About Hangzhou Ray Concrete Admixture Inc. - Construction & Waterproofing Chemicals Supplier in China

Hangzhou Ray Concrete Admixture Inc. is located in Hangzhou, China and currently lists five active products in its catalogue. The company is classified as an imported supplier with a harbor trust tier. Its catalogue focuses on construction and waterproofing chemicals as well as industrial chemical additives. The product list includes sodium lignosulphonate, polycarboxylate superplasticizer, cement grinding aids, asphalt antistripping agent, and sodium gluconate. Each item is positioned for use in concrete, cement, and asphalt formulations.

Among the five items, sodium gluconate is recorded under HS code 2918.16 and is identified as the sodium salt of D‑gluconic acid (NaC6H11O7). The remaining four products fall under the broader chemical admixture segment and are commonly classified within HS chapter 38 for organic chemicals. The supplier’s top categories also reference concrete mixer and pump equipment, indicating a broader focus on concrete technology. This factual overview reflects the concrete admixture niche that the company serves.

Product Range and Specialties of Hangzhou Ray Concrete Admixture Inc.

The catalogue offers sodium lignosulphonate, a lignin‑based dispersant typically supplied with 85‑90 % purity and a moisture content below 5 %. Polycarboxylate superplasticizer is provided as a high‑range water reducer, usually achieving a water‑reduction efficiency of 20‑30 % at dosages of 0.2‑0.5 % by cement weight. Cement grinding aids are presented as organic compounds that improve mill efficiency, often characterized by a flash point above 150 °C and a particle size below 10 µm. Asphalt antistripping agents are formulated to enhance binder adhesion, commonly delivering a minimum adhesion strength of 0.7 MPa. Sodium gluconate is supplied as a crystalline powder with purity ≥99 % and is used as a set retarder or corrosion inhibitor.

Industry practice for these admixtures includes bulk shipping in 25 kg drums or 20 ft containers, with product safety data sheets accompanying each batch. Standard specifications such as ISO 9001 quality management and compliance with REACH (for the EU) are routinely required by importers.

Trade and Export Information - Hangzhou Ray Concrete Admixture Inc.

China is a major exporter of concrete admixture chemicals, and products such as those listed by Hangzhou Ray are typically shipped to construction markets in Southeast Asia, the Middle East, East Africa, and parts of Europe. The sodium gluconate entry under HS 2918.16 aligns with the chemical organic compounds category, while the other admixtures are generally recorded under HS 3824 for organic chemical products. Importers often request ISO 9001 certification, REACH registration, and where applicable CE marking for EU distribution.

Standard export logistics involve loading the admixtures into 20 ft or 40 ft containers, using moisture‑proof liners to preserve product integrity. Common Incoterms include CIF or FOB, with the choice affecting responsibility for freight and insurance. Chinese export regulations require a customs declaration with HS codes, material safety data sheets, and, for certain chemicals, an export license under the Chemical Substances Control Law.

Sourcing from Hangzhou Ray Concrete Admixture Inc. - Buyer Guidance

Buyers should request a current Material Safety Data Sheet (MSDS) and a Certificate of Analysis (CoA) that confirms purity percentages, moisture content, and any residual solvents for each admixture. For sodium lignosulphonate and polycarboxylate superplasticizer, performance test reports such as water‑reduction efficiency and slump flow are useful to validate suitability for specific concrete mixes.

Sample quantities of 1 kg to 5 kg are typical for initial evaluation, after which standard orders often start at one 20 ft container (approximately 800 kg total weight). Lead times from order confirmation to shipment range from 30 to 45 days, depending on production scheduling and export documentation. Buyers are advised to confirm packaging details, such as inner drum liners and outer palletization, to ensure safe handling during transit.

What concrete admixture products does Hangzhou Ray list?

The supplier lists five products: sodium lignosulphonate, polycarboxylate superplasticizer, cement grinding aids, asphalt antistripping agent, and sodium gluconate. Each product is targeted for use in concrete, cement or asphalt applications.

Which HS code applies to the sodium gluconate offered?

Sodium gluconate is classified under HS code 2918.16, covering sodium salts of organic acids. This code is used for customs declaration and trade reporting.

What purity levels are typical for the sodium gluconate supplied?

Industry specifications for sodium gluconate used as a set retarder generally require a purity of 99 % or higher. Moisture content is typically limited to less than 1 % to ensure consistent performance.

What certifications should a buyer verify before importing these admixtures?

Buyers should verify ISO 9001 quality‑management certification and REACH registration for EU market compliance. Where European distribution is planned, CE marking may also be required.

What documentation is recommended to request with an order?

Standard documentation includes a Material Safety Data Sheet (MSDS) and a Certificate of Analysis (CoA) for each batch. Performance test reports, such as water‑reduction efficiency for superplasticizer, should also be requested.

What are the typical packaging formats and container sizes?

The admixtures are commonly packed in 25 kg steel drums, which are consolidated into 20 ft containers for most shipments. Larger orders may use 40 ft containers, and all packaging is sealed with moisture‑proof liners.

What is the usual lead time and minimum order quantity?

Lead time after order confirmation is usually 30‑45 days, depending on production scheduling and export paperwork. The minimum order quantity is typically one 20 ft container, although sample shipments of 1‑5 kg can be arranged for trial purposes.