Summary
This manual provides guidance for identifying, maintaining, and avoiding alkali–aggregate reaction problems in portland cement concrete (PCC) airfield pavements. It includes information regarding the resurgence of destructive alkali–silica reaction (ASR) in PCC airfield pavements; briefly reviews the mechanism of the ASR reaction; explains how to identify ASR in the field; summarizes experience in trying to maintain pavements with ASR; and discusses available alternatives to avoid ASR in new pavements. Testing protocols are provided to identify potentially reactive aggregate, as well as required mitigation.
