If the MiraCLAY is in a hydrated state, it offers tremendous impermeability and excellent resistance to most chemicals. One impressive quality is that it has the ability to heal itself if ripped or punctured. Environmentally friendly, it is non-toxic, non-polluting, and has no fumes.
The job was a little more challenging since the bentonite membrane was installed on top of the existing concrete slab; the new concrete was placed on top of the bentonite. “Due to extenuating circumstances, such as weather, the Mira-CLAY was exposed to the elements because the concrete could not be poured immediately following application,” said Stephan Dorsey of Womack. “The product was not totally submerged in water, and there was minimal foot traffic, so it was able to form an impermeable layer for the existing substrate and the new basement. It allowed us to be flexible without compromising the integrity of the waterproofing.”
To further eliminate the problems with groundwater and water pressure, the building was designed to use a french drain around the outside walls of the basement. The drain was wrapped in filtration cloth that drained the water, which was then pumped away from the building. This relieved hydrostatic pressure created by the groundwater.
“Below-grade applications are different. It’s hard to tell what situations you may be faced with until you start digging,” said Brouillette. “The MiraCLAY is adaptable to a variety of situations. It can be easily adjusted. You want a product that can offer the kind of flexibility that allows it to function effectively, no matter the complexity of the job.”
