21 Questions
In which year was the book 'Construction Databook: Construction materials and equipment' published?
2010
What is the meaning of the Latin word 'concretus'?
To grow together
When was the Roman Empire active?
From 20 B.C. to 200 A.D.
What is the purpose of covering concrete with sawdust, sand, or soil during curing?
To control the variation of the surface concrete
What is the main reason why natural curing is not suitable for structurally important elements?
Risk of cracking due to high evaporation rate
What is the purpose of using large electric blankets in electrical curing?
To heat the slab surfaces
What is the effect of high evaporation rate on the concrete?
It increases the risk of cracking
What is the characteristic of the current used in electrical curing?
High current and low voltage
What is the condition required for natural curing to be effective?
Low evaporation rate and no high heat
What is the consequence of inadequate moisture for the hydration process in concrete?
Reduced durability of the concrete
What is the primary purpose of the concrete slump test?
To assess the workability or consistency of concrete mix
How many layers of concrete are placed in the mould during the slump test?
3 layers
What is the unit of measurement for the slump test?
Centimeters
What is the term used to describe the only measurable slump in the test?
True Slump
Since what year has the slump test been widely used for workability tests?
1922
What is blast furnace slag, a byproduct of iron manufacture, classified as?
A hydraulic cement
What is the purpose of grading a concrete aggregate by passing a sample through a standard assortment of sieves?
To compare the particle size distribution of an actual aggregate with that of an ideal aggregate
What is the significance of the maximum aggregate size in a concrete mix?
It must be small enough to pass easily between the most closely spaced reinforcing bars and fit into the formwork
What is the characteristic of coarse-grained aggregates?
They will not pass through a sieve with 4.75 mm openings
What is the advantage of using larger aggregate pieces in a concrete mix?
They are more economical due to less surface area of the particles
What is the purpose of adding blast furnace slag to a concrete mix?
To improve the workability and increase the strength of the concrete
Learn about concrete, a fundamental building material in construction. This module covers the basics of concrete and its applications in a 1-week duration. Assess your understanding of concrete with this quiz.
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