BGN142 Construction Material (I)

____________ contributes to early strength development in the first few days.

• TRICALCIUM SILICATE (C3S)

• TRICALCIUM ALUMINATE (C3A)

• DICALCIUM SILICATE (C2S)

• TETRACALCIUM ALUMINOFERRITE (C4AF)

Aggregate forms _________ of the volume of concrete

• 60 - 70%

• 25 - 40%

• 75 – 80%

• 50 - 75%

__________ is important influence on the quality of concrete produced.

• Percentage of material

• Quantity of aggregates

• Type of cement

• Water-cement ratio

Grading of aggregate can have considerable effect on the __________ and stability of concrete.

• grading

• workability

• proportion

• volume

Which of the following materials are used to make concrete?

• Sand, clay, shingle, water

• Cement, water, aggregate, sand

• Cement, shingle, water, stone

• Cement, clay, gypsum, water

Clay is ____________ soil, so can be shaped when wet.

• porous

• cohesive

• non-cohesive

• silt

Bricks will be burnt in kilns at 600 degree Celsius. After that, temperature will increase to 900 degree Celsius to get a ___________ process.

• conductivity

• hardness

• shrinkage

• vitrification

______________ obtained by the deposition of weathered and transported pre-existing rocks.

• Sedimentary rock

• Igneous rock

• Crushed rock

• Metamorphic rock

Proper grading of aggregate produce _________ concrete.

• fine

• porous

• bleeding

• dense

All-in-aggregates also referred as _______________.

• crushed gravel aggregates

• pit run aggregates

• natural occurring stones

• disintegration aggregates