Effect of nanosilica particle size on the water permeability, abrasion resistance, drying shrinkage, and repair work properties of cement mortar containing nano-SiO2

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Author list: Haruehansapong S., Pulngern T., Chucheepsakul S.

Publisher: Hindawi

Publication year: 2017

Journal: Advances in Materials Science and Engineering (1687-8434)

Volume number: 2017

ISSN: 1687-8434

eISSN: 1687-8442

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85018798781&doi=10.1155%2f2017%2f4213690&partnerID=40&md5=fc639b03173b8722e5ae8b63c3318a1b

Languages: English-Great Britain (EN-GB)

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Abstract

This work presents the effect of nanosilica particle sizes on durability properties and repair work properties of cement mortar containing nanosilica (NS). Three different NS particle sizes of 12, 20, and 40 nm were used and compared with those of cement mortar without NS and cement mortar with silica fume (SF). Interesting results were obtained in which the particle size of NS affected directly the abrasion resistance and water permeability. NS with particle size of 40 nm is the optimum size and gave the highest abrasion resistance and water permeability. For repair work properties, cement mortars containing NS (12 and 20 nm) and SF experienced higher drying shrinkage than that of cement mortar without NS and then presented cracking behavior and debonding between the cement mortars and concrete substrate. Cement mortar containing 40 nm of NS gave the lowest drying shrinkage, the lowest crack number, and the highest adhesive strength. These results indicate that the particle size of NS affected not only the durability properties but also the repair work properties of cement mortar. ฉ 2017 Sattawat Haruehansapong et al.

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