increase in water-cement ratio

increase in fineness of cement

decrease in curing time

decrease in size of aggregate

The mixed concrete inside the mixer is normally less than 65% of the mixer’s volume

None of the above

It uses one specific speed during mixing, discharging and agitating

It distributes the concrete uniformly during mixing, discharging and agitating

Decreasing the aggregate’s elasticity modulus

None of the above

Increasing the aggregate content

Increasing the w/c ratio

1 με

1000 με

100 με

10 με

None of the above

After 1 year

After 7 days

After 28 days

The effect of crushed aggregates on strength is more in a concrete member made of RHPC compared to that made of OPC.

None of the above

For a concrete member made of RHPC and crushed aggregates, strength is less than that of a concrete member made of OPC and gravel aggregates.

For a concrete member made of OPC and crushed aggregates, strength is less than that of a concrete member made of OPC and gravel aggregates.

Sustainability

Serviceability

Structural integrity

Durability

Higher w/c has lower heat of hydration

Lower w/c leads to more capillary pores in the concrete

Lower w/c has lower heat of hydration

Higher w/c leads to higher slump

Lower w/c leads to less capillary pores in the concrete

None of these

20 m

30 m

3 m

2 m

time of transit

size of aggregate

water-cement ratio

the air in the mix