9 Questions
What type of aggregates should range in size to give a more workable mix?
Rounded aggregates
Which type of aggregates make concrete stronger but harder to place, work, and compact?
Coarse aggregates
What percentage of the concrete mixture do well-graded aggregates generally account for?
30% - 35%
What is the primary reason to avoid using sea water in concrete mixtures?
It may rust the steel reinforcement
Which type of admixture improves workability, density, and long-term strength of concrete?
Fly ash, hydrated lime
What do poorly graded aggregates result in?
Less compact concrete due to air voids
What is the primary function of water reducers in concrete mixtures?
Reduce the water content without affecting workability
'Harder to place, work, and compact' refers to which type of aggregates?
'Crushed rock, gravel or screenings'
Which admixture should be used if you want to speed up the setting process?
Set accelerators/acceleration plasticizers
Test your knowledge on concrete surface defects such as crazing, dusting, rain damage, spalling, and efflorescence. Learn about the causes and characteristics of each type of defect.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
