12 Questions
What is the primary characteristic of a fresh concrete mix in terms of placeability?
Consistency and workability
What is the ratio of cement, sand, and coarse aggregate for very high strength concrete mixes?
1:1.2:2.4
Which method of testing is used in the American Standard?
Cylinder Testing
What is the advantage of machine mixing over hand mixing?
Less cement required
What is the recommended minimum mixing time for concrete?
1 minute
What percentage of the mixing water should be placed in the drum before adding dry materials?
10%
What is the primary reason why concrete requires tension reinforcement?
Due to its low tensile strength
What is the term used to describe the ability of freshly mixed concrete to flow?
Consistency
Why is concrete considered a heavy material?
Due to the density of its aggregate components
What is the purpose of using forms, falsework, and shoring during concrete construction?
To support the concrete during its initial curing process
What is a common issue that can affect the quality of concrete?
Variations in proportions, mixing, placing, and curing
What is the primary economic advantage of using concrete in construction?
It is an inexpensive material, often using local resources
Test your knowledge of concrete, a widely used construction material, and its properties, advantages, and disadvantages. Learn about its composition, strengths, and weaknesses, as well as the importance of reinforcement. Assess your understanding of this fundamental building material.
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