Where does construction of a metro tunnel start from, and how are controlled the materials used for building? You have certainly asked yourself these questions , because the expansion of metropolitan subway has become the main focus for the national construction sector. Actually the control of a number of these materials input used for the metro tunnels have been exercised by the University construction testing laboratory of the University of Architecture, Civil Engineering and Geodesy (UACG).
The laboratory performs testing on building materials, soils, earth fundaments and waters. It works closely with leading experts, designers, educators and consultants in the industry and construction products. “Here we elaborate projects, expert opinions, combinations for concrete, mortar , etc., that cannot be prepared by any other laboratory,” informs the University.
In recent years it is namely the laboratory of the UACG that performs control of basic materials (concretes, reinforcement, shotcrete, injection mixtures , aggregates, cement, etc.). for the tunnels “TZUM”, “Cherni Vrah”, “Al. Malinov “, ” Evstatiev “. Metro stations “TZUM “, “NPC”, “Cherni Varha “, “7”, “18”, “19”, “Obelya” ,as well as the road sections in Obelya and Mladost constructed by the method of open area excavation . The laboratory has also carried out the control of sports hall, shopping malls, the underground car-park under Tsarigradsko Shosse , office buildings.
The benefits of the laboratory include wide opportunities for testing and quality control of materials within structures – concrete strength, presence and location of embedded reinforcement, active corrosive processes. While the information obtained is used for constructive investigation, design, renovation and technical certification of buildings and facilities.