Products

Limestone Vietnam

Dong Son Manufacturer is very confident to be a reputable company in Vietnam, supplier of Limestone and Construction Stone, Clinker and Cement Vietnam at high quality and reasonable price. On recent years, we have exported a big quantity of each product at high quality and get the satisfaction of many customers.
Limestone has numerous uses: as a building material, as aggregate for the base of roads, as white pigment or filler in products such as toothpaste or paints, as a chemical feedstock for the production of lime, or as a popular decorative addition to rock gardens.

We have 5 kinds of limestone:
1. Big Limestone lumps
2. Granular limestone for feed grade
3. Limestone rude size powder
4. Limestone for Cement Clinker
5. Limestone for Steel

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We are currently supply a huge quantity of Limestone at the standard quality as belows:
Chemical Properties:

NO.  SPECIFICATIONS  SUPPLIER STANDARD
REQUIREMENT  STANDARD GRADE 
1 CaO 52% Min 53 % Min
2 SiO2 0.55 % Max 0.8% Min
3 MgO 0.65 % Max 0.8% Max
4 Al2O3 0.17 % Max 0.2% Max
5 Fe2O3 0.14% Max 0.2% Max
6 Na2O 0.035% Max 0.05% Max
7 K2O 0.01% Max 0.025 Max
8 LOI 43% Min 41.5% Min
9 Size 0-20mm – 20-80 mm ok
10 Load Port Cam Pha Port // Quang Ninh Province VN
11 Arrangement Good Arrangement // Shipper agency
12 NOR NOR in Day & Night // NOR Tender after 12h
13 Loading rate Loading rate at 7000 MT PWWD
14 Draft issue Draft restriction at 13.5m // actual depend on tide of day
15 Supply/Month 30.000 – 50.000MT
16 FOB Price

Regarding product packing and loading,we also do safe way.We have rich experienced and professional team to handle product packing,space availability and stacking in container,ensure that the goods you receive and you expect are same.
Packing detail:
1. Inner packing: Cartons or foamed plastics (polystyrene).
2. Out packing: Seaworthy wooden crated with fumigation.
Delivery detail:
1. Delivery time :15 days after the order confirmed.
2. Port loading: Cam Pha, Quang Ninh, Vietnam.

Fly Ash use in Cement Industry

Fly Ash use in Cement Industry – (Class F) ASTM-C618 – Flyash use for cement industry – ≤1 %. ≤8 %
Supply Quantity: 12.000 Tons /Months
Min Order Quantity: 2.000 Tons
Fob Only – Port: Nghi Son, Hai Phong, Cam Pha in Vietnam
Payment: LC/TT

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Cement with Fly Ash

Fly ash is recovered in the form of a fine dust by the dust collectors of furnaces burning pulverized coal. Fly ash may be siliceous (consisting mostly of eactive silicon dioxide (SiO2) and aluminium oxide (AI2O3) with pozzolanic properties) or calcareous (consisting of reactive calcium oxide (CaO), reactive silicon dioxide (SiO2) and aluminium oxide (AI2O3 ) and having both pozzolanic and hydraulic properties) and is consequently serves as a suitable alternative raw material. Since the reaction of pozzolanic material is slower than that of clinker, cements containing fly ash typically show a lower early strength compared to ordinary Portland cement (OPC) at similar fineness. They also exhibit a lower water demand, an improved workability, a higher long-term strength and – depending on the application – a better durability such as an increased resistance against sulfate attack. In addition, fly ash can often contain higher amounts of unburned carbon affecting their suitability for cement and concrete.

We are offering fly ash etc. Our organization in engaged in providing fly ash, which makes the concrete durable, stronger and resistant to chemical attack. Residue material such as fly ash and bottom ash are produced by power plants.

Bulk Cement

We utilize the modern technology lines & materials in the best way. Long Son Clinker & Cement Products have high quality, content of hazardous impurities such as MgO & total low alkalinity (R2O). Our products meet all the most severe technical requirements of Vietnam standards & International Standards ASTM, BS EN.

Advantages of Long Son Industrial Cement Products PC50 & PCB 40: Having an excess of high grade and stable quality. Therefore, by using Longshan Cement Products, the concrete mixing plants will save the amount of used cement and stable-quality concrete products in accordance with design standards.

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  • PC50 & PCB40 Industrial Long Son Cement has high early strength (R3 & R7), which enables to push up the construction progress and save construction costs.
  • Time for cement setting process of Long Son Cement products are prolonged, which ensures time to deliver the commercial concrete to the far projects.
  • The content of free lime & low MgO in the cement is low (<1%), therefore, its volume isn’t expanded after construction and there’s no cracking phenomenon of concrete products using Long Son cement after being taken into use.
  • Total R2O alkali content in cement is very low (<0.5%) , which eliminates the causes of corrosion & demolition of concrete structure and increases the sustainability of concrete.

         Specification:

No. Characteristic  Units Typical Test result          TCVN 2682:2009 PC 50 specified
01 Fineness
Speunitcific surface cm2/g 3750 Min. 2800
0.09mm residue % 0.5 Max. 10
02 Soundness mm 1.40 Max. 10
 Le Chatelier test (Le Chaterlier)
03 Standard Consistence % 27.4
04 Setting time
Initial set min 160 Min. 45 min
Final set min 180 Max. 420 min
05 Compressive strength
03 days N/mm2 30.5 Min. 25
28 days N/mm2 57.0 Min. 50
06  (Magnesium oxide – MgO in cement ) % 1.00
07 S03 content % 2.30 Max. 3.5
08 Free-CaO  % 0.60