Investigation of Chemical Resistance of PVC Membranes for Engineering Waterproofing

The scope of application of polymer waterproofing PVC membranes in the construction of various buildings and structures (in particular, structures of the CS-3 class) are considered. The main advantages of PVC-based polymer waterproofing membranes, such as: high uniaxial and multiaxial tensile strength, high degree of relative elongation, chemical/biological resistance, durability, etc. are briefly considered. These advantages allow the use of PVC-membranes as waterproofing and secondary protection of various reinforced concrete and concrete structures, regardless of their purpose. Chemical resistance researches of waterproofing polymer PVC-membranes have been conducted in three parts. In the first part of the research, the chemical resistance of the LOGICBASE™ membrane of the V-SL brand was evaluated on the basis of the Testing Laboratory of JSC TSNII Promzdaniy, in accordance with the requirements of GOST R 56910–2016, as well as in accordance with the requirements for the protection of concrete and reinforced concrete structures from corrosion in SP 28.13330.2017 and GOST 31384–2017. The influence of solutions of aggressive chemicals (such as bicarbonate and sodium chloride, sodium hydroxide, calcium hydroxide, sulfurous and sulfuric acids) on the physical and mechanical properties of polymer waterproofing membranes (for example, on tensile strength and elongation) are considered. Test samples from polymer membranes were immersed in solutions of aggressive chemicals for a period of 30 to 120 days. Changes in physical and mechanical characteristics (tensile strength, elongation, mass loss, etc.) were monitored further. According to the results of the study, for example, when exposed to 3% sodium bicarbonate solution (NaHCO₃, for 120 days), the longitudinal tensile strength of the membrane increased by 6.44%, and the relative elongation increased by 2.74%. A calculation in accordance with PNST 630-2011 to determine the potential service life of the LOGICBASE™ V-SL polymer membrane under the aggressive effects of groundwater, which was at least 100–150 years, were made in the future. A report according to the results of the research was obtained.

V.N. SHALIMOV¹, Candidate of Sciences (Engineering), head of technical support (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.V. CYBENKO¹, head of the technical service of the direction “Engineering waterproofing” (This email address is being protected from spambots. You need JavaScript enabled to view it.),
I.N. GOGLEV¹, technical specialist of the direction “Engineering waterproofing” (This email address is being protected from spambots. You need JavaScript enabled to view it.);
S.A. LOGINOVA², Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ LLC TECHNONICOL-Construction Systems (47, str. 5, Gilyarovskogo Street, Moscow, 129110, Russian Federation)
² Yaroslavl State Technical University (88, Moskovsky Avenue, Yaroslavl, 150001, Russian Federation)

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