KLB flat blocks W3

Modified hollow blocks for high requirements for thermal insulation / Approval Z-17.1-766

 

KLB flat blocks W3 are equivalent to thermally-modified hollow blocks. These thermal insulation blocks have several chambers with only narrow chamber widths and are also blocks for use where there are high thermal insulation requirements. KLB flat blocks W3 are very well suited for single-shell or multi-shell masonry with additional dampening. Simultaneously these blocks can also be used as basement exterior walls or load-bearing interior walls . Their processing is done as with KLB flat blocks SW1 with the same thin-bed mortar, which is supplied with all KLB flat blocks in sufficient quantity with all deliveries.

 

They have the building approval Z-17.1-766, which among others confirms the special thermal insulation properties of the blocks.

  • W3 - 17,5 cm
  • W3 - 24,0 cm
  • W3 - 30,0 cm
  • W3 - 36,5 cm

Block variety/Block type

KLB flat blocks W3 - Z-17.1-766

Wall thickness

cm

17,5

Format

 

12 DF

Length

mm

497

Width

mm

175

Height

mm

249

Number of chamber/slot rows

 

3

Tensile strength class (medium tensile strength)

(N/mm²)

2 (2,5)

4 (5,0)

Compressive stress σ0 m. DBM "L"

MN/m²

0,5

0,8

Character. Value of compressive strength fk

MN/m²

1,3

2,1

Gross density class

 

0,50

0,60

Calculated weight with DBM "L"

kN/m³

6,0

7,0

Coefficient of thermal conductivity λR with DBM "L"

W/mK

0,13

0,16

Thermal resistance  RT with DBM

m²K/W

1,62

1,37

U-value*) with DBM

W/m²K

0,62

0,73

Heat storage capacity

kJ/m²K

143

155

Cool down time

h

43

52

Fire resistance, α2 = 1.0, plastered

 

F 30-A **)

Fire wall, plastered once

 

no

Fire wall, plastered twice

 

no

Block requirements per m²

piece

8

8

Block requirements per m³

piece

46

46

Mortar requirements per m²

Liter

2,6

2,6

Mortar requirements per m³

Liter

12

12

Working time reference value full masonry

h/m³(h/m²)

(0,40)

(0,45)

Working time reference value categorised. Masonry

h/m³(h/m²)

(0,40)

(0,45)

Packet/palette content

piece

60

60

Average weight per block 1)

kg

14

17

Article number 40391070

 

35406

35925

Main field of application 2)

 

2, 3, 4

2, 3, 4

Block variety/Block type

KLB flat blocks W3 - Z-17.1-766

Wall thickness

cm

24,0

Format

 

16 DF

Length

mm

497

Width

mm

240

Height

mm

249

Number of chamber/slot rows

 

4

Tensile strength class (medium tensile strength)

(N/mm²)

2 (2,5)

4 (5,0)

Compressive stress σ0 m. DBM "L"

MN/m²

0,5

0,8

Character. Value of compressive strength fk

MN/m²

1,3

2,1

Gross density class

 

0,50

0,60

Calculated weight with DBM "L"

kN/m³

6,0

7,0

Coefficient of thermal conductivity λR with DBM "L"

W/mK

0,13

0,16

Thermal resistance  RT with DBM

m²K/W

2,12

1,78

U-value*) with DBM

W/m²K

0,47

0,56

Heat storage capacity

kJ/m²K

182

200

Cool down time

h

99

89

Fire resistance, α2 = 1.0, plastered

 

F 30-A **)

Fire wall, plastered once

 

no

Fire wall, plastered twice

 

no

Block requirements per m²

piece

8

8

Block requirements per m³

piece

33

33

Mortar requirements per m²

Liter

3,0

3,0

Mortar requirements per m³

Liter

12

12

Working time reference value full masonry

h/m³(h/m²)

1,75

1,80

Working time reference value categorised. Masonry

h/m³(h/m²)

1,95

2,00

Packet/palette content

piece

48

48

Average weight per block 1)

kg

19

23

Article number 40391070

 

35444

35956

Main field of application 2)

 

3, 3, 4

2, 3, 4

 

Block variety/Block type

KLB flat blocks W3 - Z-17.1-766

Wall thickness

cm

30,0

30,0

Format

 

20 DF

10 DF

Length

mm

497

247

Width

mm

300

300

Height

mm

249

249

Number of chamber/slot rows

 

5

5

Tensile strength class (medium tensile strength)

(N/mm²)

2 (2,5)

   

2 (2,5)

4 (5,0)

 

Compressive stress σ0 m. DBM "L"

MN/m²

0,5

 

0,5

0,8

 

Character. Value of compressive strength fk

MN/m²

1,3

 

1,3

2,1

 

Gross density class

 

0,45

 

0,50

0,60

 

Calculated weight with DBM "L"

kN/m³

5,5

 

6,0

7,0

 

Coefficient of thermal conductivity λR with DBM "L"

W/mK

0,12

 

0,13

0,16

 

Thermal resistance  RT with DBM

m²K/W

2,78

 

2,59

2,15

 

U-value*) with DBM

W/m²K

0,36

 

0,39

0,46

 

Heat storage capacity

kJ/m²K

203

 

218

248

 

Cool down time

h

147

 

147

136

 

Fire resistance, α2 = 1.0, plastered

 

F 90-A

F 90-A

Fire wall, plastered once

 

no

no

Fire wall, plastered twice

 

-

-

Block requirements per m²

piece

8

 

16

16

 

Block requirements per m³

piece

27

 

54

54

 

Mortar requirements per m²

Liter

3,6

 

3,6

3,6

 

Mortar requirements per m³

Liter

12

 

12

12

 

Working time reference value full masonry

h/m³(h/m²)

1,45

 

1,70

1,70

 

Working time reference value categorised. Masonry

h/m³(h/m²)

1,60

 

1,95

1,95

 

Packet/palette content

piece

36

 

72

72

 

Average weight per block 1)

kg

22

 

12

14

 

Article number 40391070

 

35420

 

35468

35963

 

Main field of application 2)

 

2, 3

 

2, 3

2, 3

 

Block variety/Block type

KLB flat blocks W3 - Z-17.1-766

Wall thickness

cm

36,5

Format

 

12 DF

Length

mm

247

Width

mm

365

Height

mm

249

Number of chamber/slot rows

 

6

Tensile strength class (medium tensile strength)

(N/mm²)

2 (2,5)

2 (2,5)

4 (5,0)

 

Compressive stress σ0 m. DBM "L"

MN/m²

0,5

0,5

0,8

 

Character. Value of compressive strength fk

MN/m²

1,3

1,3

2,1

 

Gross density class

 

0,45

0,55

0,60

 

Calculated weight with DBM "L"

kN/m³

5,5

5,5

7,0

 

Coefficient of thermal conductivity λR with DBM "L"

W/mK

0,12

0,14

0,16

 

Thermal resistance  RT with DBM

m²K/W

3,32

2,89

2,56

 

U-value*) with DBM

W/m²K

0,30

0,35

0,39

 

Heat storage capacity

kJ/m²K

239

271

294

 

Cool down time

h

209

208

195

 

Fire resistance, α2 = 1.0, plastered

 

F 90-A

Fire wall, plastered once

 

no

Fire wall, plastered twice

 

-

Block requirements per m²

piece

16

16

16

 

Block requirements per m³

piece

44

44

44

 

Mortar requirements per m²

Liter

4,5

4,5

4,5

 

Mortar requirements per m³

Liter

12

12

12

 

Working time reference value full masonry

h/m³(h/m²)

1,60

1,65

1,65

 

Working time reference value categorised. Masonry

h/m³(h/m²)

1,85

1,90

1,90

 

Packet/palette content

piece

60

60

60

 

Average weight per block 1)

kg

13

15

17

 

Article number 40391070

 

35895

35598

35000

 

Main field of application 2)

 

2, 3

2, 3

2, 3

 

*) plastered, inside with 15 mm gypsum light-weight plaster λR = 0.35 W/mK, outside with 20 mm mineral fibre light-weight plaster λR = 0.31 W/mK

- not applicable, not standard

1) higher weight possible depending on weather

2) 1 = basement masonry, 2 = exterior masonry, 3 = back-up masonry, 4 = interior masonry, 5 = light-weight separation wall, 6 = statically stressed masonry, 7 = sound insulating masonry, with addition “x” = supplementary block

3) time for m² with offset aid, as blocks are > 25 kg