Mechanical, rheological, durability and microstructural properties of high performance self-compacting concrete containing SiO2 micro and nanoparticles

By Mostafa Jalal, E. Mansouri, M. Sharifipour, A. Pouladkhan. 2012

361 citations recorded by the source corpus.

Abstract In this paper, mechanical, rheological, durability and microstructural properties of high performance self compacting concrete (HPSCC) incorporating SiO 2 micro and nanoparticles have been investigated. For this purpose, a fraction of Portland cement was replaced by different amounts of microsilica, nanosilica and blend of micro and nanosilica as 10%, 2% and 10% + 2% respectively. Three different binder contents as 400, 450 and 500 kg/m 3 with a constant water to binder ratio ( w / b = 0.38) were investigated. Rheological properties were determined through slump flow time and diameter, V -funnel flow time and L -box tests and mechanical characteristics were determined. Durability properties were evaluated by water absorption, capillary absorption, Cl ion percentage and resistivity tests. Microstructure of the concrete was also assessed via scanning electron microscopy (SEM). The results showed that the properties improved significantly for the specimens containing micro and nanosilica. Improvement of Cl ion percentage and resistivity results in the micro and nanosilica blended mixtures was also noticeable. From the microstructure point of view, the SEM micrographs showed more refined and packed pore structure of the concrete containing admixtures especially at longer ages which could lead to enhancement of strength and the durability properties of HPSCC specimens.

Subfields: Civil and Structural Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/71b6046725b729f4cc380625769fddca34cfcb95

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Citations in the corpus

Single and combined effects of nano-SiO2, nano-Al2O3 and nano-TiO2 on the mechanical, rheological and durability properties of self-compacting mortar containing fly ash (2015, neutral): “Published studies have also revealed that the homogeneous and uniform concrete cannot be produced by even the perceived full compaction [5,6].”
Sorptivity and acid resistance of ambient-cured geopolymer mortars containing nano-silica (2016, background): “44 Improvements in the mechanical properties of a cementitious matrix by the addition 45 of nano materials were reported by numerous studies [10-13].”
The effect of water to cement ratio on fracture parameters and brittleness of self-compacting concrete (2013, background): “Self-compacting concrete (SCC) is able to flow and compact under its own weight, filling the molds even in the presence of congested reinforcement and restricted area while maintaining its uniformity for a long time without any bleeding or segregation due to excessive vibration [1].”
High-performance fiber-reinforced concrete: a review (2016, background): “Mater 71:35–43 [283] Jalal M, Mansouri E, Sharifipour M, Pouladkhan AR (2012) Mechanical, rheological, durability and microstruc-”