Modified Asphalt GB 030
Overview
GB 030 Modified Pitch represents a standardized grade of coal tar pitch modified through controlled oxidation processes under China's GB/T 2290 specifications. This industrial material originates from coal tar distillation residues that undergo thermal treatment to enhance specific performance characteristics. The '030' designation refers to its standard classification within China's national material system, indicating particular quality benchmarks for softening point, viscosity, and insolubles content. As a strategic material in heavy industries, modified pitch serves as a cost-effective alternative to petroleum-derived binders. Its modification process adjusts molecular weight distribution, increasing the concentration of beneficial mesophase components while reducing volatile matter. Manufacturers typically produce it in bulk quantities, with shipping formats ranging from solid blocks to molten delivery for large-scale industrial consumers.
Physical and Chemical Properties
The material exhibits temperature-dependent rheology, transitioning from brittle solid to viscous liquid as temperature exceeds its softening point (typically 90-110°C). Its complex chemical composition primarily consists of polycyclic aromatic hydrocarbons (PAHs) with varying degrees of alkyl substitution. Key quality indicators include toluene insolubles (TI) content (18-28%) and quinoline insolubles (QI) content (6-12%), which influence binding performance. Thermogravimetric analysis shows excellent carbon yield of 55-65% at 800°C, making it valuable for carbon product manufacturing. The material demonstrates low electrical conductivity in solid state but becomes moderately conductive when carbonized. Its penetration index (PI) typically ranges from +2 to +4, indicating favorable temperature susceptibility for industrial applications. Oxidation stability tests reveal minimal weight loss below 200°C under atmospheric conditions.
Main Applications
In aluminum production, GB 030 Modified Pitch serves as the primary binder for carbon anodes, providing essential cohesiveness during forming and baking processes. Its optimized viscosity ensures uniform distribution around petroleum coke particles while withstanding electrolytic cell temperatures exceeding 900°C. The metallurgical industry utilizes approximately 60% of production output. Refractory manufacturers employ this material as an impregnation agent for magnesia-carbon bricks, enhancing their thermal shock resistance in steelmaking ladles. Road construction applications account for about 20% of consumption, where its modified rheology improves pavement durability in high-temperature climates. Emerging applications include carbon fiber precursor production and lithium-ion battery anode materials, where its high carbon yield and mesophase content prove advantageous.
Safety and Storage
As a combustible material with flash point around 200°C, modified pitch requires storage away from ignition sources in well-ventilated areas. Thermal decomposition above 300°C may release hazardous fumes including benzene, naphthalene, and other PAHs. Facilities should equip storage tanks with nitrogen blanketing systems when maintaining molten product. Personnel handling solid pitch should use heat-resistant gloves and eye protection due to potential hot material splashes during melting operations. Respiratory protection becomes necessary when processing generates dust or fumes. Spill containment measures should include non-combustible absorbents like vermiculite, never water due to risk of steam explosions. Firefighting requires dry chemical or foam extinguishers, as water application may spread burning material.
B2B Procurement Guide
Industrial buyers should specify critical parameters including softening point (typically 100±5°C for standard grade), TI/QI content, and ash content (<0.5% for premium grades). Bulk procurement contracts often include viscosity-temperature profile requirements for pumping and mixing operations. Quality certifications to check include GB/T 2290-2012 compliance and third-party analysis reports. Leading Chinese producers cluster in Shanxi and Hebei provinces, with production capacities ranging 50,000-300,000 tons annually. Minimum order quantities typically start at 20-ton truckloads for solid pitch or 50-ton tanker deliveries for molten product. Buyers should verify supplier capabilities for customized modifications like increased mesophase content or adjusted rheological properties. Payment terms commonly involve 30-50% advance with balance upon delivery inspection.
Related Manufacturers
- 主营：高温沥青粉、石油沥青片、煤沥青片、国标改质沥青、国标中温沥青、燃料油、高温煤焦油、蒽油、高温颗粒、高温块、石油沥青
- 主营：煤沥青、中温沥青、高温沥青、改质沥青、国标煤沥青、球沥青、沥青粉、树脂沥青片、石油沥青、固体 液体、炭黑油、煤焦油沥青
- 主营：硫铝酸盐水泥、堵漏剂、铝酸盐水泥、高铝水泥、速凝剂、灌浆料、锚固剂、高铝浇注料、耐火水泥、堵漏王、道路修补料、耐酸水泥、水玻璃、树脂锚固剂、注浆料、速凝剂母料、液体速凝剂、高水注浆料、耐火浇注料、快硬硫铝酸盐水泥、低碱度硫铝酸盐水泥、52.5硫铝酸盐水泥、环氧树脂砂浆、耐酸胶泥、超细水泥
- 主营：煤沥青、高温沥青、沥青粉、国标改质沥青、国标中温沥青、改质沥青、中温沥青、球沥青、煤焦沥青、煤沥青片、液体沥青、石油沥青、高温沥青块、沥青块、沥青片、石油沥青片、沥青漆、蒽油、煤焦油、炭黑油、中温沥青液、环氧煤沥青漆、改制沥青、煤沥青块
- 主营：增碳剂、煅烧焦、石墨化焦、改质沥青、摩擦材料焦炭粉、摩擦材料合成石墨、沥青焦、球铁增碳剂、灰铁增碳剂、石墨增碳剂、半石墨增碳剂、负极用石油焦、负极用针状焦、特碳用沥青焦、针状焦、铸造增碳剂、高温石墨增碳剂、煅后石油焦、负极用沥青焦、负极材料电阻料、负极材料用保温料
- 主营：高温沥青、球沥青、沥青粉、国标改质沥青、国标中温沥青、石油沥青片、聚酯沥青块、浸渍沥青、煤沥青、沥青片
- 主营：中温沥青、高温沥青、沥青粉、改质沥青、沥青片、煤沥青
- 主营：煤沥青、高温沥青、中温沥青、国标改质沥青、国标中温沥青、沥青粉、球沥青、恒力石油片、煤沥青片、液体沥青、石油沥青、烧火油
- 主营：颗粒沥青、片状沥青、焦粉、改质沥青、焦炭、高温沥青、中温沥青、沥青粉、球沥青、焦油、蒽油、洗油、炮泥油、煤沥青、沥青块
- 主营：煤焦油、高温沥青、防水材料、改质沥青厂家、低温沥青、改制沥青、球状沥青、石油沥青、中温沥青、环氧沥青漆
- 主营：国 标改质沥青、中温沥青
- 主营：煤沥青、高温沥青、中温沥青、国标改质沥青、国标中温沥青、国标煤焦油、高温煤焦油、石油沥青、沥青粉、蒽油、炭黑油、沥青漆
- 主营：高温沥青、中温沥青、改制沥青、国标沥青、高温沥青粉、恒力片、石油沥青、石油沥青片、煤沥青片、沥青粉、沥青快、耐高温沥青块、煤沥青、高温改制沥青、燃料油、烧火油、10号石油沥青、高温块、中温块、高温沥青块、液体沥青、沥青颗粒、固体沥青、中温沥青厂家
- 主营：粘结剂、液体沥青、中温沥青、国标沥青、改质沥青、煤沥青粉、球沥青、活性炭、高温煤沥青、高温沥青、高温煤沥青颗粒、石油沥青、碳素阳极、石墨电极、预焙阳极、石墨制品、石墨坩埚、耐火材料、防水涂料、高功率电极棒、碳素厂黏结剂、玻璃钢防腐涂料、电解铝、防水材料、电极糊
- 主营：改质煤沥青、高温煤沥青、中温煤沥青、国标改质沥青、国标中温沥青、低温煤沥青、沥青粉、树脂片沥青、石油片沥青、液体沥青、固体沥青、煤沥青