The physical-mechanical behavior and chemical bonding nature of poly-N-vinylpyrrolidone modified cement concrete
Shamo Z. Tapdiqov,
Elvin Y. Malikov,
Seadat F. Humbatova,
Fariz F. Ahmed,
Sevda Sh. Kazımova,
Ayaz M. Gulamirov,
Samire M. Mammadova,
Jamila E. Guliyeva
Affiliations
Shamo Z. Tapdiqov
SOCAR Oilgasresearchproject Institute, Azerbaijan; Corresponding author.
Elvin Y. Malikov
Faculty of Chemistry, Baku State University, Azerbaijan
Seadat F. Humbatova
Nanostructured Metal-polymer Catalysts, Institute of Catalysis and Inorganic Chemistry, Azerbaijan Republic Ministry of Science and Education, Azerbaijan
Fariz F. Ahmed
SOCAR Oilgasresearchproject Institute, Azerbaijan
Sevda Sh. Kazımova
SOCAR Oilgasresearchproject Institute, Azerbaijan
Ayaz M. Gulamirov
Department of Nuclear Spectroscopy and Radiochemistry, National Nuclear Research Centre, Azerbaijan
Samire M. Mammadova
Nanostructured Metal-polymer Catalysts, Institute of Catalysis and Inorganic Chemistry, Azerbaijan Republic Ministry of Science and Education, Azerbaijan
Jamila E. Guliyeva
Nanostructured Metal-polymer Catalysts, Institute of Catalysis and Inorganic Chemistry, Azerbaijan Republic Ministry of Science and Education, Azerbaijan
In this study, the various amounts of poly-N-vinylpyrrolidone (PVPr) were added to the cement paste, and some parameters - flowing, initial and final setting points, water absorption, compressive strength, and flexural strength were determined. The concrete containing 0.8% PVPr exhibited high water absorption, specifically, at 14 and 28 days, increased from 15.65% to 20.71% and from 16.74% to 21.67%, respectively. The final setting time increased from 238 min to 261 min. It was determined that the compressive strength of the cement mortar increased from 54.8 MPa to 58.5 MPa when the PVPr content was 0.8–1.0%. The flexural strength also improved due to the presence of PVPr, increasing from 11.58 MPa to 14.27 MPa. According to the FTIR characterization, the PVPr macromolecule interacts with Ca2+ and Al3+ ions. TGA analysis reveals that the chemical interaction of PVPr with calcium and aluminum ions limits its mass loss up to 4–5% until 400 °C.
