For us it is a big honor and responsibility to perform waterproofing works in the very center of Kiev, in historic buildings, construction of which began in late 17th century and was finished in May 1803. The contemporaries described the existing building of Mystetskyi Arsenal like this:
“This institution is one of the biggest in Russia. Huge two-storied stone building of said institution is decorated with rustics and its magnificent simplicity strikes you. The building is almost perfectly square in plan, with each side having around 100 sazhens in length (1 sazhen is approximately 7 feet). This arsenal located inside the castle in front of the Western, or Holy Gates of Pecherskii Monastery was founded in 1784 on the site of Voznesenskii Nunnery which existed until 1712, when the nuns were transferred to Kievo-Podol district; the remaining buildings of the monastery housed an armory for some time.
The stone church built in 1705 by the then Mother Superior, mother of Hetman Mazepa, existed until 1798. Reportedly, General of Engineers Carl de Charonne was the Architect of the Arsenal, but the contemporaries deny it…”
Although waterproofing is performed in the basements, operations must be conducted with extreme care and accuracy in order not to damage ancient walls and floors. Quality of waterproofing depends on every stage of the works performed, namely preparation of surfaces, application of 4 layers of waterproofing mixtures and, finally, injection waterproofing. Injection waterproofing is probably the perfect waterproofing method which is used, besides construction and reconstruction of buildings and houses, for reinforcement and waterproofing of rocks inside the mines. With the help of this method waterproofing mixtures based (mainly) on polyurethane resins are pumped under high pressure (approximately 200 – 250 atmospheres) into the holes bored in the wall, basement, tunnel or mine rock.
The boreholes are drilled in predetermined places to achieve the highest efficiency of filling cracks and pores; after that dust is removed from the holes, packers are inserted, and waterproofing hydrophobic mixture Adexin HS-2 is pumped through the packers. Optimal pressure – about 12 atmospheres – is used in order to eliminate any possibility of damaging ancient walls.