Subcontractors

Road Construction Laboratory at "Road Company" EAD, Sofia

Road Construction Laboratory at "Road Company" EAD, Sofia is accredited for carrying out laboratory control in new construction and repair of road infrastructure. The laboratory performs control of building materials for the GEOTECHMIN group of companies and for external clients.

In accordance with European and national road construction standards, the laboratory carries out complete tests on the following materials: aggregates for concrete; aggregates for bituminous mixtures and surface treatments for roads, airfields and other trafficked areas; aggregates for unbound and hydraulically bound materials for use in civil engineering work and road construction; viscous and polymer modified bitumen; bituminous mixtures /asphalt mixtures/, bituminous emulsion and compacted asphalt layers, fresh concrete and hardened concrete and etc.

The laboratory has modern and highly efficient measuring equipment and equipment for sampling and laboratory testing, makes mix designs for the production of asphalt mixtures, concrete, bitumen paste, stabilization of unfit soils and cold recycling on site.

Construction Testing Center of "TPA" Ltd., Sofia

TPA International (Technische Püfanstalt) with its headquarters Austria is a service company to STRABAG SE with the main purpose of providing quality and innovation in the construction sector.

It is represented in 12 European countries with a functioning network of more than 100 laboratories with more than 600 associates.

TPA International is represented in Bulgaria by TPA Ltd. Which has two testing laboratories, the Construction Testing Center (CTC), Sofia and Burgas. Since August 2003 the CTC of TPA Ltd. has been the successor of the Central Construction Laboratory of INGSTROY AD Sofia. The CTC of TPA Ltd., Sofia is an accredited laboratory for testing and sampling as follows: cement, aggregates for concrete; aggregates for bituminous mixtures and surface treatments for roads, airfields and other trafficked areas; aggregates for unbound and hydraulically bound materials for use in civil engineering work and road construction; mortars and asphalt concrete mixtures; concrete and reinforced concrete products; bitumen and bitumen emulsions and pastes; asphalt-concrete mixtures; concrete products, soils and etc. At present, the laboratory works with over 50 construction companies on the Bulgarian market.

The CTC has a permanent highly competent staff for sampling and testing within the scope of accreditation. Four of the employees have extensive experience in designing concrete and asphalt mixes, as well as servicing of production plants for concrete, concrete products, asphalt mixtures and aggregates.

CTC of TPA Ltd., Sofia is also used as an independent third-party testing laboratory.