QUALITATIVE CHARACTERISTIC OF MARBLE

The Zarbandsky field of marble is located in 120 km on the North-West from Samarkand. By administrative situation a pit Zarband treats Ishtikhansky district of the Samarkand region.

Marble light gray to white, gray, dark gray, sites striate, on a block stone for production of decorative marble slabs, quarrystone, crushed stone, lime.

Marble Poliruyemost perfect, gloss mirror, polirov-

bathing surface pure, evenly granular, without cracks and

sinks. On physicomechanical properties there corresponds GOST on a decorative and facing stone.

1. Average data of physicomechanical properties:

- volume weight - 2.70 g/cm3

- density - 2.71 g/cm3

- water absorption - 0.2%

- porosity - 0.9%

- an istirayemost - 0.4 g/cm2

- durability on compression

in a dry state - 600-1264 g/cm2

- decrease coefficient

durabilities at water saturation - 0.9

- coefficient of frost resistance-0.9

- module of elasticity-3570-89937

- an exit of blocks from mountain weight at production

The stone-cutting equipment - 40 - 50%

2. A chemical composition of marble in %

SAO - 53.3 Sa of CO3 - 95

MDO - 0.3 Fe2O3 - 0.1

SiO2 - 1.9 - 0.1

Al2 O3 - 0.9 pct of item-42.7

Marble 1.5-3.5mkr/chas radioactivity, jointed in zones of breaks - 15 μR/hour.

By a radiation and hygienic assessment field marble

are in limits of norms of 1 class and it is allowed for use in constructions of residential and industrial buildings without restrictions.