Volclay: The Self-Healing Tanking and Waterproofing System

When constrained beneath concrete slabs or against below-ground walls, bentonite transforms into a membrane impervious to water. However unconfined and wet, sodium bentonite will swell to between 10 and 15 times its dry volume.

The efficacy of Volclay is such that, when layered between needle punched geotextile fabrics (Volclay Voltex) or with a geotextile and a siliconized release liner (Volclay Swelltite), it can maintain its seal over small cracks, around penetrations (Swelltite and Voltex can be nailed in place prior to back-filling) and other irregularities, providing a reliable self-healing solution.

Voltex Swelltite can also waterproof plaza decks and earth-covered roofs when used in conjunction with toppings or paving of a prescribed weight.

Volclay DS/SWR may also be recommended if contaminated ground-water or saltwater conditions exist, subject to compatibility testing (as used on the ASB Building, North Wharf).

Used in conjunction with a complete range of bentonite-based accessories, otherwise complicated and failure-prone tanking waterproofing tasks become manageable.

Volclay can be:

Applied over green concrete
Easily joined
Applied in unfavourable weather
Applied in below-zero temperatures
Applied to concrete block and precast panels

To give peace of mind, Allco's Volclay system is a 'single-manufacturer system' which is BRANZ-appraised, BBA assessed, and meets the NZBC 50-year durability requirement. It features in MasterSpec and is supported with technical advice, details and a project-specific specification service if required. (contact your area's adviser to specific project information and details).

For specific project information and details, contact your area's Allco adviser.

Volclay Swelltite

Allco Waterproofing Solutions

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Volclay Swelltite is a bentonite waterproofing membrane designed for below grade masonry block, split-slab deck and plaza construction.

Swelltite is designed for waterproofing below-grade vertical and horizontal structural surfaces, as well as, above grade split-slab construction used with plaza areas, parking garages and sports stadiums.

Swelltite is excellent for:

Below-grade masonry block walls
Split-slab Plaza Deck Construction
Cut & Cover Tunnels
Masonry Block Foundation Walls
Concrete Foundation Walls
Earth-covered Structures

Installation:

Ready for use and requires no set-up
Does not require torching or priming
It can be applied in all weather conditions to green concrete
Can be installed in temperatures below freezing

In the opinion of BRANZ, the Volclay Waterproofing System if designed, used, installed and maintained in accordance with the statements and conditions of this Appraisal, will meet the following provisions of the NZBC:

Clause B2 DURABILITY: Performance B2.3.1 [a] not less than 50 years. the Volclay Waterproofing System meet this requirement. See Paragraph 14.1.
Clause E2 EXTERNAL MOISTURE: Performance E2.33. the Volclay Waterproofing System meet this requirement. See Paragraphs 16.1 - 16.3.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. the Volclay Waterproofing System meet this requirement and will not present a health hazard to people.

BRANZ Appraisal is of an Alternative Solution in terms of New Zealand Building Code compliance.

BRANZ Appraised

Volclay Voltex DS & DS/SWR

Allco Waterproofing Solutions

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Bentonite-Geotextile waterproofing system with Integrated Polyethylene Liner, used as a damp-proofing or waterproofing membrane below ground to protect basements and other underground structures against water penetration and water vapour transmission from the ground.

The Volclay Waterproofing System has been appraised for use as:

an external waterproof tanking membrane to in-situ concrete, precast concrete and concrete masonry basement constructions subject to hydrostatic pressures of up to 2 bar (20 metres); and,
a damp-proof membrane (DPM) to slab-on-ground and basement constructions; and,
a waterproof membrane to plaza deck roof structures

Clause B2 DURABILITY: Performance B2.3.1 (a) not less than 50 years. The Volclay Waterproofing System meets this requirement. See Paragraph 14.1.
Clause E2 EXTERNAL MOISTURE: Performance E2.3.3. The Volclay Waterproofing System meets this requirement. See Paragraphs 16.1 – 16.3.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. The Volclay Waterproofing System meets this requirement and will not present a health hazard to people.

This is an Appraisal of the Volclay Waterproofing System as an Alternative Solution in terms of New Zealand Building Code compliance.

BRANZ Appraised

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