Due to increased air pollution control regulations throughout North America and other parts of the world, contamination of fly ash with natural carbon or powdered activated carbon (PAC) is becoming a growing threat to the continued use of fly ash in air-entrained concrete applications. This work will provide information on the collaborative effects between FlyASHDirect and BASF on the development of advanced chemical methods for treating fly ashes affected by various forms of natural carbon or PAC. Results from testing of treated fly ashes in air-entrained concrete evaluations are included, showing that entrained air can be generated and remain stable during concrete agitation. Click Here For Complete Article Text
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