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EPS Flotation Components for Buoyancy

Airfoam Floatation Billets are the most cost effective bouyancy material in the market providing superior performance for virtually any commercial or residential floatation application. Made from expanded polystyrene (EPS) and 98% air, they are extremely lightweight & buoyant, floating 56 lbs/ft³ or more. With outstanding stability, EPS Flotation components resist decomposition, moisture, mold, fungi and many adverse conditions, including freeze-thaw cycles, while providing excellent compressive strength over very long service periods.

Airfoam Flotation Billets can be factory-shaped to your specific needs for fast installation into your flotation assembly system. Available with sturdy coatings for long term resistance to water penetration, punctures, and UV-rays, Airfoam EPS Flotation solutions can be used in fresh and salt water.

Applications

Boat docks, marinas, boathouses, swim rafts, piers, floating homes, even golf tees and floating heliport pads

Optional Coating

Poly-Urethane elastomeric coating is very sturdy, high performance protection for the EPS flotation core, providing excellent chemical and abrasion resistance. It is an inexpensive way to further protect your floatation investment especially in areas where petroleum-based products can be present.

EPS Types, Properties & Quality Assurance

Expanded Polystyrene (EPS) is a resilient, closed cell, rigid foam plastic material using air as main ingredient.

Material properties of Airfoam's various Geofoam Types

The standard full-size blocks are 48½" x 48½" x 194" (1.23m x 1.23m x 4.92m).

Property*
Units
Airfoam Types
ASTM Test
G15
G19
G22
G24
G29
G39
G46
Density
Minimum
kg/m3 14.4 18.4 21.6 24.0 28.8 38.4 45.7 D1622
lb/ft3 0.9 1.15 1.35 1.5 1.8 2.4 2.85
Compressive Resistance
@ 1% Strain
Minimum
kPa 25 40 50 57 75 103 128 D1621
Proc.A
psi 3.6 5.8 7.3 8.3 10.9 15 18.6
Elastic Modulus**
typical within elastic range
kPa 2500 4000 5000 5800 7500 10300 12800 D1621
psi 360 580 730 840 1090 1500 1860
Flexural Strength
Minimum
kPa 172 207240 276 345 414 517 C203
Proc.B
psi 25 3035 40 50 60 75
Third-Party Certified Type EPS15 EPS19    EPS29     D6817
Additional Compressive Resistance Properties**
@ 5% Strain
Minimum
kPa 55 90 115 140 170 241 300 D1621
Proc.A
psi 8.0 13.1 16.7 20.0 24.7 35.0 43.5
@ 10% Strain
Minimum
kPa 70 110 135 157 200 276 345
psi 10.2 16 19.6 22.7 29 40 50

* The test methods used to determine the above material properties provide a means of comparing different rigid, cellular polystyrene geofoam products. They are intended for use in specifications, product evaluations and quality control, but they are not intended to predict end-use product performance.   ** The elastic limit/yield point is between 1% and 2% strain. Compressive resistances at 5% and 10% strain are provided for applications where the intended end-use includes plastic (permanent) deformation under load; to limit it, use the 1% deformation values for design.

The ASTM Standard D6817 "Standard Specification for Rigid Cellular Polystyrene Geofoam" provides material properties of various EPS Types:

Property*
Units
Types
ASTM Test
EPS15
EPS19
EPS22
EPS29
EPS39
EPS46
Density
Minimum
kg/m3 14.4 18.4 21.6 28.8 38.4 45.7 D1622
lb/ft3 0.9 1.15 1.35 1.8 2.4 2.85
Compressive Resistance
@ 1% Deformation
Minimum
kPa 25 40 50 75 103 128 D1621
Proc.A
psi 3.6 5.8 7.3 10.9 15 18.6
Flexural Strength
Minimum
kPa 172 207240 345 414 517 C203
Proc.B
psi 25 3035 50 60 75
Limiting Oxygen Index
Minimum
% 24 2424 24 24 24 D2863
Additional Compressive Resistance Properties**
Compressive Resistance
@ 5% Deformation
Minimum
kPa 55 90 115 170 241 300 D1621
Proc.A
psi 8.0 13.1 16.7 24.7 35.0 43.5
Compressive Resistance
@ 10% Deformation
Minimum
kPa 70 110 135 200 276 345 D1621
Proc.A
psi 10.2 16.0 19.6 29.0 40.0 50

* The test methods used to determine the above material properties provide a means of comparing different rigid, cellular polystyrene geofoam products. They are intended for use in specifications, product evaluations and quality control, but they are not intended to predict end-use product performance.   ** Compressive resistance at 5% and 10% deformation are provided for applications where the intended end-use includes long-term (plastic) deformation under load.

Additional Properties for all Types

Expanded polystyrene (EPS) resists mold & fungi growth per ASTM C1338 testing and has no nutritional value for insects. To protect against termites place adequate physical barriers such as membranes around below-grade EPS.
Limiting Oxygen Index: min. 24% per ASTM D2863. Airfoam's EPS for construction applications contains a polymeric (non-HBCD) fire retardant modifier.
Max. Service Temperature: Long-Term Exposure 75°C [167°F], Intermittent Exposure 80°C [176°F]; Thermal expansion coefficient: 5-7 • 10-5/°K
Load Distribution: Poisson's ratio ≈0.12 within the elastic range; Coefficient of Friction: 0.5-0.7 along clean faces
Buoyancy-Force: min. 900 kg/m³ up to 986 kg/m³ [56-62 lbs/ft³]; Capillarity: None 
Solubility: Insoluble in water and in general chemically inert. EPS dissolves in hydrocarbons (e.g. fuels, oils, tar), organic solvents (e.g. acetone/ketones, benzene, paint thinner), ethers, esters, aldehydes and amines.
UV-light surface degradation: white EPS can be exposed to direct sunlight for a few weeks. Prolonged exposure to ultraviolet light creates a yellow dust on the surface of EPS products which has negligible impact on the products' properties but may require removal before adhering other materials such as coatings or self-adhesive membranes.
CAUTION: EPS products are combustible and must not be exposed to excessive heat, sparks, open flames, or any other sources of ignition. If stored/used in closed containers, confined, or low-lying areas, ensure adequate ventilation to prevent accumulation of flammable pentane vapours. Prevent inhalation of smoke, fumes or dust from burning or fabrication activities. GHS Classification: Non-Hazardous, see SDS

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