Waterproofing concrete using Triton TT Admix

Triton Systems supplied 3,280 kg of TT Admix, its BBA certified concrete waterproofing system, to a prestigious commercial new build project in West London. The construction comprises a watertight concrete base slab with welded sheet piled walls and a watertight concrete capping beam to provide a Type B integral waterproofing solution to BS8102:2009. On top of the slab is a steel framed structure.

TT Admix was specified following discussions between Triton and the main contractors who were impressed by Triton’s site inspection regime and the company’s ability to cover all aspects of waterproofing, not just watertight concrete, under one technical viewpoint and one warranty. TT Admix is designed to be used as an admix at the time of batching. Its active chemicals react with fresh concrete to generate a non-soluble crystalline formation which seals the concrete itself against the penetration of water or liquid - protecting it from the deterioration effect of harsh environmental conditions.

800 4.1kg bags of TT Admix were supplied to complete the job, 120 of which were for the capping beam. Quattro Readymix supplied the concrete at a dose of one 4.1kg bag of TT Admix per m3 of concrete.

All the construction joints for the watertight concrete slab pours were waterproofed using Triton’s standard detail with Triton TT Waterstop, a pre-formed waterstop which swells up to 350% when in contact with water, held in place with Triton TT Swellmastic S2, a one-component hydro-reactive expansion sealant. For warranty purposes, the Triton team inspected the installation before any concrete was poured. The construction joint between the watertight concrete slab and the sheet piled wall was waterproofed in the same way.

Triton produced a number of non-standard drawings for this project to fit the customer’s design to show the waterproofing recommendations, including proposals for the sheet piled wall intersection and for the capping beam.