7. Fresh Concrete – Properties and Workability Tests (IS Standards)
Fresh concrete is critical for effective handling, placement, compaction, and finishing of concrete structures. Its properties, including workability, consistency, cohesiveness, segregation, and bleeding, influence the final product's durability and strength. Various standardized tests, such as the slump test and compacting factor test, measure the workability of fresh concrete, ensuring quality control in construction practices.
Enroll to start learning
You've not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Sections
Navigate through the learning materials and practice exercises.
What we have learnt
- Fresh concrete should be workable, cohesive, and homogeneous for effective placement.
- Workability is influenced by factors such as water-cement ratio, aggregate shape, size, and admixtures.
- Standardized tests are essential for assessing workability and ensuring concrete quality.
Key Concepts
- -- Workability
- The ease with which concrete can be mixed, transported, placed, and compacted without segregation.
- -- Consistency
- The relative mobility or flowability of fresh concrete, indicating its wetness or dryness.
- -- Cohesiveness
- The ability of concrete to remain homogeneous during mixing and handling, resisting segregation.
- -- Segregation
- The separation of constituents of concrete, where coarse aggregates separate from the mortar.
- -- Bleeding
- The emergence of water on the surface of freshly placed concrete due to settlement.
- -- Slump Test
- A standardized method to assess the consistency and relative workability of fresh concrete.
- -- Compacting Factor Test
- A test that measures the workability of low workability concrete, providing more accuracy than the slump test.
- -- SelfCompacting Concrete (SCC)
- A type of concrete that flows and fills forms under its own weight, requiring specialized tests for workability.
Additional Learning Materials
Supplementary resources to enhance your learning experience.