• Prestressed Concrete Structures

    Testing High Strength Prestressed Concrete Cubes

    by  • April 23, 2014 • concrete, Prestressed Concrete Structures, Testing • 0 Comments

    High strength prestressed concrete cube tests guidelines are guidelines prescribed in the Indian standard code IS: 1343-1980 with respect to quality of materials used in prestressed concrete. The minimum 28 day compressive strength of concrete cubes of 15 cm size, prescribed in the Indian standard code IS: 1343-1980, is 40 N/mm2 for pre-tensioned concrete and 30 N/mm2 for post-tensioned concrete. The...

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    Pre-tensioning Systems and Devices

    by  • January 5, 2011 • Prestressed Concrete Structures, Subjects • 1 Comment

    Pre-tensioning Systems and Devices  section covers the following topics. • Introduction • Stages of Pre-tensioning • Advantages of Pre-tensioning • Disadvantages of Pre-tensioning • Devices • Manufacturing of Pre-tensioned Railway Sleepers 1.3.1 Introduction Prestressing systems have developed over the years and various companies have patented their products. Detailed information of the systems is given...

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    Advantages and Types of Prestressing

    by  • January 5, 2011 • Prestressed Concrete Structures, Subjects • 0 Comments

    Advantages and Types of Prestressing This section covers the following topics. • Definitions • Advantages of Prestressing • Limitations of Prestressing • Types of Prestressing 1.2.1 Definitions The terms commonly used in prestressed concrete are explained. The terms are placed in groups as per usage. Forms of Prestressing Steel Wires  : Prestressing wire is...

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    Introduction of Prestressed Concrete Structures

    by  • January 5, 2011 • Prestressed Concrete Structures, Subjects • 3 Comments

    1.1 Introduction This section covers the following topics. • Basic Concept • Early Attempts of Prestressing • Brief History • Development of Building Materials 1.1.1 Basic Concept A prestressed concrete structure is different from a conventional reinforced concrete structure due to the application of an initial load on the structure prior to its use....

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    Manufacturing of Pre-tensioned Railway Sleepers

    by  • December 29, 2010 • Prestressed Concrete Structures, Subjects • 1 Comment

    Manufacturing of Pre-tensioned Railway Sleepers The following photos show the sequence of manufacturing of pre-tensioned railway sleepers (Courtesy: The Concrete Products and Construction Company, COPCO, Chennai). The steel strands are stretched in a stress bench that can be moved on rollers. The stress bench can hold four moulds in a line. The anchoring device...

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