Import Concrete Silica Fume — Buy in wholesale FOB from Supplier in China
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Concrete Silica Fume
Concrete Silica Fume supplied by Quanzhou Winitoor Industry Co., Ltd. is an amorphous silicon dioxide (SiO2) microsilica powder used as a pozzolanic additive in concrete mixes. The material provides high‑purity microsilica content that significantly enhances density, compressive strength and long‑term durability of concrete. It is particularly valued for marine structures, bridge decks and high‑strength precast elements where performance specifications are stringent.
Typical commercial silica fume contains at least 95 % SiO2 and a specific surface area around 20 000 m² kg⁻¹, both of which drive pozzolanic activity. Moisture content is usually kept below 1 % to preserve reactivity, and bulk density ranges from 0.5 to 0.7 g cm⁻³. Particle size distribution is centred on a median diameter of 0.1‑0.2 µm, allowing the powder to fill voids in the cement matrix. Suppliers commonly ship the product in 20 MT flexible intermediate bulk containers (FIBCs) or 25 kg paper sacks.
Readymix plants, precast manufacturers and infrastructure contractors are the main buyers of this additive. Quanzhou Winitoor Industry offers both bulk and bagged supply, and buyers should confirm the preferred packaging, FOB terms and the letter of credit payment method with the supplier. The company states that its silica fume complies with ISO and SGS quality standards, but exact certification documents should be requested before contract finalisation.
| Material | Amorphous Silicon Dioxide (SiO2) Microsilica |
| Purity | High‑purity microsilica (typical ≥ 95 % SiO2) |
| Specific Surface Area | Typical 20 000 m² kg⁻¹ |
| Moisture Content | Typical < 1 % |
| Bulk Density | Typical 0.5 - 0.7 g·cm⁻³ |
| Median Particle Size | Typical 0.1 - 0.2 μm |
| Packaging Options | 20 MT FIBC or 25 kg sacks |
| Standard Compliance | ISO and SGS certified (supplier‑claimed) |
Quanzhou Winitoor Industry Co., Ltd. is located at Rm#801, No. 3 Building, Jialin Square, Ruixiang Garden, Citong Road, Quanzhou 362000, Fujian, China. The supplier is listed as an imported tier with a harbor trust level, indicating that the company has been verified through third‑party checks. Its response statistics show no recent replies, so communication speed may need to be confirmed directly.
The company markets concrete silica fume in bulk or bagged form and highlights compliance with ISO and SGS standards as part of its quality assurance. Shipping is arranged on a FOB basis, and the supplier mentions flexible minimum order quantities to suit different project sizes. No additional corporate history, employee numbers or client references are provided in the listing.
Silica fume is a high-performance pozzolanic additive widely used in concrete and shotcrete applications to significantly improve density, compressive strength, and long-term durability including corrosion and chemical resistance. This supplementary cementitious material is particularly valued in marine structures, bridge decks, and high-strength precast concrete where performance specifications are stringent. As a global trade commodity in bulk or bagged form, it is sourced from ferrosilicon and silicon metal production facilities worldwide, with leading suppliers in Norway, the United States, and China, and typically shipped in 20 MT flexible intermediate bulk containers (FIBC) or 25 kg sacks to construction material importers and readymix plants.
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Sourcing Concrete Silica Fume from Quanzhou Winitoor Industry Co., Ltd. - China Import Guide
Before placing an order, importers should obtain a recent chemical analysis report that confirms SiO2 purity, specific surface area and moisture content. Request the supplier’s ISO and SGS certificates and verify that the testing laboratory is accredited. It is also advisable to ask for a sample batch to evaluate workability and compatibility with the intended cement type.
Quanzhou Winitoor Industry ships the silica fume on a FOB basis from ports in Fujian, typically using 20 MT FIBCs or 25 kg sacks. Buyers should confirm the estimated loading time, vessel schedule and any port handling fees. Payment is usually made by irrevocable L/C, but the exact terms should be negotiated and documented in the sales contract.
During production, the supplier conducts particle‑size distribution and moisture tests in accordance with standard methods; importers are encouraged to arrange a third‑party inspection at the factory before shipment. The final shipment should be accompanied by a Certificate of Analysis, a Material Safety Data Sheet and the ISO/SGS certificates referenced earlier. Retaining these documents facilitates customs clearance and downstream quality assurance.
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30 suppliersBuy Concrete Silica Fume in Bulk — Verified Supplier in China
When sourcing Concrete Silica Fume for your business, securing the right balance of quality and cost is essential. Quanzhou Winitoor Industry Co., Ltd., a verified supplier based in China, offers this product with key specifications including Densified or Undensified Silica Fume, typically Class A or Class C per ASTM C1240, SiO2 content 85% - 98% by mass, Loss on Ignition (LOI) < 6%, and Median particle diameter 0.1 - 0.5 microns; individual particles below 1 micron. By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $100150/Bags and manage bulk orders with a minimum order quantity (MOQ) of 1 Bags. This product is actively traded under HS Code 2811.22, making it a staple in the Construction Materials sector with strong demand from importing countries worldwide.
Concrete Silica Fume Specifications, Trade Terms & Pricing
Importing Concrete Silica Fume requires careful attention to shipping logistics, customs compliance, and secure payment terms. Quanzhou Winitoor Industry Co., Ltd. offers flexible shipping options such as Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. To ensure a smooth transaction, buyers should verify import duties for HS Code 2811.22 in their destination country. Common payment methods for international B2B transactions include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P). All transactions and RFQs are facilitated through EximNext, a leading online B2B marketplace designed to make cross-border trade secure and efficient.
About Quanzhou Winitoor Industry Co., Ltd. — Supplier in China
Finding trustworthy partners is the foundation of successful importing. The supplier of this Concrete Silica Fume has been verified on our platform. Whether you are a distributor, wholesaler, or procurement manager, you can request a free quotation, ask for product samples, and finalize your bulk purchase with confidence. EximNext hosts thousands of verified manufacturers and exporters across 200+ countries. Explore similar products in the Construction Materials category and connect with top-tier exporters on our comprehensive B2B marketplace. Start your sourcing journey today.
Import Concrete Silica Fume — Shipping, Logistics & Customs
Importing Concrete Silica Fume requires careful attention to shipping logistics, customs compliance, and secure payment terms. Common shipping options include Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. Buyers should verify import duties for HS Code 2811.22 in their destination country. Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P).
Frequently Asked Questions About Concrete Silica Fume
What is the wholesale price of Concrete Silica Fume?
The current listed wholesale price for Concrete Silica Fume from Quanzhou Winitoor Industry Co., Ltd. is $100150/Bags on FOB terms from China. Prices may vary depending on order volume, packaging, and destination. For the most accurate bulk quote, send a direct RFQ to Quanzhou Winitoor Industry Co., Ltd. through EximNext.
What is the Minimum Order Quantity (MOQ) for Concrete Silica Fume?
The supplier, Quanzhou Winitoor Industry Co., Ltd., has set a Minimum Order Quantity (MOQ) of 1 Bags for Concrete Silica Fume. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.
What is the HS Code for Concrete Silica Fume?
For international shipping and customs clearance, Concrete Silica Fume is classified under HS Code 2811.22. Buyers should verify their local customs regulations to determine applicable import duties and taxes for this classification.
How can I import Concrete Silica Fume from China?
To import Concrete Silica Fume from China, negotiate shipping terms (FOB, CIF, or EXW) directly with Quanzhou Winitoor Industry Co., Ltd.. Ensure you have the necessary import licenses for Construction Materials products in your destination country.
Is Quanzhou Winitoor Industry Co., Ltd. a verified supplier?
Yes, Quanzhou Winitoor Industry Co., Ltd. is a verified supplier on EximNext. You can view their complete company profile, business registration details, certifications, and export history before placing a bulk order.
What are the key specifications of Concrete Silica Fume?
The key specifications for Concrete Silica Fume supplied by Quanzhou Winitoor Industry Co., Ltd. include Densified or Undensified Silica Fume, typically Class A or Class C per ASTM C1240, SiO2 content 85% - 98% by mass, Loss on Ignition (LOI) < 6%, and Median particle diameter 0.1 - 0.5 microns; individual particles below 1 micron. For a complete technical data sheet or Certificate of Analysis (COA), send an inquiry directly to the supplier through EximNext.
What packaging options are available for bulk orders of Concrete Silica Fume?
Quanzhou Winitoor Industry Co., Ltd. offers Concrete Silica Fume with standard export packaging. Custom packaging, private labeling, and OEM/ODM options may also be available for large wholesale orders.
Which countries import Concrete Silica Fume the most?
Concrete Silica Fume is actively imported by buyers worldwide. Request a destination-specific CIF or CFR quote from Quanzhou Winitoor Industry Co., Ltd. through our platform.
What certifications does this Concrete Silica Fume supplier hold?
Quanzhou Winitoor Industry Co., Ltd. maintains international quality certifications. These ensure that the Concrete Silica Fume meets international quality, safety, and regulatory standards required for cross-border trade.
How do I place a bulk order for Concrete Silica Fume on EximNext?
Click "Request Quotation" on this product page, specify your required quantity, preferred shipping terms, and destination country. Quanzhou Winitoor Industry Co., Ltd. will respond with a detailed wholesale quote including FOB pricing, lead time, and payment options.
What payment methods are accepted?
Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), Documents against Payment (D/P), and Escrow services. Confirm accepted terms directly with Quanzhou Winitoor Industry Co., Ltd..
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