Overview
GB 10# Asphalt is a petroleum-derived bitumen classified under China's national standard (GB/T 15180). It is characterized by a penetration grade of 10, indicating its medium-hard consistency at room temperature. This type of asphalt is primarily produced through vacuum distillation or oxidation of crude oil residues. Widely recognized for its balance of durability and workability, it serves as a cost-effective binder in infrastructure projects. The '10#' designation reflects its standardized performance metrics, ensuring consistency across industrial applications.
Physical and Chemical Properties
GB 10# Asphalt exhibits a penetration value of approximately 10 (0.1mm at 25°C, 100g, 5s), with a softening point typically ranging between 95-110°C (Ring-and-Ball method). Its ductility exceeds 100cm at 25°C, demonstrating excellent flexibility. The material is chemically stable under ambient conditions but may oxidize when exposed to prolonged UV radiation or high temperatures. Its rheological properties make it suitable for moderate-temperature climates, where it resists cracking in cold weather and deformation in heat.
Main Applications
Over 70% of GB 10# Asphalt is consumed in road construction as a binding agent for aggregates in asphalt concrete. It is particularly suited for base course layers in highways and urban roads due to its optimal viscosity-temperature relationship. Secondary applications include waterproofing membranes for buildings, anti-corrosion coatings for pipelines, and soundproofing materials in automotive industries. Some specialty uses involve modified versions with polymers for enhanced performance in extreme conditions.
Safety and Storage
As a combustible material, GB 10# Asphalt requires storage tanks or drums to be placed away from open flames, with recommended maximum stacking heights of three layers. Workers should wear heat-resistant gloves and VOC masks during hot processing (160-180°C). Spill containment measures must include sand or inert absorbents, as water may spread the material. Long-term storage below 50°C prevents premature aging, with shelf life typically exceeding 12 months in sealed containers.
B2B Procurement Guide
When sourcing GB 10# Asphalt, verify supplier certifications including ISO 9001 and GB/T 15180 compliance reports. Key procurement metrics should include penetration index (+/-1), loss on heating (<0.5%), and solubility in trichloroethylene (>99%). Bulk purchases (minimum 20-ton tankers) often reduce costs by 15-20% compared to drum shipments. Consider seasonal demand fluctuations—prices tend to rise during peak construction months (April-October in temperate regions). Always request third-party laboratory test reports for each batch.
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