Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.

12+

Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.

17+

You must be at least 17 years old to access this App.

Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.

TPO Pocket Guide Screenshots

iPad

iPhone

About TPO Pocket Guide

This app is designed to encourage a better understanding of the use of thin-polymer overlay (TPO) systems for the preservation of concrete bridge decks. A TPO refers to a multi-layer overlay system that includes a polymer resin binder with polish-resistant aggregates broadcasted or seeded into the wet polymer prior to gelling or curing. The aggregate acts to provide friction for the wearing surface. This is typically applied in two layers at a specified coverage rate. A primer or pre-treatment is sometimes used to seal cracks and act as an adhesion promoter for the TPO. The TPO system is typically 3/8 inches in thickness when properly installed. Thickness may vary slightly dependent upon the gradation of broadcast aggregates specified for the project.

A TPO is designed to:

• Minimize the intrusion of moisture, de-icing chemicals, carbonation, and other potential sources of the pre-mature degradation of concrete bridge decks.
• Provide a protective, durable, skid-resistant wearing course for a concrete bridge deck.

This app is intended to educate the designer, owner, contractor, and inspectors about TPO installation best practices. By acting with a better understanding of their designed intent, the bridge owner can capitalize on the potential benefits of these overlay systems.

Although some broad guidance is suggested as to bridge deck condition assessment, this subject is not the primary intention of this app. The same holds true with the selection of TPO materials.