“roads&bridges” ltd., varna bulgaria - aace.alaace.al/event-2015/presentations/production...

Eng. Ivan Koleliev

Eng. Borislav Neykov

“Roads&Bridges” Ltd., Varna Bulgaria

1. Company overview 2. Production of PMB’s 3. PMB plants details 4. Products based on PMB’s 5. Production control 6. Projects done with PMB’s products 7. Conclusions

Established in 1993 Main activities: • Design, construction, reconstruction and maintenance of

roads, bridges and other road infrastructure • Production of inert materials, concrete mixtures, asphalt

mixtures and bitumen products

• Start of production in 2009 • Development of bitumen products based on DuPont™ RET

technology for: • PMB 45-80/65 – airports and highways PMB 25-55/60 – main roads, city boulevards and intersections • Development of an innovative products with increased

resistance to fuels: - Joint fillers pastes - Bitumen for hydro insulations - Bitumen emulsions

Plant capacity: 300Mt/24 hours Bitumen modification with DuPont™ Reactive Terpolymers Technology Developed products: PMB 45-80/65 PMB 25-55/60

Hoppers for Elvaloy® RET’s

Polyphosphoric Acid (115%) dosage system -Container with PPA heating -PPA vessel and pump with heating

-Pipes for PPA with heating

-PPA hoppers

Using Almix Plant with HSM: Products developed: Joint filler paste Bitumen for hydro insulation

Joint Filler Pastes –compliant with BDS-EN 14188-1 • Type F2 - for joints filling at areas where fuel resistance is critical, high

demands for elastic recovery and softening temperature is needed- airports, bridges, terminals, parking lots.

• Type N2 - for joints filling at asphalt roads

Bitumen BP 85/25 (for hydro insulations in construction) – Compliant with BDS 7566 NRA specification 2009 of Bulgaria. – for isolating concrete surfaces and fundaments, bridges, drainages Asphalt emulsions BDS-EN 13808 – cationic, anionic and for hydro insulation

Joint Filler Pastes Type F2

Gold medal for innovation at „International Technical fair Plovdiv-2011”

Laboratory in Varna Equipment according to BDS-EN, AASHTO, BDS, BDS-ISO, ASTM, BS

Project details – installation of the PMB plant on site and production of PMB for wearing asphalt course and for binder layer

Construction of Trakia Highway Lot 4 Yambol - Karnobat

Aim – to prevent the appearance of cracks on the surface of the airstrips Project details – repair of concrete surfaces, application of geo grid Telit C40/17, and laying of 7 cm AC16 with PMB 45-80/65

Repair of concrete surfaces at Varna and Gorna Orjahovitza airports

Aim – comparison of rutting resistance Project details – laying of asphalt concrete on Devnja boulevard in Varna using PMB 25-55/60 (heavy traffic)

City of Varna-reconstruction of boulevards

Standard asphalt mixture after 3 years of service

PMB asphalt mixture after 3 years of service

Project details – joints filling with fuel resistant PMB paste type F2

Varna airport – joints filling with PMB paste type F2

Project details – PMB hydro insulations of bridges

Bridge over Maritza river - Reconstruction and Electrification of Rail road-part of the Pan European corridors IV and IX “ Plovdiv-Svilengrad”. Phase 3: “

Svilengrad-Turkish border”

Project details – PMB emulsions for surface treatments

Rehabilitation of streets in Aksakovo municipality

Modified bitumen's technologies could be applied in many areas of infrastructure construction Usage of PMB is giving better performance of the asphalt layers enhancing their period of exploitation and resistance to heavy traffic loads, temperature conditions, fuels Applying a tailor made approach it is possible to be met the highest requirements for specific projects - like airports and highways

Thank you for your attention!