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Low-pressure nano-silica injection on cement for crack-healing and water transport

Maddalena, Riccardo, Mali, Amol and Hamilton, Andrea 2016. Low-pressure nano-silica injection on cement for crack-healing and water transport. Presented at: 10th International Conference on Structural Analysis of Historical Constructions (SAHC 2016), Leuven, Belgium, 13-15 September 2016. Published in: Van Balen, Koen and Verstynge, Els eds. Structural Analysis of Historical Constructions: Anamnesis, Diagnosis, Therapy, Controls Proceedings of the 10th International Conference on Structural Analysis of Historical Constructions. London: CRC Press, 10.1201/9781315616995

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Abstract

Durability of building materials is related to the presence of cracks since they provide a fast pathway to the transport of liquid and gasses through the structure. Restoration and preservation of historical buildings has been investigated through the application of novel cementitious materials using nanoparticles such as nano-silica and silica fume. The small particle size range and the high reactivity of nanoparticles allow them to interact with calcium sources naturally present in construction materials and forming binding and strengthening compounds such as calcium silicate hydrates. Nanoparticles act as a crack-filler agent, reducing the porosity and increasing the durability of the existing material. Injection of nano-silica was carried out at a low water pressure in hydrated cement paste. This novel technique can tailor mechanical and hydraulic properties of existing building materials simply and non-destructively.

Item Type: Conference or Workshop Item (Paper)
Date Type: Published Online
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TH Building construction
Publisher: CRC Press
ISBN: 9781315616995
Related URLs:
Date of First Compliant Deposit: 22 June 2020
Last Modified: 22 Jun 2020 13:15
URI: https://orca.cardiff.ac.uk/id/eprint/132647

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