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Combined effect of chemical nature of fineness of mineral powders on Portland cement hydration

(2010) MATERIALS AND STRUCTURES. 43(5). p.665-673
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Abstract
This paper focuses on the influence of the chemical nature and the fineness of the fillers on the hydration process and on the compressive strength development. Four different types of fillers are considered in combination with Portland cement: quartzite filler, alumina filler, limestone filler, and silica fume. The study deals with blended mortars having a 0.45 water to powder (cement and filler) ratio with a 10% substitution of cement by filler. Quartzite fillers do not seem to accelerate the hydration process in a significant way. No positive effect is noticed on the strength development either. The presence of a fine inert alumina powder increases the rate of early hydration of Portland cement. The greater the fineness, the faster the rate of hydration heat development. This reactivity leads to an increase in the compressive strength at early age for mortar containing the finest alumina powders. In case of coarse alumina powder, no acceleration effect is obtained. Finely ground limestone (calcite) fillers promote heterogeneous nucleation of hydrates which significantly accelerates hydration. At early age, this also results in an increased mortar compressive strength in comparison with the control mortar. From the obtained results, it is clear that both chemical natures as well as fineness are important with regard to the accelerating effect of the hydration process. With increasing fineness, the accelerating effect increases. For powders with comparable fineness, it is clear that limestone powder has a more significant accelerating effect than silica fume and alumina filler. Quartzite filler seems to have no significant effect.
Keywords
MICROSTRUCTURE, SIMULATION, LIMESTONE, FILLER, FLY-ASH, COMPRESSIVE STRENGTH, SILICA FUME, Fineness, Silica fume, Quartzite filler, Alumina, Hydration, Calcite, PASTE, CALCIUM, CONCRETE

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Chicago
Kadri, EH, S Aggoun, Geert De Schutter, and K Ezziane. 2010. “Combined Effect of Chemical Nature of Fineness of Mineral Powders on Portland Cement Hydration.” Materials and Structures 43 (5): 665–673.
APA
Kadri, E., Aggoun, S., De Schutter, G., & Ezziane, K. (2010). Combined effect of chemical nature of fineness of mineral powders on Portland cement hydration. MATERIALS AND STRUCTURES, 43(5), 665–673.
Vancouver
1.
Kadri E, Aggoun S, De Schutter G, Ezziane K. Combined effect of chemical nature of fineness of mineral powders on Portland cement hydration. MATERIALS AND STRUCTURES. 2010;43(5):665–73.
MLA
Kadri, EH, S Aggoun, Geert De Schutter, et al. “Combined Effect of Chemical Nature of Fineness of Mineral Powders on Portland Cement Hydration.” MATERIALS AND STRUCTURES 43.5 (2010): 665–673. Print.
@article{1258727,
  abstract     = {This paper focuses on the influence of the chemical nature and the fineness of the fillers on the hydration process and on the compressive strength development. Four different types of fillers are considered in combination with Portland cement: quartzite filler, alumina filler, limestone filler, and silica fume. The study deals with blended mortars having a 0.45 water to powder (cement and filler) ratio with a 10\% substitution of cement by filler. Quartzite fillers do not seem to accelerate the hydration process in a significant way. No positive effect is noticed on the strength development either. The presence of a fine inert alumina powder increases the rate of early hydration of Portland cement. The greater the fineness, the faster the rate of hydration heat development. This reactivity leads to an increase in the compressive strength at early age for mortar containing the finest alumina powders. In case of coarse alumina powder, no acceleration effect is obtained. Finely ground limestone (calcite) fillers promote heterogeneous nucleation of hydrates which significantly accelerates hydration. At early age, this also results in an increased mortar compressive strength in comparison with the control mortar. From the obtained results, it is clear that both chemical natures as well as fineness are important with regard to the accelerating effect of the hydration process. With increasing fineness, the accelerating effect increases. For powders with comparable fineness, it is clear that limestone powder has a more significant accelerating effect than silica fume and alumina filler. Quartzite filler seems to have no significant effect.},
  author       = {Kadri, EH and Aggoun, S and De Schutter, Geert and Ezziane, K},
  issn         = {1359-5997},
  journal      = {MATERIALS AND STRUCTURES},
  keyword      = {MICROSTRUCTURE,SIMULATION,LIMESTONE,FILLER,FLY-ASH,COMPRESSIVE STRENGTH,SILICA FUME,Fineness,Silica fume,Quartzite filler,Alumina,Hydration,Calcite,PASTE,CALCIUM,CONCRETE},
  language     = {eng},
  number       = {5},
  pages        = {665--673},
  title        = {Combined effect of chemical nature of fineness of mineral powders on Portland cement hydration},
  url          = {http://dx.doi.org/10.1617/s11527-009-9519-6},
  volume       = {43},
  year         = {2010},
}

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