Factors affecting softening point include:
Water bath temperature, water bath time, test heating rate, test method, etc.
The softening point results are affected by temperature. One is the initial temperature. When the temperature is high, it has little effect on the thicker and harder asphalt, but it has little effect on the softer asphalt. The other is the heating speed. The heating speed is fast, and the result is large, otherwise it is small.
The preparation of softening point test sample is very important. Special attention should be paid to the small details in the process of mold preparation and scraping to ensure that the sample preparation meets the requirements. During the painting of the isolating agent, the isolating layer is required to neither affect the demoulding nor allow the isolating agent to occupy the space of the asphalt sample. The selection of the scraping knife and the control of the heat of the scraping knife is an empirical technology to ensure that the softening point sample after the curing of the scraping mold has no defects.