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WorksheetsECS1073_CHAPTER 1 (CONCRETE)
Total questions: 10
Worksheet time: 2mins
Concrete is a composite material, consisting mainly of
Cement, air, aggregate
Cement, water, aggregate
Cement, fine aggregate, coarse aggregate
Cement, air, water
1:2:4 concrete ratio refer to
Water : cement : aggregate
Cement : water : aggregate
Cement : air : water
Cement : fine aggregate : coarse aggregate
What is grade of concrete?
The minimum strength of concrete after 28 days
The maximum strength of concrete after 28 days
The minimum strength of concrete after 14 days
The maximum strength of concrete after 14 days
M25 grade of concrete means
Mix concrete at 25 N/mm2 compressive strength at 14 says
Mix concrete has 25 N/mm2 compressive strength at 28 days
Mix concrete has 25 N/mm2 durability at 28 days
Mix concrete has 25 N/mm2 durability at 14 days
Aggregate can be classified into 3 categories except
Normal aggregate
Light weight aggregate
Coarse aggregate
Heavy weight aggregate
Size particle for coarse aggregate is
Below 5 mm
Above 5 mm
Below 0.07 mm
Between 0.06 - 0.002 mm
2 types of cements are
Natural cement and portland cement
Hydraulic cement and high alumina cement
Hydraulic cement and natural cement
High alumina cement and portland cement
The water-cement ratio is not influenced by
Grade of concrete
Workability
Durability
Toughness
Types of admixture as follow except
Accelerators
Retarders
Adding water
Plasticizers
Slump Test is used to measure workability of the concrete. Below are types of slump except
Lean slump
True slump
Shear slump
Collapse slump
