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

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

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 [...]

2019-06-14T09:53:33+01:00

Reference
Runway Repair at Basel Airport 2016, Basel Airport (920)

Initial situation At Basel Airport the concrete paving at the start of the landing runway had to be replaced on a surface of approximately 70m2. Construction work had to be carried out at night to avoid disrupting normal flight operations. To allow the scheduled reopening of the runway the concrete had to reach an adequate strength at the time of acceptance - 5am. Solution and assessment For this project the rapid-hardening concrete Concretum® Q-FLASH 2/20 was used. It reaches a compressive strength of over 20 NN/mm2 just 2 hours after the start of mixing. This enabled construction work to be [...]

2019-06-14T09:53:33+01:00

Reference
Construction of a HGV lane on the A71 at Sömmerda 2015, Erfurt (772)

Initial situation Motorways and airports now carry extremely high volumes of traffic. This means there is an increasing number of transport surfaces to be repaired. Repair processes must be selected to keep closure periods of transport surfaces to a minimum. The rapid-hardening concrete Concretum® Q-FLASH 2/20 has already been used at various airports and motorways, however the installation process was restricted by the manual installation process. Thus, the testing and verification of machine-based pouring processes was a matter of prime interest. Solution and assessment The motorway station on the A71 at Sömmerda had to be constructed as quickly as [...]

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

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

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 [...]

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

Reference
Repair of expressway S1 2015, Vienna (632)

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 [...]

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

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

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 [...]

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

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

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 [...]

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

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

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 [...]

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

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

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 [...]

2019-06-14T09:53:33+01:00

Reference
Repair of runway 10/28 ZRH, 2015 (888)

Initial situation The section on runway 10/28 at Zürich Airport had several damaged slabs with an area of between 20 m2 and 90 m2. On account of the narrow repair window, it was important for concreting works to take place during the night. In a timeframe of approximately seven to eight hours, the concrete slabs were broken with heavy machinery and then reinforced and poured with rapid-hardening concrete. The objective was to be able to resume flights at the latest by 5:30am. Solution and assessment In this project, the rapid-hardening concrete, Concretum® Q-FLASH 2/20, was used which reaches a [...]

2019-06-14T09:53:33+01:00

Reference
Reconstruction of the concrete slabs on the A93 motorway, Regensburg (DE), 2014 (836)

  Initial situation Germany has an extensive motorway network with a large proportion of concrete roads. Some sections are affected by very high traffic volumes, which leads to heavy annual wear of the concrete slabs and to edge breakages. In addition, blow-ups occur, which can form in summer in some sections. The resulting damaged areas have to be repaired in order to prevent further damage and to guarantee safety on the motorway. The closure periods here have to be kept as short as possible in order to minimise traffic disruption. This requires the concrete being used to harden extremely [...]

2019-06-14T09:53:34+01:00

Reference
Repair works on runways and taxiways at Budapest Airport 2014, Hungary (822)

  Initial situation With recurring need for repair works at Budapest Airport on takeoff and landing runways, as well as taxiways, repairs were made to various small and partial surfaces on existing concrete slabs. Solution and assessment The individual repair areas reported varying volumes, ranging from approximately 40 to a maximum of 850 litres. To address this situation, the rapid-hardening drymix mortar Concretum® Q-REP G was used for smaller places, up to a maximum excavated volume of 200 litres, whilst for all larger excavated volumes, rapid-hardening concrete Concretum® Q- FLASH 2/20 was used. The drymix mortar Concretum® Q-REP G [...]

2019-06-14T09:53:33+01:00

Reference
Renovation of the Bürgertobel Viaduct, Thalwil, ZH, 2014 (765)

  Initial situation An existing SBB railway bridge had to undergo general renovation measures. In order to keep the closure period as short as possible, a concept was conceived that allowed the subsequent work to be performed rapidly. The concreted surface had to harden and dry as rapidly as possible so that the subsequent work steps could be completed on schedule and rail traffic could quickly return to its normal timetable. One track would be closed for renovation work, while the other remained open. Solution and assessment A system was selected for the renovation of the bridge, in which [...]

2019-06-14T09:53:34+01:00

Reference
Reconstruction of motorways in Greater Salzburg/AT (632)

    Initial situation Austria has an extensive motorway network that largely consists of concrete road surfaces. In many sections the traffic volume is high even outside rush hour, so closing individual lanes can lead to traffic disruption. For this reason, the reconstruction work is often undertaken in short closures at night or between rush hours. On some sections of the road, there is damage due to edge breakages that need to be repaired. Typically, the individual damaged areas are small and are spread over wide stretches. The marginal conditions make it impossible for the concrete to be transported [...]

2019-06-14T09:53:34+01:00

Reference
Reconstruction of A1 in Lower Austria/AT (607)

Initial situation Austria has an extensive motorway network that largely consists of concrete road surfaces. In many sections the traffic volume is high even outside rush hour, so closing individual lanes can lead to traffic jams. For this reason, necessary reconstruction work is often undertaken in short closures at night or between rush hours. Concrete plants are only rarely directly next to the sections being repaired, which can result in transport times of up to 60 minutes. As the fields to be reached by a mixer truck may also be up to one kilometre apart, open times of up [...]

2019-06-14T09:53:34+01:00

Reference
New construction of Strengelbacherstrasse underpass in Zofingen, 2014 (548)

Initial situation The ground level railway underpass in Strengelbacherstrasse had to be expanded to create a new underpass to considerably improve traffic movement and road safety. As a result of the heavy use of the access tracks to the Zofingen station, a construction method had to be found which would reduce the closure period to an absolute minimum. The requirement from SBB was to limit the disruption to traffic to two weekends of closure. Solution and assessment The concept developed by the engineers envisaged a cut-and-cover construction method in combination with the rapid-hardening concrete Concretum® Q-FLASH 2/20. First, large [...]

2019-06-14T09:53:34+01:00

Reference
Reconstruction of runway, Zurich Airport (416)

Initial situation As part of the runway renovations at Zurich Airport, concrete slabs with a total volume of 1,500 m3 were replaced. Conventionally, air operations would have had to be suspended for a substantially longer period because of the numerous operational and safety requirements. To minimise disruption, over the past 10 years, the relevant operational transport surfaces at Zürich Airport have been reconstructed using rapid-hardening concrete. Runway reconstruction took place in the summer and autumn months with fresh concrete temperatures from 18 °C to 33 °C and above. To ensure flexibility and not to hinder work on other parts [...]

2019-06-14T09:53:34+01:00

Reference
Reconstruction of the Zürich Airport Runway (248)

Initial situation At Zurich airport, several concrete slabs in the runways were heavily damaged and had to be reconstructed. High traffic volume during the day, constrained this reconstruction work to a very short overnight time window. Solution and assessment The rapid-hardening concrete Concretum® Q-FLASH 2/20 reaches a compressive strength of approx. 20 N/mm2 just 2 hours after adding water and despite this speed, remains workable for approx. 60 minutes. In addition, Concretum® Q-FLASH 2/20 has low shrinkage. As a result, the slabs do not bow and the risk of cracking is considerably reduced. This guarantees a long lifespan for [...]

2019-06-14T09:53:35+01:00

Reference
Solar farm, Ait Baha, Morocco (150)

Initial situation Standard solar power plants employ structures made of steel, reflectors made of glass and usually use oil as a heat carrier. These materials create safety hazards for both people and the environment. The inventor Andrea Pedretti has ended this: He creates solar collectors out of concrete and plastic film which use air as a heat carrier. As a result, he produces clean, safe and cheap - and he has built his first power station in Morocco. Solution and assessment By using Concretum® Q-FLASH 2/20 the construction process was optimised and the high-precision components were created in the [...]

2019-06-14T09:53:35+01:00

Reference
Reconstruction of stand areas and taxiways at Barcelona Airport/ES (123)

Initial situation At Barcelona airport, concrete slabs in the stand areas and taxiways were heavily damaged and needed to be reconstructed. High traffic volume during the day, meant that this reconstruction work was only possible in very short overnight time windows. Solution concept The rapid-hardening concrete, Concretum® Q-FLASH 2/20 reaches a compressive strength of > 20 N/mm2 just 2 hours after adding water and yet still remains workable for approx. 60 minutes. In addition, Concretum® Q-FLASH 2/20 has low shrinkage. As a result, cracks do not occur and the concrete is extremely durable. These qualities allowed the airport operator [...]

2019-06-14T09:53:35+01:00

Reference
Expansion of the Riedgrabenweg railway underpass, Zürich (103)

Initial situation The railway underpass in Riedgrabenweg in Zürich - Oerlikon had to be extended. Rail traffic had to be maintained throughout the entire construction period with as little disruption as possible. The project envisaged prefabrication of the bridge slab in two parts as precast elements, which were then pushed together on two weekends so that only one track had to be closed at a time during this period. Only the header beams, a type of frame wall for the bridge slabs and supports, were to be concreted on site and bonded to the bridge slab monolithically. Solution and [...]