Overview
Medium-Temperature Solid Asphalt compliant with Chinese GB standards is a petroleum-derived construction material with balanced viscosity and thermal stability. It meets specific softening point and penetration index requirements set by national standards, making it suitable for moderate-climate applications. As a semi-solid hydrocarbon mixture, it serves as a cost-effective binding and waterproofing agent. The 'medium-temperature' classification indicates its optimal application range between traditional 'soft' and 'hard' asphalt grades, offering versatility for industrial and infrastructure projects.
Physical and Chemical Properties
This asphalt grade typically exhibits a penetration value of 60-100 dmm at 25°C and a softening point between 45-55°C (Ring & Ball method). Its ductility exceeds 100cm at 25°C, ensuring crack resistance in pavement applications. Chemically, it contains 70-85% bitumen, 15-25% asphaltenes, and trace amounts of sulfur and nitrogen compounds. The material demonstrates excellent weather resistance and maintains stability across temperature fluctuations common in temperate regions. Its flash point exceeds 230°C, classifying it as a combustible rather than flammable material.
Main Applications
Primarily used in road construction as binder for asphalt concrete (AC-13, AC-16 mixes), it provides durable pavement surfaces for urban roads and highways. The medium-temperature grade reduces energy consumption during mixing compared to harder asphalts. Industrial applications include waterproofing membranes for buildings, anti-corrosion coatings for pipelines, and soundproofing materials. In manufacturing, it serves as a raw material for modified bitumen products when combined with polymers like SBS or APP for enhanced performance.
Safety and Storage
Store in original packaging or heated tanks below 80°C to prevent oxidation. Bulk storage requires temperature-controlled facilities with explosion-proof electrical systems due to potential fume accumulation. Workers should wear heat-resistant gloves, goggles, and respiratory protection when handling hot material. First aid measures include cooling thermal burns with water and seeking medical attention for fume inhalation. Spills should be contained with inert absorbents and disposed as hazardous waste per local regulations.
B2B Procurement Guide
Verify supplier certification for GB standard compliance (typically GB/T 494 or related specifications). Key procurement metrics include penetration index, softening point, and ductility test reports from third-party laboratories. For large projects, consider just-in-time delivery agreements with temperature-controlled tanker trucks to minimize reheating costs. Quality inspection should include sampling for solubility in trichloroethylene (minimum 99%) and loss on heating tests (max 0.5%). Negotiate pricing based on crude oil market trends and order volume.
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