G1 - LT#1 Uses for Concrete

Question 1

Plain concrete is:

Answer 1

Concrete without any reinforcement

Question 2

Thermal expansion of concrete or steel must be:

Answer 2

The same rate in both

Question 3

Cenent paste bonds only to:

Answer 3

Both steel and aggregates

Question 4

Pre-stressed concrete is:

Answer 4

Under tension at all times

Question 5

Pre-tensioning is:

Answer 5

Before concrete is placed

Question 6

Is a flat roof a concrete shell roof?

Answer 6

No

Question 7

What reproduces the texture of forming materials?

Answer 7

Form lining

Question 8

The term concrete masonry means:

Answer 8

Bricks or blocks

Question 9

Concrete with air entrainment is:

Answer 9

Microscopic air bubbles

Question 10

A cement mixture applied with compressed air is called:

Answer 10

Shot-crete

Question 11

What makes pervious concrete different from other types?

Answer 11

It is porous

Question 12

Advantages of pervious concrete:

Answer 12

1) Water percolates through into soil below
2) It is environmentally friendly
3) May save materials and labour

Question 13

Concrete provides what strength?

Answer 13

Compressive

Question 14

Rebar provides what strength?

Answer 14

Tensile

Question 15

The amount of overlap for rebar is:

Answer 15

24 times the diameter of the bar

Question 16

Calcium chlroride should not be used in an accelerator in concrete because:

Answer 16

It corrodes the steel

Question 17

In marine structures, what kind of rebar is used?

Answer 17

Epoxy paint rebar

Question 18

What is soil-cement?

Answer 18

Simple, highly compacted mixture of soil. Portland cement and water.

Used mainly for paving roads, streets, and airports.

Thin bituminous sealing course is placed over it.

Question 19

What is shotcrete?

Answer 19

Concrete that is applied by a pneumatically operated gun.

Question 20

Non shrink grout used for?

Answer 20

Supporting machine bases and columns.

Question 21

Mortar is:

Answer 21

Mixture of cement, water and sand.

Question 22

What is self-leveling gypsum?

Answer 22

Concrete can act a noise and fire separation. Self-leveling, no troweling ior fginishing.

Question 23

Pervious concrete is?:

Answer 23

Used mainly in slab-on-grade type -porous so that water passes through