Article: Effect of Nano-Magnesium Oxide on the Expansion Performance and Hydration Process of Cement-Based Materials.
Materials (Basel, Switzerland)
2021 Volume 14, Issue 13
Abstract: Many scholars are concerned about the effect of nano-MgO as an expansion agent on the performance of cement-based materials at an early age, but over a long period less attention is paid to expansion stability and mechanical properties. This article ... ...
| Abstract | Many scholars are concerned about the effect of nano-MgO as an expansion agent on the performance of cement-based materials at an early age, but over a long period less attention is paid to expansion stability and mechanical properties. This article examines the influence of nano-MgO on the long-term consistency, fluidity, expansion stability, hydration, and mechanical properties of 30% fly ash cement-based materials and improves research into nano-MgO as an expansion agent. Expansion performance, flexural and compressive strength, and stability after boiling and autoclave treatment were tested for specimens mixed with a 2, 4, 6, 8 and 10% cementitious material mass of nano-MgO. X-ray diffraction (XRD) and scanning electronic microscopy (SEM) were employed to study their hydration process and microstructure. The results showed that nano-MgO had an obvious effect on the consistency, fluidity and expansion performance of cement paste. After curing in water for 365 days and autoclaving thereafter, the hydration of nano-MgO was relatively complete. The volumetric expansion pressure of the magnesium hydroxide (Mg(OH) |
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| Language | English |
| Publishing date | 2021-07-05 |
| Publishing country | Switzerland |
| Document type | Journal Article |
| ZDB-ID | 2487261-1 |
| ISSN | 1996-1944 |
| ISSN | 1996-1944 |
| DOI | 10.3390/ma14133766 |
| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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