(Urgent) Under the guidance of experts, what are the main differences between hard asphalt and modified asphalt?

If there is a difference, please check the previous posts. I have posted them many times.

Hard asphalt has a higher softening point and is hard and brittle, so it is called hard asphalt. Mainly used as binder, fuel and chemical raw material (gas production and ammonia production) for "coal coking". Modified asphalt 1. The definition of this term, also known as modified asphalt, is made from medium-temperature asphalt as raw material. The benzene insoluble content BI of ordinary medium-temperature asphalt is about 18%, and the quinoline insoluble content QI is about 6%. When this kind of asphalt is heat treated, the aromatic hydrocarbon molecules in the asphalt produce hydrogen, methane and water during the thermal polycondensation process. At the same time, part of the original β resin in the asphalt is converted into secondary α resin, and part of the benzene solution is converted into β resin. The α component increases, the adhesiveness increases, and the asphalt is modified. This kind of asphalt is called modified asphalt. 2. A brief introduction to the character and situation of the noun. Modified asphalt is a black solid at room temperature, with a softening point of 110°C. 3. The processing technology of this product. The modified asphalt produced by the thermal polymerization method uses medium-temperature asphalt as raw material, which is continuously pumped into a reaction kettle with stirring. After a heating reaction, small molecular gases are precipitated, and the kettle liquid is the electrode asphalt. The heavy residual oil upgrading and refining comprehensive process method can produce modified asphalt of any grade with a softening point of about 80°C and a β-resin of more than 23%. The yield is 10% higher than that of the thermal polymerization method. This method is to pressurize the dehydrated tar in the reaction kettle to 0.5-2Mpa, heat it to 320-370°C, and keep it for 5-20 hours, so that the useful components in the tar, especially the heavy oil components, and the low-boiling-point unstable heterocyclic components, are polymerized in the reaction kettle and converted into asphaltenes, thereby obtaining the best quality modified asphalt. 4. Purpose Modified asphalt is used in the production of prebaked anode blocks in the electrolytic aluminum industry ； It can also be used as an electrode binder.

Thank you, 520OII. Regarding the softening point, I saw that the index of Cobos is also between 108-112. It is not higher than the modified one? I feel that the main difference is that QI, TI, etc. are different as you said. In terms of price, will the hard one be more expensive? KOPPERS online index, hard to sort out the softening point°C softing point108-112ASTM D 3104 Toluene insoluble matter% TI %≥ 20%ISO 6376 Quinoline insoluble matter QI %4-10ASTM D 2318b - Resin% b -resins%≥ 15% Coke value % ACV%≥ 54%ASTM D 4715 Ash% ASH%≤ 0.5%ASTM D 2415 Density 15.5 ° C SG15.5≥ 1.290ASTM D 2320 Volatile content% volatility%≤ 4%ASTM D 4893 Sulfur content% sulpfur%≤ 0.9%KOPPERS MOT 115

http://bbs.hcbbs.com/viewthread.php?tid=149815 Production and Application of Petroleum Asphalt http://bbs.hcbbs.com/viewthread.php?tid=93417 Analysis of China's asphalt and modified asphalt market conditions http://bbs.hcbbs.com/viewthread.php?tid=54959 Asphalt research materials http://bbs.hcbbs.com/viewthread.php?tid=274956 A brief discussion on the processing and utilization of coal pitch has a very detailed introduction and explanation. I believe there are many things you need.

There is not much difference between these two kinds of asphalt from the test sheet. If you want to conduct a more in-depth analysis, the connotation will be different.