+ G advises numerous gravel and concrete plants relative to concrete and aggregates.
Alkali Aggregate Reaction (AAR)
C. Thalmann was part of two AAR working groups that published the followinf fact sheets:
- SIA-Merkblatt 2042: "Vorbeugung von Schäden durch die Alkali-Aggregat-Reaktion (AAR) bei Betonbauten"
- cemsuisse (2005): "Alkali Aggregate Reaction (AAR) in Switzerland"
B+ G advises project managers of national roads and undergraound engineering agencies about concrete technology and AAR resistant concrete:
- Oberingenieurkreis I, (from 1999) canton of Bern: AAR resistant concrete
- Nationalstrass A9, (from 2008) canton of Valais: AAR resistant concrete and concrete technology
- Abteilung Nationalstrassen (from 2004) canton of Bern: AAR resistant concrete
Maintenance and follow-up of buildings
B+ G carries out condition analyses of numerous different concrete structures and buildings with competent partners using different non-destructive meausurements techniques such as residual potential measurement. These analyses are carried in cooperation with our partner laboratory Transgeo AG.
B+ G and OXAND SA also developped a new, efficient and non-destructive testing procedure based on ultrasonic waves to measure the white noise of retaining walls and thus to evaluate their integrity.
These results can be reviwed and validated through drill core analyses.
B+ G participated to the following projects:
- Oberingenieurkreis I, (from 1999) canton of Bern: Residual potential measurements, condition analyses, non-destructive measurements of 231 reatining wall elements (total length: 1'525 m), action plan, rehabilitation concept
- Abteilung Nationalstrassen (from 2004) canton of Bern: Diverse concrete structures such as bridge elements and retaining walls: Residual potential measurements, condition analyses
- Atel Rete SA (2005): power pylons at Laco di Sta-Maria (Lukmanier pass): condition analyses, concrete concept and planning assistance
Aktuell / Actuel / Actual
TELT: Tunnel Euralpin Lyon-Turin (84km Länge)
Since 2021 B+ G supports a consortium for the tender of the material management lot. Based on our experience, the raw material is continuously tested in the construction site's own laboratory.
Concrete tests with sulphate-containing aggregates (produced from tunnel excavation) and special binders were carried out in the Modane intermediate attack on 7 April 2016.
Among other things, the sulphate resistance is to be investigated.
Dam Spitallam KWO
The new Spitallam dam in the Bernese Oberland will require around 200,000m3 of concrete. The mass concrete consists of a maximum grain size of 125mm! A gravel plant was built for the production of the aggregates. B+ G supports the client KWO in the quality of raw materials, aggregates and concrete.
B+ G Betontechnologie +
Materialbewirtschaftung AG
Dorfstrasse 10
CH-3073 Gümligen
fon: +41 (0)31 960 43 28
fax: +41 (0)31 960 43 31
mail: info@BplusG.ch
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