Fiber Cement Board

TECHNICAL & PHYSICAL SPECIFICATIONS OF FIBER CEMENT BOARDS

Physical Properties

Result

Standards

Flextural Strength

ASTM C1185

a. Flextural Strength (Along the Fibre)

14.0 N / mm2

b. Flextural Strength (Across the Fibre)

8.1 N / mm2

Modulus of Elasticity

ASTM C 1185

a. Modulus of Elasticity (Along the Fibre)

8726.3 N / mm2

b. Modulus of Elasticity (Across the Fibre

6557.2 N / mm2

Adhesion/Lamina (Bond) Strength, average

15 N / mm2

ASTM D 1037

Screw Withdrawl Strength

ASTM D 1037

a.Perpendiculor to the Surfoce (Dry Condition)

1243.2 N

b . Porollel to the Surfoce (Dry Condition)

791.2 N

Compressive Strength. overoge

2.6 N / mm2

ASTM D 1037

Apporent Density

1355.8 kg/m3

ASTM C 1185

ll. Moisture Resisfonce Properlies

Result

Standards

Moisture Content (at EMC *)

6-8%

ASTM C 1185

lmpact Strength

15600 N/mm2

ASTM C 1185

Thermal Conductivity

0.14 w/mk

ASTM C 518

Moisture Movement

6% – 8%

ASTM C 1185

a. Length

-0.0002

b. Width

-0.0002

Woter Absorption, average

0.313

ASTM C 1185

Water Tightness

No water droplets at the underside of sample

ASTM C 1185

lll. Durability

Result

Standards

Water lmpermeobility

No drops after 24 hrs

ISO:8336 (Part E)

Frost Resistonce (Freeze/Thaw Tests)

Passes in 25 cycles

ISO:8336 (Part E)

Warm Water

Passes in 25 cycles

ISO:8336 (Part E)

Soak Dry

Passes in 25 cycles

ISO:8336 (Part E)

Heat Rain

Passes in 25 cycles

ISO:8336 (Part E)

lV. Fire Resistance Properties

Result

Standards

a. Surface burning Characteristic

ASTM E 84

Time to Ignition (in sec)

No Ignition

“0” – is the best result

Flame Spread Index

0

Smoke Developed Index

0

b. Resistance to Fire

BS: 476

Combustibility

Non – Combustible

Part 4

Ignitability

Class “P” – not easily ignited

Part 5

Fire Propagation Index

<3

Part 6 (Limit < 12)

Surface Spread of Flame