Import Asphalt Antistripping Agent — Buy in Bulk from Supplier in China

Hangzhou Ray Concrete Admixture Inc. supplies HW-7, a non-cationic, non-amine asphalt antistripping agent designed to improve adhesion between asphalt binder and aggregate in moisture-prone environments. The product is described as heat-resistant and aging-resistant, with an environmentally friendly formulation that avoids the corrosive handling issues associated with traditional amine-based agents. The HW-7 designation suggests a proprietary formulation, though the active chemistry (whether silane, zwitterionic, or polyamine-free surfactant blend) is not disclosed. Typical antistripping agents function at dosage rates of 0.25-0.50 percent by weight of asphalt binder, though the supplier does not state a recommended dosage range.

The non-cationic, non-amine classification is significant for buyers handling sensitive aggregates or working in regions with strict effluent regulations. Amine-based agents can cause environmental compliance challenges and aggregate discoloration; HW-7 avoids these issues while maintaining stripping resistance. The product's compatibility with various asphalt types (implied to include both unmodified and polymer-modified binders) depends on its HLB value and solubility parameter matching. Typical antistripping agents must demonstrate a retained coating area above 80 percent per ASTM D4867 (boiling water test) or T283 tensile strength ratio above 80 percent after moisture conditioning. The supplier does not provide these standard performance metrics.

Primary applications include highway construction, airport pavements, bridge deck surfacing, and road maintenance in humid subtropical or monsoon climates where moisture damage is prevalent. The product targets contractors and asphalt mix producers requiring export-grade admixtures with flexible order quantities. Payment terms mentioned include L/C and T/T, though specific advance ratios, delivery terms, or minimum order thresholds are absent from the source. Buyers should confirm the exact dosage rate, compatibility with their base asphalt source, and whether technical support for mix design optimization is provided.

Hangzhou Ray Concrete Admixture Inc. is located at Room 906, Building 1, Lvdu Bairui Square, Xet, Hangzhou, 311215, Zhejiang Province, China. The supplier holds an Imported supplier tier and Harbor trust tier, with a 0.00 percent response rate and no recorded average response hours. The company operates from Hangzhou, a hub for China's specialty chemical and construction materials industries, suggesting access to formulation expertise and raw material supply chains for concrete and asphalt admixtures.

The source description contains no information about manufacturing facility certifications (ISO 9001, ISO 14001), quality control laboratories, patent holdings for the HW-7 formulation, or reference projects. There is no stated production capacity, R&D staff size, or export experience to specific markets. The product description uses platform placeholder branding that has been disregarded per content policy. Buyers should independently verify the company's manufacturing capabilities, request a factory audit or third-party inspection, and confirm whether Hangzhou Ray Concrete Admixture formulates HW-7 in-house or contracts production.