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 the TAC 2022 Vancouver Conference

September 19, 2022
Mapei UTT team will be present at this year's edition of the TAC 2022 Vancouver Conference from Wednesday, starting from November 2nd, 2022 to Friday, November 4th, 2022.

The theme for 2022, “Tunneling for the Future – Sustainable and Smart”, will be highlighted over the two-day conference through plenary presentations, technical sessions, networking, and a trade exhibition to showcase tunnelling and trenchless technology throughout Canada and around the world. The TAC 2022 Vancouver conference will be held at the Fairmont Hotel in downtown Vancouver, British Columbia.

Our specialists will be available at the UTT booth. Learn more about TAC 2022 on the conference's official website.