LOSSESS IN PRESTRESS OF PRESTRESSED CONCRETE
LOSSESS IN PRESTRESS OF PRESTRESSED CONCRETE The force which is used to stretch the wire to the required length must be available all the time as prestressing force if the steel is to be prevented from...
View ArticlePRE-TENSIONING AND POST-TENSIONING
PRE-TENSIONING AND POST-TENSIONING IN PRESTRESSED CONCRETE DESIGN The prestress in a structure is influenced by either of the two processes: Pre-tensioning, and Post-tensioning Pre-tensioning can be...
View ArticlePRESTRESSING SYSTEMS AND ANCHORAGES
In concrete structures, prestress is introduced by stretching steel wire and anchoring them against concrete. Therefore, the prestressing systems should comprise essentially a method of stretching the...
View ArticlePRESTRESSED CONCRETE- MERITS AND DEMERITS
Prestressed concrete has the following merits: Since the technique of prestressing eliminates cracking of concrete under all stage of loading, the entire section of the structures takes part in...
View ArticleClassification of Prestressed Concrete
There are many ways of classifying pre-stress concrete members based of the member of design, construction and application of pre-stress, some of them are as follows:- External or internal...
View ArticleMaterials for Prestressed Concrete
High strength concrete mix: Pre-stressed concrete requires concrete which has a high compressive strength, with comparatively higher tensile strength. Low shrinkage, minimum creep characteristics and a...
View ArticleSPECIFICATIONS OF PRESTRESSING STEEL
Specification of Prestressing Steel For prestressed concrete members, the high-tensile steel, used generally, consists of wires, bars or strands. The high tensile strength of steel is generally...
View ArticleMIX DESIGN OF HIGH STRENGTH CONCRETE
The properties of a high-strength concrete-mix with a compressive strength of more than 40 MPa is greatly influenced by the properties of aggregates in addition to that of the water-cement ratio. To...
View ArticleMEASURING LOSS OF PRESTRESS IN PRESTRESSED CONCRETE
Instruments for measuring loss of prestress in prestressed concrete: The initial pre-stressing force applied to the concrete element reduces due to elastic shortening of the concrete,...
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