Open AccessCHANGE IN THE PROPERTIES OF ASPHALT CONCRETE WHEN USING HYDROPHOBIZED MINERAL POWDER
Author(s) -
Valentina Yadykina,
Ekaterina Kuznetsova,
Mikhail Lebedev
Publication year - 2020
Publication title -
vestnik bgtu im. v.g. šuhova
Language(s) - English
Resource type - Journals
ISSN - 2071-7318
DOI - 10.34031/2071-7318-2020-5-4-17-23
Subject(s) - asphalt , asphalt concrete , materials science , grinding , saturation (graph theory) , water saturation , mineral , degree of saturation , composite number , composite material , geotechnical engineering , environmental science , metallurgy , porosity , geology , soil water , mathematics , combinatorics , soil science
One of the main factors is the structure of asphalt concrete. The most important structural component in asphalt concrete is mineral powder, the quality of which depends on the technical and operational characteristics of the road surface. Different methods of processing mineral materials are used to improve the performance of asphalt concrete in Russia and abroad. In most cases, mechanical activation with organic substances is used during the grinding process.
The article presents the results of research on the effect of treatment of mineral powder with the preparation GF-1 on its characteristics and on changes in the physical and mechanical properties of asphalt concrete, as well as on indicators for long-term water saturation.
It is shown that as a result of modification, the mineral powder becomes hydrophobic, which has a positive effect on the physical and mechanical characteristics of asphalt concrete with its use. It is found that hydrophobization of mineral powder significantly reduces water saturation and swelling; increases water resistance during long-term water saturation (up to 90 days) of asphalt concrete samples. As a result of hydrophobization, the temperature sensitivity of asphalt concrete increases significantly. Therefore, the composite will work reliably in a wider temperature range.