PSI - Issue 81

Bohdan Parneta et al. / Procedia Structural Integrity 81 (2026) 383–387

387

the studied specimens, which demonstrates the absence of progressive moisture accumulation typical of structures without waterproofing protection. Thus, horizontal injection waterproofing continues to effectively prevent capillary transport of water from the lower layers of concrete. The data acquired during the measurements are consistent with the results of a previous study, which was carried out fourteen years ago immediately after the installation of the horizontal injection waterproofing. Despite the influence of the aggressive saline environment for a long time, the concrete in the upper zone did not show any signs of re-saturation. This result indicates that the created injection barrier provides a long-term and stable effect. A minor rise in moisture in the lower parts of the samples can be expected, since these areas were in interfacial contact with the NaCl solution. However, the accumulation of moisture in this area is only superficial and does not lead to its absorption into the upper layers. In summary, horizontal injection waterproofing continues to demonstrate high efficiency even after a long period since its installation. The obtained results indicate the reliability of the selected method for protecting concrete elements against capillary moisture, which is an important factor in ensuring their durability and operational performance. 4. Conclusions 1. The conducted study established that fourteen years after the installation of horizontal injection waterproofing, the concrete specimens maintain stable moisture levels in the upper part, indicating the long-term effectiveness of the created injection barrier. 2. A substantial increase in moisture was found only in the lower zone of the samples, which was in interfacial contact with the NaCl solution. Т his value does not rise above the waterproofing level, which is evidence of the protective properties of the injection waterproofing layer against capillary moisture spread. 3. This study proves that during a long period of operation under the influence of an aggressive saline environment, horizontal injection waterproofing retains its protective properties. 4. The authors found that horizontal injection waterproofing is an effective method for preventing re-wetting of structures made of concrete. 5. The acquired results can be used to improve methods of waterproofing structures and develop recommendations for examining the condition of concrete structures in environments with high humidity. References Kovalchuk, V., Rybak, R., Hnativ, Y., Tkachenko, V., Onyshchenko, A., Kravets, I., Hermaniuk, Y., Babyak, M., Hembara, N., & Velhan, I., 2022. Assessment of the stressed-strained state of a reinforced transport pipe under the combined effect of ambient temperature and static loads. 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