Thermal conductivities of various materials at 77 F temperature

Material                                                     BTU/ft2 /ft hr oF

Air

0.014

Aluminum

145

Asphalt

0.43

Brick dense

0.76

Brick work

0.40

Carbon dioxide

0.0084

Cement, portland

0.17

Cement, mortar

0.99

Chalk

0.05

Chrome Nickel Steel (18% Cr, 8 % Ni)

9.4

Clay, dry to moist

0.0.086 - 1.04

Clay, saturated

0.34 – 1.44

Concrete, light

0.24

Concrete, stone

0.98

Copper

231

Cork

0.04

Cotton

0.017

Earth, dry

0.87

Fiberglass

.023

Glass

0.61

Gold

179

Granite

0.98 – 2.3

Ice (0oC, 32oF)

1.26

Iron

46.2

Limestone

0.72 - 1.02

Mercury

4.6

Mineral insulation materials, wool blankets ..

0.023

Oil, machine lubricating SAE 50

0.09

Olive oil

0.098

Oxygen

0.0138

   

Polyethylene HD

0.24- 0.29

PVC

0.109

Quartz mineral

1.7btu

Rock, porous volcanic (Tuff)

0.29 – 1.44

Sand, dry

0.09 - 0.14

Sand, moist

0.14- 1.15

Sand, saturated

1.15 – 2.3

Sandstone

0.98

Sawdust

0.046

Silver

248

Snow (temp < 0oC)

0.029 - 0.14

Soil, with organic matter

0.09 – 1.15

Soil, saturated

0.35 – 2.31

Styrofoam

0.019

Vermiculite

0.033

Water

0.33