rapid hardening

/rapid hardening

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Runway reconstruction Sabiha Gökçen Airport (SAW), 2018

2019-07-02T13:52:30+01:00

Initial situation Istanbul-Sabiha Gökçen Airport (SAW) is Istanbul's second major airport and handles over 900 aircraft movements each day and 31.4 million passengers annually (2017) with just a single runway. Due to the success of the airport and its steadily increasing traffic over recent decades the runway was in poor condition. Especially, the center portion in the touchdown areas showed substantial surface damages and was in need of renewal. However, construction on this intensively used air traffic surface is only possible during the night when operations are halted. Solution and assessment From March to September 2018, a total of [...]

Reference
Taxiway repair at Brussels-Zaventem Airport (BRU), 2019 (1050)

2019-08-16T09:31:09+01:00

Initial situation Brussels-Zaventem Airport is the largest airport in Belgium with over 25 mio passengers and is additionally also used for military operations. The apron area was originally constructed as a durable concrete surface but developed damages in the highly frequented areas after many years of use. Some of these areas were repaired using asphalt patches. One of these damaged areas was on a taxiway connecting 12 airplane stands with the runway. The asphalt patches quickly developed cracks and depressions due to creep and tire tracks from the weight of the aircraft. Therefore, the patches needed replacement with a [...]

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Airfield repair at Václav Havel Airport Prague (PRG), 2017 (1013)

2019-08-15T14:03:11+01:00

Initial situation With over 15 million passengers each year, Václav Havel Airport Prague is one of Europe’s busiest airports and at the same time, it has a relatively small size. This makes airside areas very valuable for smooth operations and closure times problematic. In order to reduce possible closures from multiple weeks to only hours or days, the airport operators wanted to try out a new solution with Concretum® rapid-hardening concrete. For the first time in the Czech Republic, two damaged slabs of totally 16 m3 were replaced at the airplane stands. Solution and assessment The Václav Havel Airport [...]

Reference
Repair of stands at Charles de Gaulle (CDG), 2017 (1001)

2019-06-14T09:53:31+01:00

Initial situation On Paris’ largest airport Charles de Gaulle (CDG) with more than 65 mio passengers per year each and every pavement area is continuously used by airplane traffic. Additionally, construction works and temporarily diverted taxiways constrain operations. There is hardly any time or space for repair and maintenance of deteriorated areas of the concrete pavement. Solution and assessment Thanks to the highly flexible application of Concretum rapid-hardening concrete Q-FLASH 2/20, concrete bays can be reconstructed as a whole or in parts. Adjacent areas are not affected and can be used for traffic without restrictions. The deteriorated old concrete is [...]

Reference
Repair at India aircraft stand areas ZRH 2015, Zurich Airport (896)

2019-06-14T09:53:32+01:00

Initial situation At Zurich Airport five concrete slabs in a row had to be replaced on the taxiways between the runway and the India laircraft stands. As is customary for airport works, the renewal works had to take place at night to avoid the disruption of flight operations. Solution and assessment This was the first time in Switzerland that Concretum® Q-FLASH 2/20 was poured with a slipform paver.
The paver has an adequate paving width which allowed the 7 m wide and 35 m long surface unit to be poured in one piece. This degree of automation facilitates an increased [...]

Reference
Repair of concrete surfaces at Frankfurt Airport, Frankfurt am Main, 2014 (772)

2019-06-14T09:53:32+01:00

Initial situation During repairs at Frankfurt Airport, the concrete surface of a roadway used by vehicles and crossed by aircrafts had to be renovated. The area to be renovated was located at the heart of the Airport at Terminal 1, between piers A and B. For this reason, it was very difficult to set up a barrier for the construction works. Only very short windows were available for repairs at the airport, because of the need to maintain daily operations. Repair works could only be carried out therefore, during night closures between 23:00 and 05:00.  Since vehicles would have [...]

Reference
Repair to taxiways ZRH 2015, Zurich Airport (896)

2019-06-14T09:53:32+01:00

Initial situation At Zürich Airport, a number of slabs of the taxiways showed signs of fatigue as well as damage requiring repair. In order to minimise closure periods, the repair works were carried out during a nighttime slot. In this way the available window was severely restricted. In addition, the exceptionally hot summer in Zürich presented a further challenge to concrete production. Solution and assessment For this project, the rapid-hardening concrete, Concretum® Q-FLASH 2/20, was used. It reaches a compressive strength of approximately 20 N/mm2 just 2 hours after the start of mixing. Adapting the open time to the [...]

Reference
World Premier: Rapid-hardening concrete with a paver on the A2 at Feldkirchen 2015, Graz/AT (632)

2019-06-14T09:53:32+01:00

Initial situation On the A2 in Austria at Feldkirchen (Graz/AT) a 50m stretch of the right-hand lane had to be repaired. To minimise disruption of traffic on this important stretch the lane could only be closed at night. Solution and assessment For this project the rapid-hardening concrete Concretum® Q-FLASH 2/20 was used. It reaches a compressive strength of approximately  20 N/mm2 just 2 hours after the start of mixing. As the open time and consistency were adapted to the basic conditions (temperature, approach access, time and type of pouring) it was possible to lay the rapid-hardening concrete with a slipform [...]

Reference
Repair of expressway S1 2015, Vienna (632)

2019-06-14T09:53:32+01:00

Initial situation There was evidence of damage to concrete slabs on expressway S1 near Vienna (e.g. cracks and broken edges) requiring repair. To minimise traffic disruption due to repairs, the works were carried out at night using rapid-hardening concrete. Solution and assessment The rapid-hardening concrete Concretum® Q-FLASH 2/20 was used for this project. It reaches a compressive strength of over 20 N/mm2just 2 hours after the start of mixing. This enabled the construction work to be completed within this very limited time frame. The concrete was produced in a nearby concrete plant and then transported to the site with a [...]

Reference
Repair of taxiways with a slipform paver 2015, Vienna Airport (632)

2019-06-14T09:53:32+01:00

Initial situation In the parking areas at Vienna Airport the concrete paving had to be replaced on a surface with a width of approximately 7m and a length of approximately 30m. As the area was an important intersection, the closure periods had to be kept to a minimum. To carry out the construction process as quickly as possible the concrete was installed using a slipform paver. Solution and assessment For this project the rapid-hardening concrete Concretum® Q-FLASH 2/20 was used. It reaches a compressive strength of approximately 20 N/mm2 just 2 hours after the start of mixing. As the open [...]