From magnesium oxide, magnesium oxide concrete to magnesium oxide concrete dams

Abstract The development of magnesium oxide (MgO), magnesium oxide concrete, and magnesium oxide concrete dams in China has experienced more than 40 years. So far, more than 60 MgO concrete dams have been built in China, creating significant economic and social benefits. In order to promote the continuous progress of MgO concrete dam construction technology, this study focuses on the effects of the calcination system on MgO activity. The delayed micro-expansion characteristics of MgO concrete significantly differ from non-MgO concrete. The temperature control measures of MgO concrete dams significantly differ from non-MgO concrete dams and the uniformity of MgO distribution in concrete and points out that the calcination system of magnesite determines the MgO activity. The MgO activity determines the expansion performance of MgO concrete, and the expansion performance of MgO concrete determines the temperature control measures of the MgO concrete dam. MgO concrete dam construction technology is worth popularization and application.