properties

Question 1

dry density

Answer 1

mass of volume unit of material with no pores inside the material

Question 2

bulk density

Answer 2

mass volume unit of loose material in bulk

Question 3

integrity

Answer 3

natural densiy divided by density

Question 4

humidity

Answer 4

contents of water in material at a moment

Question 5

absorption (weight)

Answer 5

ability of water absorption by material by atmospheric pressure

Question 6

absorbabilit. (by vol.)

Answer 6

mass of absorber water to volume of a test piece of dry material ratio

Question 7

hygrosocopity

Answer 7

“ability if quick absorption by material od water vapour from ambient air.”

Question 8

filterability

Answer 8

“Humidity of material under the influence of water under the pressure. Quantity of water [g] which penetrates in an hour through 1cm2 of surface of a test piece of material, by constant pressure.”

Question 9

saturation ratio

Answer 9

absorbability by volume/porosity

Question 10

evaporative power

Answer 10

“Evaporative power defines a time needed for drying water saturated material, till it will have a constant mass.”

Question 11

gas permeability

Answer 11

“Ability of penretrating by air and water wavor through construction materials is of great importance for natural ventilation, so i serves dehumidyfying of walls and floors.”

Question 12

freeze resistance

Answer 12

The resistance to destruction pf structure of material by multiple cycles of freezing and defrosting.

determined by:

• lack of defect
• mass lost

Question 13

contraction

Answer 13

The change of volume (% of volume) or linear dimensions (in mm/m) of humid material by drying.

Question 14

corrosion resistance

Answer 14

“[Resistance] to unintentional chemical or electrochemical processes as a result of influence of surrondings or of reaction between components of material, negatively changing its properties and functional suitability.”

Question 15

ageing resistance

Answer 15

The resistance to the process of changes op properties in time, generated by atmospheric factors (heat, light, air).

Question 16

thermal expansion

Answer 16

change of dimensions under the influence of heat

Question 17

thermal conductivity

Answer 17

“Conduction of heat through a material as a result of difference of temperature on its opposite surfaces.”

Question 18

heat capacity

Answer 18

“Ability to absorption and storage of heat by material during its heating

Question 19

heat capacity

Answer 19

“Ability to absorption and storage of heat by material during its heating (a measure is quantity of heat needed for heating 1m3 of material of 1 K)

Question 20

specific heat

Answer 20

Expressed by amount of heat, which is needed for heating a ! kg of material of 1 K.

Question 21

heat resistance

Answer 21

“Resistance of material to influence of increased temperature rp i cycles

Question 22

cree resistance

Answer 22

“The ability of material to remain initial rperties in high or increased temperature.”

Question 23

fire resistance

Answer 23

“Resistance to destructive

Question 24

combustibility

Answer 24

susceptibility to fire

Question 25

toxicity

Answer 25

the ability to emission of harmful gases, vapors and smokes by materials by increased temperature

Question 26

compression strength

Answer 26

"(...) The highest stress, which resists a test piece of material during compression to a moment of its crushing."

Question 27

tensile strength

Answer 27

"{...) the highest stress which resists a test piece of material during tension."