Project Description

Life span concrete bus lane extended by 15 years

The smallest hairline cracks in a concrete road surface will eventually lead to major problems. Moisture penetrates through cracks in concrete. Because the concrete is not watertight, leaks occur that affect the reinforcement. It is important to seal cracks as soon as possible to avoid structural damage. The Province of Noord-Holland chose to solve this sustainability problem near a bus lane with Basilisk Liquid Repair System ER7.

Concrete bus lane shows cracks

The road surface of a bus lane of the High-Quality Public Transport network at Schiphol Airport shows cracks in the concrete along the entire route. The track consists of an asphalt layer with a reinforced concrete deck on top. If the concrete of this road surface is not maintained in time, the damage will increase and the repair costs will eventually skyrocket. To save costs, the Province of Noord-Holland wants to prevent greater damage to the concrete and reinforcement. Sustainability also plays a part in the consideration: prevention is also better than cure from this perspective. They chose to carry out a pilot project with Basilisk Liquid Repair System ER7. 

Results pilot project 

Good results were achieved on the bus lane during a pilot project for this new application for Basilisk. After treatment with Basilisk ER7, the water permeability of the concrete under a water pressure of 1 meter was found to have decreased by 93 percent on average. A double treatment at a water pressure of 20 centimeters gave even better results. The water permeability appeared to be (almost) completely restored after the treatment.

Self-healing concrete repair bus lane

Cost savings and sustainability 

 The results in short: 

  • Life cycle cost reduction of approximately 33% 
  • More than 90% reduction on CO2 emissions 
  • Design life extended by a minimum of 15 years 
  • Less downtime 

The application of Basilisk ER7 is durable and provides savings over traditional repair methods. The micro-organisms, which are applied to the concrete via liquid, find their way into the smallest hairline cracks and convert the food sources present into limestone. This limestone fills the cracks and thus repairs the concrete structure in an autonomous way. 

Because the application of this product is quick and easy, downtime is kept to a minimum. In addition, approximately 33% are saved on the costs of the entire life cycle compared to alternative repair methods. The CO2 emissions when using Basilisk products are 90% less compared to the available alternatives. 

ER7 Application on concrete crack
ER7 Application on concrete

Concrete resistant against freeze and thaw 

Another advantage of Basilisk ER7 is the increased freeze/thaw resistance of the surface. After two treatments, it is on average 57 percent higher; in exceptional cases even 79 percent. This leads to a demonstrably longer life of at least 15 years. 

Want to know how much can be saved on your project with Basilisk ER7? Contact us, we will gladly make some calculations for you. 

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Project data
Name Pilot project bus lane Hoogwaardig Openbaar Vervoer Schiphol 
Year 2020-2021 
Object Asphalt layer with a reinforced concrete deck on top 
Location Schiphol, Netherlands 
Clients & partners Provincie Noord-Holland 
Contractor Combination MGZ (Mobilis, Van Gelder en De Jong Zuurmond)  
Concrete repair company Mobilis 
Product Basilisk Liquid Repair System ER7 
Project size Size 200 m² concrete surface, 100 m crack length 
Cost savings  33%
CO2 reduction 90%
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