When bridges, dam walls and other structures made of concrete are streaked with dark cracks after a few decades, the culprit is AAR: the alkali-aggregate reaction. AAR damages concrete structures all ...

VICKSBURG, Miss. - Researchers from the U.S. Army Engineer Research and Development Center (ERDC) know a thing or two about aging and ailing infrastructure. Currently one of the largest issues facing ...

To understand phenomena like alkali-silica reactions (ASR), alkali-carbonate reactions (ACR) and alkali-aggregate reactions (AAR), it is important to investigation reaction kinetics in cement, mortar ...

Things Petrography Can and Cannot Do…. Cracks. Blisters. Spalling. Scaling. Delamination. Low Strength. These are sources of dissatisfaction for owners and aggravation for contractors involved in ...