Technical Info

Hollowblocks produced in Balti Kivitehas Ltd are certified in Certification Centre of Tallinn University of Technology 

hollow blocks
Measures (LxWxH)

mm

390x240x190 390x190x190 390x140x190390x90x190
Tolerance class 

D1

D1

D1

D1

Weight2

kg

20

17

13

10

Net dry density3

kg/m3

2000

2000

2000

2000

Gross dry density

kg/m3

1020

1040

1100

1380

Masonry weight4

kg/m2

270

232,5

182,5

145

Filled part5

%

51

53

55

69

Compressive strength6

MPa

18

18

18

18

Compressive strength, Fb7

N/mm2

12

9,54

9,90

12,42

Frost resistance

mark

F56

F56

F56

F56

Water absorption8

%

8

8

8

8

Capillary water absorption

g/m2xs0,5

208

208

208

208

Water steam diffusion factor 

5/15

5/15

5/15

5/15

Airborne sound insulation index9

db

51/58

49/56

47/52

45/48

Thermal resistance, R10

m2xK/W

0,26

0,24

0,21

0,19

Equivalent coefficient of heat conductivity

W/mxK

1,19

1,19

1,19

1,19

Fire resistance11

minut

Euroklass A1

Euroklass A1

Euroklass A1

Euroklass A1

  1. Permitted measurement deviations: length, width, height +/- 2 mm
  2. Average hollow block weight in the condition of moisture content of 3-5%
  3. Minimum net dry density of a hollow block
  4. Minimum gross dry density of a hollow block
  5. Filled part indicates quantity of concrete in the block
  6. Average compressive strength to net cross-section of the surfaces in dry-air condition
  7. Normalised compressive strength of an aggregate masonry unit used in estimations as per EPN-ENV 6.1.1.
  8. Water absorption shall not exceed 8% of the weight of a hollow block
  9. Indicates water steam permeability in case of material with the given net dry density (table method)
  10. A reference value for given masonry (without aggregate/fully aggregated)
  11. A reference value for given masonry (without aggregate) Full aggregated =1.3
  12. Equivalent coefficient of heat conductivity is calculated based on the table method
  13. Although hollow blocks (aggregate masonry units) belong to non-combustive construction materials (class A1), it is not recommended to use these in places where temperatures may rise over 200°C
  14. Estimated, does not include weight of possible infill concrete and armouring (based on masonry mix consumption 20 kg/m2)

Pavement stone (Classic)
Width1

mm

98±2

Height

mm

60±3

Length1

mm

198±2

Mass2

kg

 2,5

Density3

kg/m3

 2200

Volume4

MPa

3,6 

Water absorbency(max)5

%

 8

Frost resistance (min)

 mark

 F56

Abrase resistance

g/cm2

 
Expense

tk/m2

 50

Pavement stone (Unikivi 60)
Width1

mm

112,5±2

Height

mm

60±3

Length1

mm

225±2

Mass2

kg

 3,4

Density3

kg/m3

 2200

Volume4

MPa

 3,6

Water absorbency (max)5

%

 8

Frost resistance (min)

 mark

 F56

Abrase resistance

g/cm2

 
Expense

tk/m2

 39

Pavement stone (Unikivi 80)
Width1

mm

112,5±2

Height

mm

80±3

Length1

mm

225±2

Mass2

kg

 4,65

Density3

kg/m3

 2200

Volume4

MPa

 3,6

Water absorbency (max)5

%

 8

Frost resistance (min)

 mark

 F56

Abrase resistance

g/cm2

 
Expense

tk/m2

 39

  1. Laius/pikkus ilma kivi külgedel asuvate vuugieenditeta (eendite paksus on 2 mm)
  2. Average pavement stone weight in the condition of moisture content of 3-5%
  3. Minimum net dry density of a pavement stone
  4. Compressive strength
  5. Water absorption shall not exceed 8% of the weight of a pavement stone