Underground Technology Construction Products

The Underground Technology Team is MAPEI’s answer to the growing demand from the
construction market for a range of products dedicated to underground construction work.
Thanks to their capacity and investments in their R&D laboratories, and the technical know-
how developed in all countries, MAPEI created the dedicated product range “Underground
Technology Construction Products”.

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Alkali-free flash setting accelerators for shotcrete
Wide range of mortars for repairing concrete
Synthetic waterproofing membranes for tunnels and underground works
Super-plasticizer, hardening accelerating admixtures for precast concrete

Ongoing Projects

Breakthrough of the Santa Lucia Tunnel

With its 15.9 m of diameter, the TBM used for the "Santa Lucia" tunnel in Italy has been the largest one ever used in Europa. The company “Pavimental S.p.A.” has driven this machine to excavate the 7.5 km of tunnel along the highway A1, between Bologna and Florence. MAPEI UTT has successfully participated in the realization of this impressive tunnelling project, providing most of the chemical products used for the TBM excavation. For the soil conditioning, Polyfoamer ECO/100 has been chosen after a selection among 8 products, being the foaming agent with the best combination between high technical performances and low environmental impact. Thanks to its quick biodegradation and minimum eco-toxicity, its use has avoided the classification of the muck as a "waste" and has minimised the time necessary to temporary stock the muck in the job-site area before its final disposal: an average of 7 days with the Polyfoamer ECO/100 against 28 days necessary with the other foaming agents. Also, the Mapequick CBS System 1L (retarding agent with plasticising effect) and Mapequick CBS System 3 (accelerator) have been used for the injection of the two-component backfill grout behind the tunnel lining. Finally, the 32.000 segments, with a thickness of 60 cm, have been produced by the company "Maccaferri S.p.A." using our Dynamon NRG1015S, superplasticiser admixture specifically designed for the precast concrete industry.

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MAPEI UTT will be present at WTC 2023 as Platinum Sponsor

May 2, 2023

The Greek Tunnelling Society, presents the yearly World Tunnel Congress (WTC2023), which will be held in the city of Athens between 12 – 18 May 2023.

WTC is the greatest annual event of the International Tunnelling Association (ITA-AITES) and is considered as the top attended tunnelling conference in the world with the participation of more than 2000 professionals.

The congress covers all topics related to tunnelling and underground works industry.  This event features scientific publications and technical presentations created and reviewed by skilled professionals and academics coming from all parts around the world. WTC 2023 will also host a large exhibition, where traditionally all major international firms involved in the tunnelling industry will participate.

Mapei UTT team will be present at the 2023 World Tunnel Congress as a Platinum Sponsor. Our team of technicians and specialists will be available for more information at the UTT exhibition stand at Booth 60-61-62-63 (ZONE C).