A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Laboratory investigation of the chloride ingress into cement mortar incorporating a novel core–shell nanomaterial
Highlights The NS@LDH has been successfully synthesized. The incorporation of NS@LDH in cement paste has better chloride ion binding capacity. The incorporation of NS@LDH in mortar possess lower chloride ion migration coefficient. The incorporation of NS@LDH in mortar possess lower chloride ion diffusion coefficient.
Abstract The built-in limitations of the separate use of nano-SiO2 (NS) and layered double hydroxides (LDH) necessitate their combined use for improving the resistance of chloride transport into concrete. This study investigates the effect of a novel nano-SiO2@MgAl-LDH (NS@LDH) core–shell material (fabricated by in-situ co-precipitation method) on chloride transport of cement mortar through a comparative experiment. The mechanical properties, chloride-bound isotherms, rapid chloride migration (RCM), and chloride natural diffusion of mortar specimens were measured. The results show that the addition of NS@LDH improves both the compressive and flexural strength of mortar. Compared to mortars incorporating NS and LDH separately, the NS@LDH incorporated mortars exhibit a higher resistance to chloride transport. The chloride diffusion coefficient of the 2 % NS@LDH incorporated mortar is the lowest (reduced by 79 %). The NS@LDH induced combined effect of a significantly increased chloride-bound ability and refined microscopic structures contributes to the elevated resistance to chloride transport.
Laboratory investigation of the chloride ingress into cement mortar incorporating a novel core–shell nanomaterial
Highlights The NS@LDH has been successfully synthesized. The incorporation of NS@LDH in cement paste has better chloride ion binding capacity. The incorporation of NS@LDH in mortar possess lower chloride ion migration coefficient. The incorporation of NS@LDH in mortar possess lower chloride ion diffusion coefficient.
Abstract The built-in limitations of the separate use of nano-SiO2 (NS) and layered double hydroxides (LDH) necessitate their combined use for improving the resistance of chloride transport into concrete. This study investigates the effect of a novel nano-SiO2@MgAl-LDH (NS@LDH) core–shell material (fabricated by in-situ co-precipitation method) on chloride transport of cement mortar through a comparative experiment. The mechanical properties, chloride-bound isotherms, rapid chloride migration (RCM), and chloride natural diffusion of mortar specimens were measured. The results show that the addition of NS@LDH improves both the compressive and flexural strength of mortar. Compared to mortars incorporating NS and LDH separately, the NS@LDH incorporated mortars exhibit a higher resistance to chloride transport. The chloride diffusion coefficient of the 2 % NS@LDH incorporated mortar is the lowest (reduced by 79 %). The NS@LDH induced combined effect of a significantly increased chloride-bound ability and refined microscopic structures contributes to the elevated resistance to chloride transport.
Laboratory investigation of the chloride ingress into cement mortar incorporating a novel core–shell nanomaterial
Zhou, Peng (author) / Xu, Jinxia (author) / Guo, Ming-Zhi (author) / Wang, Zihao (author)
2023-04-03
Article (Journal)
Electronic Resource
English
Chloride ingress in cement paste and mortar
| Tema Archive | 1999
PAPERS - Chloride ingress in cement paste and mortar
| Online Contents | 1999