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Prestressed ConcreteConstruction:PrecastClass Instructor :

RINO D.A. FERNANDEZ

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PRECAST CONCRETE:

Prestressed Concrete

- concrete reinforced by pretensioning or

posttensioning high-strength steeltendons within their elastic limit to

actively resist a service load

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PRECAST CONCRETE:

Types of Prestressed concrete:

Pretensioned or precast concrete

Post-tensioned concrete

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PRECAST CONCRETE:

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PRECAST CONCRETE:

Precast Concrete

A concrete which has been prepared forcasting, cast and cured in a location which isnot its final destination

A concrete member/product that is cast andcured in a place other than where it is to be

installed in a structure

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PRECAST CONCRETE:

Cast in situ means cast in the actual position to

be occupied in the completed structure.

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PRECAST CONCRETE:

PRECAST CONCRETE STRUCTURES

An assemblage of precast elements which, whensuitably connected together, form a 3D

framework capable of resisting gravitation andwind loads

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PRECAST CONCRETE:

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PRECAST CONCRETE:

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PRECAST CONCRETE:

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PRECAST CONCRETE:

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PRECAST CONCRETE:

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PRECAST CONCRETE:

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PRECAST CONCRETE:

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PRECAST CONCRETE:

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PRECAST CONCRETE:

WHY CHOOSE A PRECAST STRUCTURE

Cost effective

Fast to erect

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PRECAST CONCRETE:

MATERIALS USED IN PRECAST STRUCTURES

Concrete

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PRECAST CONCRETE:

MATERIALS USED IN PRECAST STRUCTURES

Steel

Main Flexural - 16, 20, 25, 32, 40mm

Column Stirrups - 8 &10mm

Beam Stirrups - 10 & 12mm

Walls & Slabs - welded fabric

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PRECAST CONCRETE:

welded fabric

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PRECAST CONCRETE:

MATERIALS USED IN PRECAST STRUCTURES

Structural Steel

Rectangular Hollow SectionsSquare Hollow Sections

Solid Billets

ChannelsAngles

Plates, etc.

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PRECAST CONCRETE:

MATERIALS USED IN PRECAST STRUCTURES

Non-cementitious Materials

Neoprene/Rubber - bearing pads

Polysulphide Sealants - expansion joints

Epoxy Resins Mortars - shear & tension joints

Polystyrene - filler

PTFE (Teflon) - frictionless bearings

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PRECAST CONCRETE:

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PRECAST CONCRETE:

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PRECAST CONCRETE:

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PRECAST CONCRETE:

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PRECAST CONCRETE:

PRECAST CONCRETE

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PRECAST CONCRETE:

PRECAST CONCRETE

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PRECAST CONCRETE:

PRECAST CONCRETE

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Conventional Precast Panel Support Detail

PRECAST CONCRETE:

PRECAST CONCRETE

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Direct-bearing Connection

PRECAST CONCRETE:

PRECAST CONCRETE

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Direct-bearing Connection

PRECAST CONCRETE:

PRECAST CONCRETE

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Eccentric Bearing Connection

PRECAST CONCRETE:

PRECAST CONCRETE

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Bolted Connection Welded Connection

PRECAST CONCRETE:

PRECAST CONCRETE

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PRECAST CONCRETE:

PRECAST CONCRETE

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PRECAST CONCRETE:

PRECAST CONCRETE:

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PRECAST CONCRETE:

PRECAST CONCRETE:

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PRECAST CONCRETE:

PRECAST CONCRETE:

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PRECAST CONCRETE:

PRECAST CONCRETE:

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PRECAST CONCRETE:

PRECAST CONCRETE:

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PRECAST CONCRETE:

PRECAST CONCRETE:

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PRECAST CONCRETE: