DOT staff in more than half of the nation's states expect concrete's share of paving to increase during the next five years, according to a recent market research survey by the Portland Cement Association (PCA).

Respondents cited concrete's life-cycle cost advantages and lower maintenance levels as reasons to expect an increase in its use. Fifty-four percent of states considered life-cycle cost an important driver. Additionally, concrete pavements were lauded for their performance on high-traffic roadways, with 30% of respondents saying it is the reason they select concrete over asphalt for paving state roadways.

“After lifecycle and performance, concrete's initial cost was an important factor,” Wayne Adaska, PCA's director of pavements. “For example, the number of DOTs that consider concrete to have a higher initial cost than asphalt decreased by 22% compared to a similar survey conducted in 2005.”

The survey also measured the impact of sustainability or “green” issues on pavement choice. While the majority of respondents considered sustainability to have only a minor impact on material selection, 50% of state DOTs anticipate the influence of sustainable development on pavement material selection to grow within the next five years.

The survey was completed in 2008 by employees from all 50 state DOTs.