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Below Grade (A20): Below Grade Walls-Concrete

Summary Source Health End Use Lifecycle ATHENA BEES Properties Costs
Component
Name		 Component
Source		 Summary: Health Low VOCs
(Below Std. Products)		 VOC Certification GREENGUARD VOC Certification GreenSeal VOC Certification
by State		 Other Certification Other Toxins/Pollutants
Generic 100% Portland Cement Concrete
03300		 Generic Cons: More global warming gases created. Unsealed surfaces may create a dust problem. Recycling operations create dust. Inert material, does not off-gas N/A N/A N/A N/A Dust from unsealed surfaces can be an issue
Generic 15% Fly Ash Concrete
03300		 Generic Pros: Harder surface, more durable, less dust. Less global warming gases created. Inert material, does not off-gas N/A N/A N/A N/A May have trace heavy metals in fly ash; some experts maintain the metals are effectively locked into the cementitious matrix, preventing their release. Furthermore, by using fly ash in concrete rather than landfilling it, the potential for the metals to leach into the environment is reduced. Concern about higher incidence of Radium-226 in fly ash than in cement.EPA study suggests that the slight increased risk imposed by the greater exposure was offset by the reduced exposure to radon gas, which is less likely to escape fly ash's glass sphere structure and the less permeable nature of high volume fly ash concrete.
Generic 20% Fly Ash Concrete
03300		 Generic Pros: Harder surface, more durable, less dust. Less global warming gases created. Inert material, does not off-gas N/A N/A N/A N/A Dust from unsealed surfaces can be an issue

Key Definitions To be determined Standard Good Better