Production of MgO-type expansive agent in dam concrete by use of industrial by-products

Effects of nano and micro size of CaO and MgO, nano-clay and expanded perlite aggregate on the autogenous shrinkage of mortar

“…Thus, MgO, calcined at low temperatures, generally are preferred in terms of control of expansion [38]. The hydration of CaO to Ca(OH) 2 is quick and can be completed in 3 days in water at 20°C, and MgO to Mg(OH) 2 is slow and about 57% MgO hydrates into Mg(OH) 2 in 180 days under the same condition, which is quicker than in water [47]. As above mentioned, CaO compensated for the earlier shrinkage and MgO the latter.…”

Influence of blast-furnace slag on behaviour of dolomite used as a raw material of MgO-type expansive agent

“…As a result, the shrinkage of concrete could be compensated in dam concrete with the MgO-type expansive agent. It was shown that the expansive agent made from the industrial by-products might be used in practices to compensate the shrinkage of dam [37].…”

Production of forsterite from serpentine – Effects of magnesium chloride hexahydrate addition

“…However, beneficial utilization is limited to some engineering applications such as a flux in iron and steel making and as a filler for road reclamation [6]. The mineral has been utilized as a magnesium resource by applying an acid extraction technique [7][8][9][10][11][12][13][14][15]. There have been several investigations on the extraction of serpentine to extend the field of application.…”