Introduction

Power Generation, Transmission, and Use

Markets, Regulation, and Oversight

Impacts of Power Generation and Transmission

Looking Ahead

Appendices

CEIR Report Map

PPRP Home

Maryland Power Plants and the Environment (CEIR-18)

5.4.3 CCB Use in Industry and Manufacturing

PPRP has worked directly with industry partners to investigate the utility of CCBs in some specific products, such as pervious concrete (Figure 5-17). This material helps to protect surface water bodies by allowing storm water to infiltrate through pavement into underlying soil and ground water, rather than running off of traditional impervious pavements directly into storm sewers and surface water bodies.

Figure 5-17 Pervious Concrete Test Cylinders Made with CCBs

Image of pervious content test cylinders

More broadly, PPRP has monitored and documented the rate at which CCBs are sold from power plants to industry, thus showing the “appetite” for these materials in industry. Although 86 percent of the CCBs generated in Maryland each year are being used without ever going to a disposal site, years of CCB disposal and filling operations in Maryland have left a large number of legacy CCB fill sites. By supporting research on the success of recovering and potentially beneficiating previously disposed CCBs (as at the R.Paul Smith CCB landfill, discussed in Section 4.6.4), the industry desire to make use of these materials may continue to be met, even if the generation of CCBs changes with changes in the power generation sector (i.e., decommissioning of coal fired power plants or switching from coal to natural gas as the preferred energy source). The use of previously landfilled ash has a secondary benefit of removing potentially leachable materials from the environment and converting them to stable, non-leachable monolithic materials.