TRADING
DTST Corp began trading journey as a trading team with limestone products, a subcontractor transporting coal mines and transporting other domestic goods, exporting cement and other raw materials... Over the years, our company has developed reliable trading partners in the coal and cement industry thanks to our stable and long-term performance. A firm foothold in the core businesses of us have allowed our company as we explore new markets, special markets, expanding into finishing products, energy and modern agriculture, products of construction and building.
Major import and export products:
- Iron ore and steel, equipments and machinery (including over sized and over weight devices),
- Cement and clinker,
- Coals,
- Lime and limestone products,
- Agricultural products.
With core values are:
+ Excellence Quality: We always try our best to bring the best quality products and services in time;
+ Intergrity: Always strive to gain the trust of all partners and customers, create trust in the community;
+ Professional: Standardize in all activities to serve customers in the most effective way, improve business efficiency;
+ Innovation: Always innovating, being creative in work and technology to bring the best products and services to customers;
+ Carring: We always take care of our customers in a dedicated and thoughtful way so that customers are always satisfied with the products and services we provide.
Ensuring good implementation of commitments with reputable buyers and sellers has made DTST Corp a well-known name in the bulk trading market. With the ability to meet the requirements of trade, is committed to working with our reputable buyers and sellers who have turned DTST Corp. become a famous name in the market with a large number of trading.
In addition to the above main items, we have successfully developed many other cargo/goods with different routes around the world.
CEMENT &CLINKER
Before the year 2015, the main market for clinker in Vietnam is Bangladesh and trading by Hongkong/ Singapore buyers with discharging ports: Chittagong and Mongla port only.
From end of the year 2015, we provide additional services to the Malaysia and Philippines buyers for the products of cement as clinker and cement in bags.
And end of the year 2017 upto now the mainly of our market is China, Philippines, Malaysia, Bangladesh with the products:
- GREY CLINKER (CEMENT CLINKER)IN BULK:
Suitable for the productions of Portland cement according to ASTM C150 Type I (or Common Portland Cement 52.5; or CEM I PC50; or P.O 52.5)
- CEMENT PRODUCTS IN BULK OR IN BAGS (40kg – 50kg – 1000kg – 1500kg – 2000kg) as grades:
- ASTM C150 Type I / CEM I 5N (or Common Portland Cement 52.5; or CEM I PC50; or P.O 52.5)
- CEM II/ A-M 42.5R/N
- CEM II/A-L 32.5R/42.5N
- PCB40/ PCB30
- CEM III/A (Blast furnace Cement)…
Specification of clinker in bulk:
|
Specification Grey Cement Clinker conforms to ASTM C150 Type I |
||||
|
Chemical Analysis |
||||
|
Silicon dioxide |
(SiO2) |
Min |
20.00 |
% |
|
Aluminum oxide |
(Al2O3) |
Max |
6.50 |
% |
|
Ferric oxide |
(Fe2O3) |
Max |
4.60 |
% |
|
Calcium oxide |
(CaO) |
Min |
65.00 |
% |
|
Magnesium oxide |
(MgO) |
Max |
3.00 |
% |
|
Sulfur trioxide |
(SO3) |
Max |
0.80 |
% |
|
Loss on ignition |
(LOI) |
Max |
1.00 |
% |
|
Insoluble residue |
(IR) |
Max |
1.00 |
% |
|
Free lime |
(f-CaO) |
Max |
1.50 |
% |
|
Total alkalis |
|
Max |
0.80 |
% |
|
Tricalcium silicate |
(C3S) |
Min |
55.00 |
% |
|
Dicalcium silicate |
(C2S) |
Max |
25.00 |
% |
|
Tricalcium aluminate |
(C3A) |
Max |
12.00 |
% |
|
Lime saturation factor |
(LSF) |
Min |
91.00 |
% |
|
NA2O3 |
Max |
92.00 |
% |
|
|
K2O3 |
Max |
93.00 |
% |
|
|
Chlorid |
Max |
94.00 |
% |
|
|
C4AF |
|
9-12.00 |
% |
|
|
Specification of Portland Cement ASTM C150 Type I / CEM I 52.5N (or Common Portland Cement 52.5; or CEM I PC50; or P.O 52.5) |
||||
|
No |
Technical Specification |
Unit |
Test methods |
Technical requirements |
|
1 |
Compresive strength |
|
EN 196-1 |
|
|
- 3 days |
N/mm2 (Mpa) |
≥ 21.0 |
||
|
- 28 days |
N/mm2 (Mpa) |
≥ 52.5 |
||
|
2 |
Setting time |
|
EN 196-3 |
|
|
- Initial |
Minute |
≥ 45.0 |
||
|
- Final |
Minute |
≤ 375.0 |
||
|
3 |
Finess |
|
EN 196-6 |
|
|
Specific surface |
cm2/g |
≥ 2800.0 |
||
|
4 |
Soundness |
|
EN 196-3 |
|
|
(Method: Le chatelier) |
mm |
≤ 10.0 |
||
|
5 |
Anhydric sulfuric (SO3) |
% |
EN 196-2 |
≤ 4.0 |
|
InsollubleResidue (IR) |
% |
≤5.0 |
||
|
Loss on Ignition (L.O.I) |
% |
≤5.0 |
||
|
6 |
Chloride content (Cl) |
% |
EN 196-21 |
≤0.1 |
LIMESTONE PRODUCTS
We exporting all kinds of stones and products made from stone like: white stone, hydrated limes ...
Loading port: Quang Ninh anchorages port.
Quantity of shipment: 30,000 upto 55,000 mts
Quality/Specifications:
- CaO: Min 52.00 %
- CaCO3: Min 85.00 %
- Moisture: Max 1%
- MgO: Max 1,5%
- SiO2: Max 0,5%
- P: Max 0,01%
- S: Max 0,035%
- Broken, below size 5mm: Max 1%
Quantity/quality inspection certificate by SGS Vietnam
