Self-compacting concrete, recycledconcrete as aggregate, calcium nitrate accelerators. These are just a few of the topics covered in the 47 papers included in ACI SP-200, Fifth CANMET/ACI International Conference on Recent Advances in Concrete Technology. You?ll be able to compare the structural performance of full-scale columns using ordinary and self-compacting concretes and with stirrup configurations representing differing degrees of confinement. You?ll also learn about a procedure that improves the quality of concrete made using aggregate produced from recycled concrete. And about experiments showing that, at 5? C, calcium nitrate is a much more effective accelerator than calcium chloride.