Wise recycling is a TDOT goal

By Steve Hall • February 25, 2009

Renew, reuse, recycle are three words familiar to most Americans, but they can be applied in surprising ways.

For instance, for the past several decades, the Tennessee Department of Transportation has used coal ash generated by a number of power-producing facilities as an ingredient in some road construction materials. It’s a process that allows TDOT to recycle materials from the plants that might otherwise be unusable.

The recent event at TVA’s Kingston Steam Plant renewed focus on what happens to coal ash. As clean-up in Kingston continues, Gov. Phil Bredesen has asked TDOT to evaluate material from the spill to determine how it might be reused in road and bridge projects.

The U.S. Environmental Protection Agency and Federal Highway Administration approve the use of fly ash in certain road construction applications, such as a supplement to cement in concrete, an aggregate component in both concrete and asphalt paving, fill material in embankments and roadbeds, as a stabilizing agent for soils and aggregate bases and in flowable fills. Fly ash is less commonly used as an anti-stripping agent in hot-mix asphalt and as a de-icing agent.

Here is some good news about coal ash. Tennessee Department of Transportation uses it for road construction materials.

NP NowPublic

Tags: | | |

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: