BASF SE said that its MasterEase products from Master Builders Solutions proved to be the perfect superplasticizer for sprayed concrete, during the construction of the “Tunnel de Champel” in Geneva.
MasterEase reduces the viscosity of the concrete, making it less sticky and therefore easier to pump and apply. This is a significant advantage for sprayed concrete applications. MasterEase UG 3904 increases the workability time and, when applied, the concrete hardens more evenly on the tunnel wall.
With the use of MasterEase, the Swiss tunnelling contractor Marti Tunnelbau AG was able to switch to a more economical cement for the construction of the Tunnel de Champel.
Initially, the change in cement presented some challenges: “The combination of the new cement and the old superplasticizer created problems due to the reduced open time,” said Nicole Kolbener, construction manager at Marti Tunnelbau. “After only one hour, the flowability was no longer sufficient.”
Rene Bolliger, head of underground construction at BASF for Germany, Austria, and Switzerland recommended to the tunnelling specialist and the cement supplier Holcim that the MasterEase UG 3904 superplasticizer should be added.
BASF SE said that its MasterEase products from Master Builders Solutions proved to be the perfect superplasticizer for sprayed concrete, during the construction of the “Tunnel de Champel” in Geneva.
MasterEase reduces the viscosity of the concrete, making it less sticky and therefore easier to pump and apply. This is a significant advantage for sprayed concrete applications. MasterEase UG 3904 increases the workability time and, when applied, the concrete hardens more evenly on the tunnel wall.
With the use of MasterEase, the Swiss tunnelling contractor Marti Tunnelbau AG was able to switch to a more economical cement for the construction of the Tunnel de Champel.
Initially, the change in cement presented some challenges: “The combination of the new cement and the old superplasticizer created problems due to the reduced open time,” said Nicole Kolbener, construction manager at Marti Tunnelbau. “After only one hour, the flowability was no longer sufficient.”
Rene Bolliger, head of underground construction at BASF for Germany, Austria, and Switzerland recommended to the tunnelling specialist and the cement supplier Holcim that the MasterEase UG 3904 superplasticizer should be added.
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