Post-Tensioning

Post-tensioning of bridges

The MK4 post-tensioning system proposed, includes a gear range of anchorages, accessories and the necessary equipment to respond to the technical requirements for the construction of bridges and other structures.

The design and calculation of all the components were performed according to the new European code ETAG-013, which verification is an obligation in all post tensioning structures built in the European Union.

As application, we are providing post-tensioning for any structure as bridges, buildings, tanks of liquefied gas LNG, silos, covertures, communication towers, nuclear power stations, suspended structures, etc. in either internal or external post-tensioning.

The services provided by MK4 include the following aspects:

Technical assistance in all the phases of the project from the design to the final execution.
A large range of live end and dead end anchorages and couplers, being always ready for any development or change according to the specifics needs of the project.
The designed system was successfully tested according to the new European standard ETAG-013 for post-tensioning systems.

The possibility to use metallic and PE/PP ducts depending on the project specifications
Automatic and lightweight stressing equipment.
Study of alternative design or construction method as an improvement for the optimum solution for every project.
LN6 tanks
Wind mills

ALBA & NUWAIDRAT

ALBA & NUWAIDRAT

ALBA & NUWAIDRAT

CORRIDOR X – DEMIR KAPIJA-SMOKVICA – MACEDONIA

CORRIDOR X – DEMIR KAPIJA-SMOKVICA – MACEDONIA 4

CORRIDOR X – DEMIR KAPIJA-SMOKVICA – MACEDONIA 3

CORRIDOR X – DEMIR KAPIJA-SMOKVICA – MACEDONIA 2

ALBA _ NUWAIDRAT INTERCHANGE – BAHREIN

VIÑAO VIADUCT AVE GALICIA -SPAIN

RICOBAYO – ESPAÑA

RA 184 KUWAIT

RA 184 KUWAIT 2

RA 184 3

QATAR 20140605_0959182-700X450

QATAR 20130623_0522322-700X450

QATAR 20130613_0647362-700X450

QATAR 151215_P010_A6- IC30 BRIDGES AERIAL VIEW.

NISAVA III,IV GIRDERS – SERBIA

ZIGANA TUNNEL BALANCED CANTILEVER BRIDGES – TURKIYE

DUKHAN ROAD QATAR 3

ANKARA-SIVAS-YHT-PROJESI-VIYADUK-3_KOLAJ1

ANKARA-SIVAS HSR PROJECT VIADUCT – 3 – TURKIYE

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RIZE – ARTVIN AIRPORT BRIDGES – TURKIYE

ANKARA-SIVAS-YHT-PROJESI-VIYADUK-16_KOLAJ1

ANKARA-SIVAS HSR PROJECT VIADUCT – 16 – TURKIYE

DENIZLI MARKETPLACE CROSSROAD BRIDGES – TURKIYE

MERSIN SEAPORT CROSSROAD BRIDGES – TURKIYE

NORTH MARMARA MOTORWAY BALANCED CANTILEVER BRIDGES – TURKIYE

ZIGANA TUNNEL BALANCED CANTILEVER BRIDGES – TURKIYE

SAFEEN U TURN BRIDGE – IRAQ

ALBA & NUWAIDRAT

Post-tensioning in buildings

The use of post tensioning systems in buildings offers numerous advantages and is increasingly being used in this industry

BLACKFRIARS LONDON

Unbonded monostrand systems

MK4 can offer unbonded monostrand systems (greased and PE-coated stand). The MK4 unbonded mono-strand system uses 0,6” and 0,62” diameter strand of 1860 MPa capacity.

Multi-strand bonded systems

Multi-strand bonded systems with either round or flat corrugated duct is also provided as an alternative for the construction of slabs in buildings when this type of system is required.

MK4 also offers complete packages including alternative design of the slabs in addition to the conventional incorporation of our MK4 tendons (supply, installation and stressing).

The advantages of PT in buildings can be summarized as follows:

Reduced quantity of reinforcement for passive bending and shear.
Larger column free space.
Thinner slabs and reduced volume of concrete.
Speeding up the construction cycle.
Reduced construction joints.
Crack-free slabs.
Minimised foundations.
Reduced maintenance costs.

FOUR SEASSONS – BAHREIN

Repair, maintenance and surveillance of structures, especially old building and monuments are additional activities in which we are presently becoming very active.

ANTWERP STATION – BELGIUM

CORRIDOR-X-DEMIR-KAPIJA-SMOKVICA-MACEDONIA-4-394x303

BLACKFRIARS LONDON 2

BLACKFRIARS LONDON

DUBAI MALL – UAE 1

DUBAI MALL 2- UAE

FOUR SEASSONS – BAHREIN

HOSPITAL KNOKKE – BELGIUM

KNOKKE – BELGIUM

SHARD OF GLASS – LONDON

TORNADO – BAHREIN

AGBAR TOWER – BARCELONA

ATATURK OPERA & CONGRESS CENTER – TURKIYE

BATUMI METROCITY HOTEL – GEORGIA

PRESIDENTIAL PALACE CONGRESS CENTER – TURKIYE

NISANTASI KORU PROJECT – TURKIYE

EMAAR SQUARE – TURKIYE

GAZIANTEP AIRPORT – TURKIYE

HAVELSAN TECHNOLOGY CAMPUS – TURKIYE

MARINERA CESME – TURKIYE

MERKEZ ANKARA – TURKIYE

NEF KANDILLI – TURKIYE

MIDDLE EAST TECHNICAL UNIVERSITY TECHNOPOLE BUILDING – TURKIYE

QUATOUR BRUSSELS – BELGIUM

KUZU EFFECT SHOPPING MALL & RESIDENCES – TURKIYE

HILLTOWN SHOPPING CENTER – TURKIYE

YDA CENTER – TURKIYE

SUPREME COURT – TURKIYE

YDA CENTER – TURKIYE

MELIKE HATUN MOSQUE – TURKIYE

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YILDIRIM TOWER – TURKIYE

The crucial role of post-tensioning in structures

In these structures, post-tensioning concrete plays a very crucial role proven that it is an efficient, economical and fast way of construction. In the same way, the structural stability, durability and long term performance of this kind of structures is strengthen when using a post-tensioning approach such as MK4 system.

Post-tensioning in structures

Tanks (food tanks, LNG tanks, Silos), Water Reservoirs and Wind Towers are also an important part of MK4 scope of projects

TETUAN SILO

The services provided by MK4 include the following aspects:

Regarding LNG projects, MK4 system owns ETA approval for cryogenic and LNG tanks and has also carried out several specific test under cryogenic conditions in independent laboratories complying with the most stringent international standards. Vertical tendons and horizontal tendons are normally used.

The use of precast or in-situ post-tensioned concrete instead of steel is becoming more and more common in windfarms.

This is mainly because it offers very important advantages: higher energy production thanks to higher pylons, lower transportation costs, construction flexibility, smaller maintenance costs.

Our Wind Post-Tensioned concrete Towers have been specifically certified by DNV/GLL for one of our wind farms in Brazil. Towers were almost 120 m height.