Shotcrete accelerator from MC meets site requirements in full

• Name

  Tunnel construction in Bosnia-Herzegovina

• Country

  Bosnia-Herzegovina, 2024

• Fields of Expertise

  Tunnelling

• Categories

  Tunnelling Systems

• Products

  MC-Montan Shotcrete HA 01

The Doboj motorway bypass connects the northern end of the motorway in the Federation of Bosnia and Herzegovina with the Johovac-Rudanka motorway section currently under construction. This section runs west of the town of Doboj and is of strategic importance for regional transport links. Autoputevi Republika Srpska contracted our client Integral Inženjering a.d. Laktaši to carry out the infrastructure project, which cost around €110 million. The project was supervised by IRD Engineering from Italy.

Montan Shotcrete HA 01 HR gives best results

The construction of the two Putnikovo Brdo tunnels required a special solution. One of the main challenges of the project was the lack of stability of the ground through which the tunnels were being dug. Initially, the tunnel was in danger of collapsing in places. The search for a suitable approach was a lengthy process, which eventually led to the MC team in Bosnia and Herzegovina being able to carry out on-site tests and prove the quality of Montan Shotcrete HA 01 HR accelerator. This was crucial as the project stakeholders had been working with an established competitor for years. Once MC was involved, the work went smoothly. Montan Shotcrete HA 01 HR was the only accelerator that could meet the early strength requirements of the concrete. After months of testing, MC was left as the only supplier able to offer a satisfactory solution.

Considerable time and cost savings

Montan Shotcrete HA 01 HR is a versatile hardening accelerator for shotcrete used in wet and dry spraying for tunnel and mountain stabilisation, temporary rock stabilisation and slope stabilisation. It offers high early strength and fast construction progress, allowing layer thicknesses of 15 to 25 cm per application, and thus saving time and money. In the testing phase, even layer thicknesses of up to 50 cm were no problem and performed well. Montan Shotcrete HA 01 HR is also characterised by a lower dosage than competitive products, which allows further significant cost savings.

 

The completion of the Doboj motorway bypass is an important step towards improving the infrastructure in Bosnia and Herzegovina. With the successful use of Montan Shotcrete HA 01 HR, MC Bosnia-Herzegovina has once again demonstrated its ability to provide tailor-made solutions for challenging construction projects and to contribute to the success of major infrastructure undertakings.