De Realtà Mapei n.° 34 - 9/28/2021

All Aboard

MAPEI helps deliver mass transit for all seasons
Overview: Faced with a tight schedule and challenging weather conditions, the Belluz Group turned to MAPEI for the range of high-end products and support they needed to complete this new-build terminal project in the heart of Canada’s biggest city.

VivaNext is a major bus transit expansion project stretching across the north of Canada’s largest metropolitan area, and into Toronto’s downtown core at the shore of Lake Ontario. With dedicated bus lanes and large attractive passenger terminals, it is meant to entice more use of public transit, thus reducing reliance on automobiles.

Building external infrastructure in this geographical area always poses a unique challenge, as the region experiences one of the larger seasonal temperature differentials to be found anywhere – from its lowest winter temperature of -27°F (-33°C) to its highest summertime high of 105°F (40.6°C). The contractor, Belluz Group, was tasked with finding a proven solution that would withstand installation through the freeze/thaw cycles of the different seasons, while providing durability and waterproofing assurance.

Further, covering the Highway 7 line and Yonge Street, the area to be constructed totaled approximately 75,000 sq. ft. (6 968 m²).

Ultimately, it was delivered three months ahead of schedule. The story of that accomplishment is one of close cooperation between contractor and manufacturer. It is a story of Belluz and MAPEI.

Belluz Group’s Paul Belluz was seeking high-performance products that could be applied on a tight schedule, plus meet the specific needs for installation during the winter months. Product choices had to be as flexible as the weather. “We knew we’d need to tarp the site in winter,” Paul Belluz noted. “We knew MAPEI quality, and we knew we could rely on MAPEI Technical Services.”

 

MAPEI products on site

The roadside platforms’ mortar bed foundations were laid using Topcem Premix (accelerated-cure screed) with Planicrete AC (acrylic latex admixture for mortar) where site conditions allowed. For specialized conditions, they instead chose Mapecem 202, a shrinkage-compensated, polymer-modified, fast-setting cementitious mortar with a corrosion inhibitor. This portion of the work was completed using Mapecem Quickpatch, primarily as gap filler, to provide continuous sloping for run-off.

Once surface preparation of the on-ground concrete was done, the exterior specifications called for a good waterproofing barrier and tile shell. Along with MAPEI’s Fiberglass Mesh, the Belluz Group crew installed Mapelastic 315 trowel-applied, flexible, fiber-mesh-reinforced waterproofing and crack-isolation membrane, which exceeds ANSI A118.10 requirements, for waterproofing.

Flexibility needs informed the choice of mortar as well. To facilitate installation that wouldn’t be hampered by extreme weather conditions, tiling was completed using MAPEI Ultralite S2 premium, highly deformable, lightweight, gauged-tile mortar with polymer, formulated with Easy Glide Technology™ for ease of application. MAPEI Ultralite S2 features a long open time and superior transfer properties to enhance back-buttering – all of which made it possible for installation crews to maximize their efficiency despite working in challenging weather conditions.

The need for a quick turnaround influenced the choice for grouting. MAPEI’s Ultracolor Plus FA was selected, where appropriate, for its rapid-setting properties and for its DropEffect™ technology, which reduces surface absorption and helps repel water, dirt and grime from penetrating grout joints.

For portions calling for cast-iron tiles, they used Planigrout 712 non-shrinking, non-metallic grout with corrosion inhibitor and silica fume, which provides superior resistance to water penetration, freeze/thaw cycles and de-icing salts. It also provides exceptional placing and performance characteristics, and here was coupled with Planibond EBA as its nonshrink, moisture-tolerant epoxy bonding agent.

The completed work on this site is just one piece of a major infrastructure build for VivaNext. With over 40 platforms, it is designed to tie into the Metrolinx Light Rail Transit (LRT) network, with 25 terminals planned across Eglington Avenue. This will all help move traffic seamlessly throughout Toronto. Aided by the scope of reliable MAPEI products, all formulated to meet the specific needs of any construction job in any season, the future of Toronto’s mass transit should be on track and on time.


Technical data

VivaNext mass-transit terminal construction – Toronto, ON, Canada
Year of construction: 2019
Years of MAPEI involvement: 2019-2020
MAPEI coordinator: Jeff McCoppen
Project owner: York Region Rapid Transit Corporation
Contractor: Belluz Group
Project size: 75,000 sq. ft. (6 968 m²)
Challenges: Tight project schedule and extreme weather conditions
Where MAPEI products were used:

  • Fiberglass Mesh used on the platforms’ surface-prepped concrete in conjunction with Mapelastic 315 to create a waterproofing and crack-isolation membrane
  • Mapecem 202 installed, with Topcem Premix in the platforms’ mortar beds where corrosion inhibition was necessary
  • Mapecem Quickpatch used as a gap filler and for sloping on platforms’ mortar beds
  • MAPEI Ultralite S2 used as mortar for tiling installation
  • Planigrout 712 used to install cast-iron tiles, coupled with Planibond EBA nonshrink, moisture-tolerant bonding agent
  • Topcem Premix accelerated-cure screed used in the platforms’ mortar foundations in conjunction with Planicrete AC
  • Ultracolor Plus FA used to grout ceramic tiles throughout the terminal

Productos mencionados en el artículo

Fiberglass Mesh
Fiberglass Mesh
Para los productos impermeabilizantes Mapelastic , Mapelastic 315 , Mapelastic HPG y Mapelastic Smart Fiberglass Mesh de MAPEI es una malla…
Mapecem 202
Mapecem 202
Mortero con capacidad de espesor medio, de dos componentes y fraguado rápido Mapecem 202 es un mortero de cemento de dos componentes, de…
Mapecem Quickpatch
Mapecem Quickpatch
Restaurador de concreto de alto rendimiento Mapecem Quickpatch es un material versátil de cemento, de fraguado rápido, que se usa para la…
MAPEI Ultralite S2
MAPEI Ultralite S2
Mortero de calidad superior con polímero, altamente deformable y liviano, para losetas calibradas MAPEI Ultralite S2 es un mortero liviano…
Mapelastic 315
Mapelastic 315
Membrana impermeabilizante profesional a base de cemento Mapelastic 315 es una membrana impermeable y de aislamiento de grietas, aplicada…
Planibond EBA
Planibond EBA
Agente de unión epoxy de alto modulo Planibond EBA es un agente de unión epoxi multiuso, de alto módulo y dos componentes. Planibond EBA no…
Planicrete AC
Planicrete AC
Aditivo de mezcla, de látex acrílico para mortero y estuco Planicrete AC es un aditivo de mezcla de látex líquido concentrado y de un…
Planigrout 712
Planigrout 712
Lechada de alto rendimiento, sin contracción, no metálica Planigrout 712 es una lechada a base de cemento, de un componente, que no se…
Topcem Premix
Topcem Premix
Mortero de enrasado listo para usar Topcem Premix es un mortero de curado acelerado, adecuado para aplicaciones de adherencia como de no…
Ultracolor Plus FA
Ultracolor Plus FA
Sustitución de lechada, de fraguado rápido, “todo en uno” para lechadas con y  sin arena Ultracolor Plus…

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