Chemical composition of cement, fly ash, and metakaolin ... and morphological effect (Yan, 2007). In the SEM images, fly ash particles with a complete grain shape and smooth surface (not involved in ...

Here are the landfills that could take toxic waste from the L.A. wildfires in the coming weeks — many have not accepted ...

The asteroid Bennu has provided groundbreaking insights into the chemistry that may have set the stage for life in the early ...