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8. Segregation
The chapter outlines the behavior and properties of fresh concrete, addressing critical phenomena such as segregation, bleeding, slump loss, and re-tempering. It emphasizes the importance of understanding these aspects for effective handling, placement, and finishing on construction sites. Additionally, various control measures and practices are discussed, alongside the use of admixtures, to optimize the characteristics of fresh concrete.
Sections
Segregation in fresh concrete refers to the separation of its components, leading to non-uniform compositions that can negatively impact structure quality.
This section defines bleeding in concrete, outlines its types, causes, effects, and control measures.
Slump loss refers to the reduction in workability of fresh concrete over time, impacting placement and compaction.
Re-tempering involves the re-introduction of water to regain workability in concrete that has started to set.
This section outlines essential field practices aimed at minimizing defects in fresh concrete, emphasizing effective handling, placement, and supervision.
This section discusses the critical properties of fresh concrete, including segregation, bleeding, slump loss, and re-tempering, emphasizing their impact on construction quality.
Admixtures are essential additives that improve the workability, durability, and overall performance of fresh concrete during its initial phase.
This section discusses the impact of various factors on fresh concrete, including segregation, bleeding, slump loss, and re-tempering, and provides guidelines from Indian standards.
Fresh concrete properties significantly impact the quality and durability of hardened concrete.
Segregation and bleeding are critical issues that can affect the performance of concrete.
Proper handling and site practices can minimize defects in fresh concrete.
Segregation
The separation of concrete's constituents, leading to a non-uniform composition and reduced strength.
Bleeding
The phenomenon where water rises to the surface of freshly placed concrete, caused by the settlement of solid particles.
Slump Loss
The reduction in workability of fresh concrete over time, making placement and compaction challenging.
Re-tempering
The practice of adding water to concrete after initial setting has begun, often weakening the mix.
Practice Exercises
Total Questions
2
Estimated Time
4 min
Passing Score
70%
Instructions
- Read each question carefully
- You can use hints if you need help
- Complete all questions before submitting
Get your answers marked and your progress tracked
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