4. Infrared spectroscopy

The powder left after measuring of adsorption value was covered by 50 sm3 of pure benzene and agitated on a special plant for an hour. The flasks were left alone for 24 h. After that the samples were taken and the bitumen concentration was determined by photometer KFK-3 (КФК-3).

According to the amount of the powder left on the mineral powder surface, it is possible to

The conducted experiment allows to estimate the adsorption properties of the under test

mineral materials. The results of the investigations are given in the Figure 8.

Figure 8. Adsorption–desorption of bitumen on shungite and lime stone surfaces on benzene solutions.

reason about the powder surface activity.

90 Modified Asphalt

During infrared radiation passing through the substance, the excitation of molecule oscillating movement or their separate fragments takes place. It is observed that the abatement of intensity of the light passed through the sample. The absorption is not in the whole spectrum of incident radiation but only at those wavelengths the energy of which relative to the energy of excitation of oscillations in the molecules under research. Therefore, the wavelengths (or frequency) at which there is maximal absorption of infrared radiation can indicate the presence of these or those functional groups or other fragments in the sample molecular.
