Ertugrul Gazi Mah. Sehitler Cad. PRESTRESSED CONCRETE ... · PDF file Prestressing concrete...

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Transcript of Ertugrul Gazi Mah. Sehitler Cad. PRESTRESSED CONCRETE ... · PDF file Prestressing concrete...

  • Ertugrul Gazi Mah. Sehitler Cad. No: 2 Kartepe, Kocaeli 41180 TURKEY

    Tel: +90 (262) 371 12 80 Fax: +90 (262) 371 51 15

    www.celikhalat.com.tr [email protected]

    OUR RED LINE is quality

    P R E S T R E S S E D C O N C R E T E S T R A N D

  • MEASURES FOR STORAGE

    Some of the measures have to be taken during the use of

    prestressing concrete steel:

    • Prestressing concrete steel is sensitive against intensive

    heat sources. Internal structure and mechanical features of

    steel may be changed if it is exposed to intensive heating.

    • Loading and discharging have to be made in minimum

    amounts and corrosion and pressure have to be avoided in

    order not to change mechanical features.

    • Coils have to be stowed over ground level and they have

    to be covered in a way that they allow a good air circulation

    in order to avoid condensation.

    WHAT IS PRESTRESSING?

    Prestressing is to apply constant stress artificially to

    structural components before applying external loads.

    For the prestressing concrete wires and strands in

    various dimensions, types and resistances, which are

    produced exclusively, are used.

    Prestressing concrete steel elements are produced by

    taking stress from high carbon special wire rods with

    vanadium alloys after a distinct load and a regular

    patenting treatment.

    In prestressed concrete structures the prestressing

    applied initially is decreasing in time due to warping and

    creep of concrete and relaxation of prestressing steels.

    Therefore, the characteristics of the steel defined as steel

    relaxation under constant length or loss of stress is one

    of the important parameters taking into consideration in

    designing of prestressed concrete structures.

    Advantages of the products with lower relaxation:

    • More tensile and yield strenghts.

    • Super durability against fatigue and corrosion.

    • Consistent load elongation relation.

    • Super straightening feature.

    QUALITY

    Our products are tested under the latest technology standards by our highly qualified and experienced experts to provide durability, elongation and relaxation features according to the parameters of international standards.

    PC STRAND

    Çelik Halat ve Tel Sanayi A.Ş. started

    producing PC Strand in 1986 as the first

    mover in Turkey. With new projects and

    investments; our company intends to extend

    its domestic market leadership to overseas.

    PC strand with 7 strands that are used in

    the areas such as bridge girder production,

    prefabricated construction elements,

    ground and mine anchorages, nuclear

    power stations, silo constructions, housing

    constructions are produced according to the

    ASTM, BS, EN, TSE ve JIS standards.

    Primary advantages provided by PC Strand:

    • Having high tensile strength.

    • Potential great prestressing in small edges.

    • Less need for anchorage and application

    labor.

    (mm) (in) (Mpa) (Grade) (mm²) (in²) (g/m) (lb/1000ft) (kN) (lbf) (kN) (lbf) 1725 250 51.61 0.080 405 272 89.0 20000 80.1 18000

    1860 270 54.84 0.085 432 290 102.3 23000 92.1 20700

    1725 250 92.90 0.144 730 490 160.1 36000 144.1 32400

    1860 270 98.71 0.153 775 520 183.7 41300 165.3 37170

    1725 250 139.35 0.216 1094 737 240.2 54000 216.2 48600

    1860 270 140.00 0.217 1102 740 260.7 58600 234.6 52740

    Diameter Tensile Strength Cross Sectional Area Mass Per Metre Minimum breaking

    Strength Minimum load at 1%

    Extension

    9.53 mm 3/8"

    12.70 mm 1/2"

    15.24 mm 3/5"

    ASTM A416 - SEVEN-WIRE UNCOATED STRAND - LRPC   [LOW RELAXATION]