| The characteristic of nature
stone
The nature stone is one of the building materials that
mankind used at the earliest stage. The wonderful color
in surface and rock evolvement become much more noble, bright
texture by the design of the architecture
Nowadays, more and more people try applying the rich color
and plentiful vein to ameliorative city in monotonous landscape.
For example be affixed in the stone concrete construction,
or be affixed in the arched door and so on.
General characteristic.
For the nature stone,the use of the physics material is
more often,but the chemistry analysis is useful too. Such
the examinatio to the some harmful oxide.For example:
In the big industry city of the eastern of the United States,
the pollution of the air is serious, even through the surface
granite will suffer to erode.
How to choose the material becomes much more inportant.The
stone which contain the easily oxidizing material will be
forbid to use.Such as the yellow iron mine, will born the
stain, change colors or decay.
Some physical characteristics are as follows:
The strength of anti- presses PSI( Kgs/ cm2) absorbs water
rate the degree of hardness( Toughness Index)
| Category |
Compressive strength(kgs/m2) |
Sob Rate(%) |
Toughness Index |
Abrasion Rate(%) |
| Granite |
25,000(1,758) |
0.3 |
19 |
41.5 |
| Sandstone |
22,900(1,610) |
0.21 |
12 |
58.7 |
| Quartzite |
31,000(2,179) |
0.24 |
19 |
26.1 |
| Limestone |
11,500(808) |
0.61 |
8 |
33.8 |
| Slate |
21,800(1,533) |
0.36 |
18 |
/ |
| Serpentine |
43,000(3,023) |
0.74 |
13 |
18.5 |
The Contruction Characteristic of the Marble:
| Compressive
strength PSI |
6,012-16,750。 |
| Flexural strength PSI |
1,O95-2,709。 |
| Shear strength PSI |
1,638-4,812。 |
| Modulus of Elasticity
PSI |
1.97-14.85X106。 |
| Density (Ibs/ft) |
163.0-172.4。 |
| Heat exchange rate (k
BTU/in/hr/f2t/0F) |
10.45一15.56。 |
| Water vapour(Perm-Inch)
|
0.324-4.46。 |
| Creep-Deflation, inch's
after 24HR |
O-3.3X1O-4。 |
| |
Compressive strength PSI |
Pull Strength |
Flexural modulus |
Shear modulus |
Spring modulus |
Proportion |
| Granite |
703-2813 |
42.2-70.3 |
91.4-169 |
140.6-302.3 |
4.0-6.7X10-5 |
2.65-2.75 |
| Limestone |
176-2000 |
19.7-62.6 |
42.2-155 |
84.4-210.9 |
2.1-7.3X10-5 |
2.0-2.7 |
| Marble |
562-1900 |
28.2-161.7 |
42.2-246 |
91.4-457 |
5.0-10.2X10-5 |
2.60-2.84 |
| Basalt |
1970-4710 |
/ |
/ |
/ |
/ |
2.4-3.1 |
| Serpentine |
773-1970 |
56.2-112.5 |
/ |
182.8-351.5 |
3.4-5.4X10-5 |
/ |
| Sandstone |
352-1405 |
19.7-35.2 |
35.2-70.3 |
21.1-210.9 |
1.3-5.4X10-5 |
2.5-2.7 |
| Argillite |
492-2180 |
211-302.3 |
282-633 |
140.6-253.1 |
6.3-10.5X10-5 |
2.6-3.3 |
|
Stone varety
