10 Questions
What is the primary reason for segregation in a concrete mixture?
Differences in the size of particles in the concrete mix
What is the term for the surface evidence of water rising to the top of freshly placed concrete?
Laitance
What is the primary consequence of bleeding in concrete?
Creation of water voids and decreased bond strength
What is the primary method for preventing segregation in concrete?
Properly grading aggregates and designing the mix
What is the term for the separation of the constituents from a heterogeneous mixture?
Segregation
What is the primary purpose of adding air entrainment to the mix in fresh concrete?
To prevent bleeding and reduce segregation
What is the primary factor that affects the strength of hardened concrete?
All of the above
What is the primary purpose of reducing the time between placing and start of curing in plastic shrinkage prevention?
To prevent plastic shrinkage cracking
What is the primary difference between compressive strength and tensile strength?
Compressive strength is the ability to resist pushing forces, while tensile strength is the ability to resist stretching or breaking
What is the primary purpose of measuring the flexural strength of hardened concrete?
To measure the resistance of unreinforced concrete slabs or beams to failure in bending
Learn about the definition, causes, and forms of segregation in concrete mixtures. Understand how differences in particle size, high water-to-cement ratio, and excessive vibration can lead to segregation. Test your knowledge on this important concept in civil engineering.
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