AI Article Synopsis
- Researchers have developed a new magnesium oxychloride cement (MOC) that greatly improves water resistance compared to traditional formulations, which suffer from low durability.
- The new MOC incorporates 20% fly ash and 3% hexadecyltrimethoxysilane (HDTMS), enhancing its water resistance while maintaining strong mechanical properties.
- Microscopic studies reveal that these additives increase the gelling phase content and optimize the pore structure, resulting in a high residual strength coefficient of 0.91 after 7 days of water immersion.
Article Abstract
The application of magnesium oxychloride cement (MOC) is promising, but its poor water resistance seriously hinders its development and application. In this paper, we describe a new type of MOC with excellent water resistance, prepared using fly ash and hexadecyltrimethoxysilane (HDTMS). SEM, XRD, FTIR, TG/DSC, and other microscopic-scale studies were conducted to investigate the mechanism underlying the water-resistance enhancement of the new MOC. It was found that adding 20% fly ash and 3% HDTMS can strengthen the water resistance of MOC while retaining high mechanical properties. In particular, the residual coefficient remained at 0.91 after 7 days of immersion. This is because these two additives, when used together, can increase the content of the gelling 5-phase of MOC, as well as optimize the pore structure of MOC.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9823376 | PMC |
| http://dx.doi.org/10.3390/polym15010172 | DOI Listing |
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