کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
257978 | 503604 | 2014 | 9 صفحه PDF | دانلود رایگان |
• GGBS refines pores and creates a distribution peak for pore range within 10 nm.
• GGBS tends to increase substantially the pore entrapment for MIP.
• Archie’s law is just roughly obeyed by GGBS incorporated materials.
• Pore self-desiccation is enhanced by low w/b and sealed curing.
• Self-desiccation percolates pores at μm level but densifies CSH at nm level.
This paper investigates the pore structure of cement-based materials with/without 70% ground granulated blastfurnace slag (GGBS). The emphasis is put on the effect of self-desiccation. Pore characterization parameters include total porosity, specific surface area (SSA), pore size distribution (PSD), pore entrapment and surface fractal dimension. The results show: (1) pore refinement by GGBS is evident and GGBS increases substantially the SSA and fractal dimension values; (2) the pore refinement moves pore distribution from the range of 10 nm–100 nm to that of <<10 nm; (3) the self-desiccation under sealed-curing creates a PSD peak in the range of >>100 nm and compacts the nanostructure of hydrates.
Journal: Construction and Building Materials - Volume 51, 31 January 2014, Pages 329–337