Powerpoint 1

Question 1

what forms can masonry come in?

Answer 1

Bricks and blocks

Question 2

What is dependant on whether brick or block?

Answer 2

size and dimensions!

Question 3

what are clay bricks

Answer 3

shaping plastic clay into brick forms

then firing between 900-1200 in a kiln

Question 4

is fired clay porous?

Answer 4

YES.

Question 5

What properties does a porous material define?

Answer 5

1. Porosity
2. Density
3. Compressive strength
4. Moisture expansion
5. Frost resistance
6. Fire resistance

Question 6

How are volumes of pores determined?

Answer 6

mass of water they contain

Question 7

If a brick is frogged, what does this mean it will contain?

Answer 7

Mortar.

Question 8

As there is a big variation in strength , how is compressive strength tested?

Answer 8

Done over more than six bricks

Question 9

Moisture content influences what?

Answer 9

Test strength due to liquid water within pores producing hydrostatic pressures- rupturing pore walls

Question 10

does brickwork undergo creep?

Answer 10

yah

Question 11

Does brick ceramics undergo creep?

Answer 11

nein

Question 12

what is efflorescence?

Answer 12

discolouration of brickwork due to its salts brought to the surface by water

Question 13

where can efflorescence come from

Answer 13

mortar
external
the brick itself

Question 14

what is efflorescence dependant on?

Answer 14

1. quantity of soluble salts
2. composition
3. pore structure

Question 15

what happens when bricks are exposed to air

Answer 15

they eX PAND

Question 16

What happens to bricks when they are exposed to temperature where water freezes

Answer 16

the water expands

and the brick cracks

Question 17

are bricks made strong from firing?

Answer 17

yes. the bricks are strong, and rigid. meaning they are stable in fire conditions

Question 18

what are the main properties of clay bricks?

Answer 18

1. good in fire/ chemical situ’s.