concrete condensed1 cement production, composition & types
TRANSCRIPT
Concrete Condensed 1
Cement
Production, Composition &
Types
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Terminology
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Raw Materials in Cement
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Production of Cement
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Production of Cement
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Compounds in Cement
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Compound Proportions
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Cement Types
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Cement Types & Compositions
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Composition of Concrete
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Strength Concrete
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Weight of Concrete
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Behavior
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Strength Development
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Water to Cement Ratio (W/C Ratio)
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Paste- Aggregate Bond
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Curing
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Hydration
Hydration is the general term used to describe the chemical
reaction that takes place between cement powder and
water.
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Hydration Process
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Hydration of Cement
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Hydration Process
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Hydration of C3S
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Crystal formation of Cement
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Fresh to Hardened State
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Phases
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Paste Phase
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Paste Phase
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Aggregate Phase
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Admixtures
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Placing Fresh Concrete
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Strength Development of Time
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Compression Testing Core Sample
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Sulfate Attack
Monosuloaluminate + Water + Sulfate = Ettringite
=
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Examples of Sulfate Attack
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Advantages of Concrete
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Disadvantages of Concrete
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Air in ConcreteEntrapped & Entrained
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Sources of Air
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Entrapped Air
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Entrained Air
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Entrained Air
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Purpose for Entrained Air
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Entrained Air Examples
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Air-Entrained Admixtures
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Air Void System
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Air Void System
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Air Void System
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Air Void System
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Freeze/Thaw
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Influences of Air on Content
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Affect on Properties
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Aggregates
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Various Different Aggregates
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Background
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Background
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Common Aggregates
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Important Characteristics of Aggregates
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Important Characteristics of Aggregates
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Shape and Texture of Aggregates
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Shape and Texture
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Chemical Soundness
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Aggregate Failure
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Alkali-Aggregate Reaction
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Sieves for Sieve Analysis
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Gradation
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Uniform Gradation
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Continuous Gradation
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Paste Requirements
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Gap Gradation
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Reinforced and Prestressed Concrete
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Flexure
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Flexural Stress Distribution
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Initial Cracking
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Failure
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Reinforced Beam
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Flexural Stress Distribution
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Initial Cracking
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Higher Load Level
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Ultimate Load
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Steel Reinforcement
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Preparing Re-bar
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Re-bar Ready for Pouring
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Steel- Concrete Bond
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Mechanical Bond
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Reinforced Concrete
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Prestressed
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Pre-stressing Re-bar
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Re-bar Setup for Pre-stressing
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Pre-Stressed Bridge Sections
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Pre-Stressed Beam
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Prestressed Concrete