Microscopic techniques were employed to investigate element enrichment characteristics in the vicinity of the interracial transition zone （[TZ） of MgO concrete. Results indicated that the morphology of products of h...Microscopic techniques were employed to investigate element enrichment characteristics in the vicinity of the interracial transition zone （[TZ） of MgO concrete. Results indicated that the morphology of products of hydration in 1TZ was similar to the cement matrix but different by amount, size and crystal features. Elements Ca, Si, AI and Mg were obviously enriched in ITZ and uniformity of their distribution grew with age. MgO was non- uniformly distributed in concrete, accounting for 8.47% and 4.53% respectively in paste and ITZ area despite of fully mixture in construction, yet MgO showed inclination of migrating towards ITZ area with in-depth hydration and the gap in between was mit- igated from 3.94% at 7 d to 1.31% at 240 d so far as 5% of light- burnt MgO was incorporated.展开更多
基金Supported by the Twelfth Five-year Science and Technology Support Program (2011BAE27B01)the National Natural Science Foundation of China(51139001, 51209022)China Central Non-profit Research Funds for Institutes (CKSF2012035/CL)
文摘Microscopic techniques were employed to investigate element enrichment characteristics in the vicinity of the interracial transition zone （[TZ） of MgO concrete. Results indicated that the morphology of products of hydration in 1TZ was similar to the cement matrix but different by amount, size and crystal features. Elements Ca, Si, AI and Mg were obviously enriched in ITZ and uniformity of their distribution grew with age. MgO was non- uniformly distributed in concrete, accounting for 8.47% and 4.53% respectively in paste and ITZ area despite of fully mixture in construction, yet MgO showed inclination of migrating towards ITZ area with in-depth hydration and the gap in between was mit- igated from 3.94% at 7 d to 1.31% at 240 d so far as 5% of light- burnt MgO was incorporated.
