Question
Download Solution PDFDue to segregation of well-mixed concrete, ________.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFSegregation of Concrete
Segregation in concrete refers to the separation of the constituent materials, such as cement paste and aggregates, during handling and placement. This can lead to several negative effects:
- Reduced Strength: Segregation causes a decrease in the overall strength of concrete, as the homogeneity of the mix is compromised.
- Porosity and Permeability: Segregation results in porous or honeycombed concrete, which increases the permeability of the concrete. This can lead to issues like leakages, corrosion, and carbonation.
- Cracking: Segregated concrete is more prone to developing cracks, which decreases its durability over time.
- Decreased Workability: Uniform mixing is essential for easy placement and finishing. Segregation disrupts this uniformity, making the concrete less workable.
- As per clause 13.2 of IS 456: 2000, the maximum permissible free fall of concrete to avoid segregation may be taken as 1.5 m or 150 cm.
Last updated on May 28, 2025
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