HT VIETNAM INVESTMENT & DEVELOPMENT JSC.

Hoạt động xuất khẩu (EXP)


Hoạt động xuất khẩu

Hoạt động xuất khẩu (EXP) - HT Blue Limestone

HT Blue Stones

Limestone is calcareous sedimentary rocks formed at the bottom of lakes and seas with the accumulation of shells, bones and other calcium rich goods. It is composed of calcite (CaCO3). The organic matter upon which it settles in lakes or seas, are preserved as fossils. Over thousands and millions of years, layer after layer is built up adding weight. The heat and pressure causes chemical reaction at the bottom and the sediments turn into solid stone, the limestone.

The rock which contain more than 95% of calcium carbonate is known as high-calcium limestone. Recrystallised limestone takes good polish and is usually used as decorative and building stone.

Limestone that will take a polish are considered marbles by most people, but technically, if there are still shells visible or the structure is not crystalline, it is still a limestone.

Physical Properties

Physically, HT Limestones are quite impervious, hard, compact, fine to very fine grained calcareous rocks of sedimentary nature.

 

Brightness (polished)

Equivalent to natural marble or granit, polished or honed

Chemical Resistance

Unaffected

Color Resistance to Light

No change in Brightness or Color

Compressive Strength

993 g/cm3 ~ 97.38 N/mm2

Frost Resistance

Frost proof

Hardness

3 to 4 on Moh's Scale

Moisture Content

0.06 %

Natural Density

2.67 g/cm3

Porosity

1.23 %

Thermal Shock

Resistant

Skid Resistance

Resistant

Specific Gravity

 2.7 g/cm3

Stain Resistance

Resistant

Water Absorption

0.08 %

Weather Impact

Resistant 

Chemical Properties

Chemically, they are calcareous rocks principally of calcic minerals with minor amounts of alumina, ferric & alkaline oxides.

 

Lime (CaO)

46.22 %

Silica (SiO2)

15-18%

Alumina (Al2O3)

3-5%

MgO

2.6 %

FeO + Fe2O3

1-1.5%

Alkalies

1-1.5%

Loss On Ignition (LOI)

39.30 %

Insoluble Solids

2.26 %

SO3

0.08 %

Cl-

0.036 %

Note :- Limestone, like marble and other calcareous stones, are referred to as acid sensitive. Calcareous stones are readily dissolved in acid, therefore acidic products should not be used on limestone and marbles.

Uses of HT Blue Stone

·         Flooring

·         Wall cladding & installations

·         Vanity tops

·         Furniture & sculpture

·         Cement production

·         Refining metals

·         Blackboard chalk

 

      Quarries of HT Blue Stone

      Ngoc Lac district, Thanh Hoa province, Vietnam

Download specs file

Back to Building Materials

 
 

Categories