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    Shikkui Marble - Technical data

Below are some outlines of the Shikkui Marble technology.

 

Manufacturing process

A comparison of the manufacturing processes for Shikkui Marble tiles and normal tires is shown in the diagram below. As stated before, unlike regular tires, the manufacture of Limix does not involve the typical burning processes. The total energy required to produce 1 kg of the product is, thus, only 1/5 of that required to make regular tires. This results in a manufacturing process that is very environmentally friendly.

 

Shikkui Marble tile

Normal tile

Glass tile

Total energy consumed (Kcal/kg)

1,190

5,871

4,349

 

Comparison of manufacturing processes for Shikkui Marble and normal tiles

How Shikkui Marble hardens

The binding agent in Shikkui Marble, slaked lime (calcium hydroxide), reacts to carbon dioxide contained in the atmosphere to change to calcium carbonate as indicated in the chemical formula shown below. This is the same hardening mechanism (air hardening) by which traditional Japanese lime plaster, which contains slaked lime, is made.

Ca(OH)2 + CO2 → CaCO3 + H2O

By reacting to carbonization the cast becomes very dense and, thus, the physical strength of the cast body gradually increases.

 

Physical properties

Comparative table of physical properties of Shikkui Marble and some other construction materials

Test item

Specific gravity

Strength (N/mm2)

Slip resistance (BPN)

Thermal conductivity (cal/sec, cm, ℃)

Water absorption ratio (%)

Upper temperature limit (℃)

Compressive

Bending

Shikkui Marble

1.90-2.30

40

12.0

41

5.2x10-3

0.5

600

Granite

2.65

150

14.0

-

5.5x10-3

0.4

570

Marble

2.70

120

11.0

7

5.4 x10-3

0.3

600

Concrete

2.30

15-25

1.8-5.0

63

2.4x10-3

3.0

-