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Particle size effect on the permeability properties of nano-SiO2 blended Portland cement concrete
Nano-SiO2, with both particle sizes of 15 nm (FN series) and 80 nm (CN series) added in small quantities, can improve the permeability properties of concrete by improving the cement paste and the interfacial transition zone (ITZ). By adding only small amounts of the nanoparticles (about 2 wt%) there is minimal cement replacement, which could be more cost-effective than adding larger percentages of other conventional pozzolans for improved concrete properties, especially in cold water, due to its high pozzolanic activity and specific surface. The percentage of water absorption in the presence of nano-SiO2 particles in both FN and CN series is lower than that of the control concrete. The effect is explained by the higher C-S-H (calcium silicate hydrate) gel formation in the presence of the nanoparticles. Concrete containing nanoparticles of the CN series shows higher reduction in water absorption than concrete containing nanoparticles of the FN series. By increasing the age of curing to 90 days, the percentage of water absorption values decreases significantly with the increase of nanoparticles content up to 2 wt% for both CN and FN series.
Particle size effect on the permeability properties of nano-SiO2 blended Portland cement concrete
Nano-SiO2, with both particle sizes of 15 nm (FN series) and 80 nm (CN series) added in small quantities, can improve the permeability properties of concrete by improving the cement paste and the interfacial transition zone (ITZ). By adding only small amounts of the nanoparticles (about 2 wt%) there is minimal cement replacement, which could be more cost-effective than adding larger percentages of other conventional pozzolans for improved concrete properties, especially in cold water, due to its high pozzolanic activity and specific surface. The percentage of water absorption in the presence of nano-SiO2 particles in both FN and CN series is lower than that of the control concrete. The effect is explained by the higher C-S-H (calcium silicate hydrate) gel formation in the presence of the nanoparticles. Concrete containing nanoparticles of the CN series shows higher reduction in water absorption than concrete containing nanoparticles of the FN series. By increasing the age of curing to 90 days, the percentage of water absorption values decreases significantly with the increase of nanoparticles content up to 2 wt% for both CN and FN series.
Particle size effect on the permeability properties of nano-SiO2 blended Portland cement concrete
Givi, Alireza Naji (author) / Rashid, Suraya Abdul (author) / Aziz, Farah Nora A. (author) / Salleh, Mohamad Amran Mohd (author)
Journal of Composite Materials ; 45 ; 1173-1180
2011
8 Seiten, 2 Bilder, 4 Tabellen, 35 Quellen
Article (Journal)
English
Particle size effect on the permeability properties of nano-SiO~2 blended Portland cement concrete
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