OVERALL BSTF INDICES
13.07.2004

Calculation meanings of thermal conductivity

for various materials

Silicate brick - 0.95 Wt/m2*s

Complete body (non-hollow) red brick - 0,80 Wt/m2*s

Hollow large-scale brick - 0,5 Wt/ +Ю2*s

Keramzit (easily blown out clay) conrete  - 0,5  Wt/m2*s

Wooden squared beam - 0,15  Wt/m2*s

Foam plastic - 0,06 Wt/m2*s

Hard (rigid) and semi-hard (semi-rigid) mineral slabs "ROCKWOOL", "PAROC" - 0,04 Wt/m2*s (t.10*C)

Hard and semi-hard basalt slabs "ROTIS"- 0,04 Wt/m2*s (t.25*C)

THERMAL CONDUCTIVITY OF THE BASALT FIBERS

Type of fiber	Average fiber diameter, mm	Dependence of thermal conductivity on temperature A= f(t)	Average temperature thermal conductivity
			0*C	50*C	300*C
Microfine (microthin)	0,6	0,0238+0,000128 t av.	0,0313	0,0685	0,0983
Ultrafine (ultrathin)	0,75	0,0250+0,000125 t av.	0,0322	0,0686	0,0977
Superfine	1,2	0,0291+0,00014 t av.	0,0372	0,0779	0,1105
Fine	6,0	0,0360+0,000193 t av.	0,0472	0,1035	0,1483
Fine	10,3	0,0355+0,00024 t av.	0,0494	0,1193	0,1750

COMPARATIVE DESCRIPTION

* - windforce, from 0 (min) to 10 (max). It is considered to be average meaning according to the experts opinion poll.

BASALT FIBER WOOL THERMAL CONDUCTIVITY FACTOR OF LOW TEMPERATURE

 Basalt fiber wool under negative temperatures has very low thermal conductivity factor .

Thermal conductivity factor of the BSTF basalt fiber wool under temperature - 196*C and with overall mass 60 kg/m3 is 0,0302 Wt/(m-*C) (0,026 kkal/(m-h-*C)), and with t. 0 *C equals 0,0349 Wt/(m-*C) (0,030 kkal/(m-h-*C)).

High thermal insulation properties of the basalt fiber wool, as well as its durability under low temperature let us recommend this fiber wool as a cold insulation material for minus temperature.

Thermal conductivity factor of the BSTF basalt fiber wool (d = 1,7 mcm)