The tanks’ concrete
floor had visible
The application of grey
longevity and structural
integrity to the tanks’
Additionally, the crew applied a polymer-blend, rapid-set
mortar to patch up the concrete in both tanks. Passarella
explained that the mortar was utilized to fill in the holes
and crevices in the concrete floor, achieving a smooth, even
surface finish. Since the mortar set rapidly, the crew was able
to expedite the entire application by having an event surface in a short time whereas the alternative of re-cementing
both structures would have resulted in considerable down
time and added expense. Just before the polyurea application commenced, the Straight Line crew spray-applied to
the tanks’ concrete surface and steel walls a quick-set primer
specified by the manufacturer of the polyurea coating.
The polyurea application for the interior of both tanks consisted of two 40-mil coats of grey, chemical-resistant polyurea coasting blended for abrasive-resistant characteristics.
The polyurea was applied using a Graco Reactor H-XP3.
For the duration of the application, the Straight Line crewmen were outfitted with PPE that included Tyvek suits and
Passarella mentioned that the crew had to overcome a few
weather issues, mainly consisting of rainy days that contrib-
uted to minor delays of the project. The Straight Line
Crew pumped the rainwater out as needed before carrying on with the particular phase of the project they were
in. It took the Straight Line crew two weeks to complete
the project, averaging a week per tank.
Upon completion of the polyurea application, there was
a distinct “night and day” contrast from what the tanks
had looked like before. According to Passarella, the polyurea not only bolstered the concrete floors’ structural
integrity, but it provided a major upgrade to the tanks’
“They look beautiful,“ noted an impressed Passarella.
“The aesthetic is just an added bonus to polyurea’s protective properties. As long as the tanks are prepped to
their respective manufacturers’ recommendation, the
polyurea system isn’t going to go anywhere and it will
protect the concrete floor for a long time to come.”
For more information about Straight Line Contracting,
SEPTEMBER/OCTOBER 2015 • SPRAY FOAM MAGAZINE