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http://yadda.icm.edu.pl:443/baztech/element/bwmeta1.element.baztech-a70a1c7f-0f7c-49c5-b61a-104e0ec532f0

Czasopismo

Journal of Ecological Engineering

Tytuł artykułu

The Influence of Silica Fume on the Mechanical and Thermal Parameters of Portland Cement Concretes

Autorzy Strzałkowski, Jarosław  Garbalińska, Halina 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
Abstrakty
EN The influence of the silica fume (SF) addition on the basic mechanical and thermal parameters of cement concrete was presented in this paper. Numerous studies show that the specific properties of silica fume allow producing concretes with increased strength and durability properties. However, the results of the authors' own studies demonstrated that under specific circumstances, the SF addition can negatively affect the strength of cement concrete. In this paper, the concretes made from two types of coarse aggregate, 4–8 mm fraction: reference ordinary gravel aggregate (Ref) and broken basalt aggregate (Bas) were tested. Comprehensive tests (microstructural, strength and thermal) were carried out on three formulas: the first one (Ref-0) did not contain any additives or admixtures. Silica fume and superplasticizer were used in the second formula (Ref-8), introduced in the amount of 8% and 0.75% of the cement’s weight, respectively. The third formula, based on basalt aggregate (Bas-8), also contained silica fume and a superplasticizer, dosed in the same amount as in the second formula. Porosimetric studies showed that the use of silica fume in the Ref-8 formula resulted in a decrease in the number of pores smaller than 0.15 μm in comparison to the Ref-0 reference concrete without the silica fume. On the other hand, numerous additional pores with diameters ranging from 0.05 to 300 μm were found in the Bas-8 concrete. In turn, optical porosimetry proved that the basalt-based concrete had numerous pores in the range above 70 μm, which were not observed in the case of the concretes with ordinary pebble aggregate. In the case of the normal concrete, the addition of silica fume resulted in an increase in the compressive strength. However, the basalt-based concrete, due to its much higher porosity, achieved significantly lower strength values. The results showed that the observed changes in porosity, caused by the presence of silica fume, resulted in lower values of thermal conductivity and specific heat of mature composites that it had been added to. This was particularly evident for the basalt-based concrete.
Słowa kluczowe
EN silica fume   thermal properties   compressive strength   porosity ordinary gravel aggregate   basalt aggregate  
Wydawca Polskie Towarzystwo Inżynierii Ekologicznej
Czasopismo Journal of Ecological Engineering
Rocznik 2019
Tom Vol. 20, nr 9
Strony 95--102
Opis fizyczny Bibliogr. 16 poz., rys., tab.
Twórcy
autor Strzałkowski, Jarosław
  • Department of Building Physics and Building Materials, Faculty of Civil Engineering and Architecture, West Pomeranian University of Technology Szczecin, al. Piastów 50, 70-311 Szczecin, Poland
autor Garbalińska, Halina
  • Department of Building Physics and Building Materials, Faculty of Civil Engineering and Architecture, West Pomeranian University of Technology Szczecin, al. Piastów 50, 70-311 Szczecin, Poland, Halina.Garbalinska@zut.edu.pl
Bibliografia
1. Abd Elhakam, A., Mohamed, A.E., Awad, E., 2012. Influence of self-healing, mixing method and adding silica fume on mechanical properties of recycled aggregates concrete. Construction and Building Materials 35, 421–427. https://doi.org/10.1016/j.conbuildmat.2012.04.013
2. Horszczaruk, E., Brzozowski, P., 2019. Investigation of gamma ray shielding efficiency and physicomechanical performances of heavyweight concrete subjected to high temperature. Construction and Building Materials 195, 574–582. https://doi.org/10.1016/j.conbuildmat.2018.09.113
3. Khan, M., Ali, M., 2019. Improvement in concrete behavior with fly ash, silica-fume and coconut fibres. Construction and Building Materials 203, 174–187. https://doi.org/10.1016/j.conbuildmat.2019.01.103
4. Khodabakhshian, A., Ghalehnovi, M., de Brito, J., Asadi Shamsabadi, E., 2018. Durability performance of structural concrete containing silica fume and marble industry waste powder. Journal of Cleaner Production 170, 42–60. https://doi.org/10.1016/j.jclepro.2017.09.116
5. Li, L.G., Zheng, J.Y., Zhu, J., Kwan, A.K.H., 2018. Combined usage of micro-silica and nano-silica in concrete: SP demand, cementing efficiencies and synergistic effect. Construction and Building Materials 168, 622–632. https://doi.org/10.1016/j.conbuildmat.2018.02.181
6. Mehta, A., Ashish, D.K., 2019. Silica fume and waste glass in cement concrete production: A review. Journal of Building Engineering 100888. https://doi.org/10.1016/j.jobe.2019.100888
7. Pedro, D., de Brito, J., Evangelista, L., 2018. Durability performance of high-performance concrete made with recycled aggregates, fly ash and densified silica fume. Cement and Concrete Composites 93, 63–74. https://doi.org/10.1016/j.cemconcomp.2018.07.002
8. Pedro, D., de Brito, J., Evangelista, L., 2017. Evaluation of high-performance concrete with recycled aggregates: Use of densified silica fume as cement replacement. Construction and Building Materials 147, 803–814. https://doi.org/10.1016/j.conbuildmat.2017.05.007
9. Siddique, R., Jameel, A., Singh, M., BarnatHunek, D., Kunal, Aït-Mokhtar, A., Belarbi, R., Rajor, A., 2017. Effect of bacteria on strength, permeation characteristics and micro-structure of silica fume concrete. Construction and Building Materials 142, 92–100. https://doi.org/10.1016/j.conbuildmat.2017.03.057
10. Sikora, P., Abd Elrahman, M., Horszczaruk, E., Brzozowski, P., Stephan, D., 2019. Incorporation of magnetite powder as a cement additive for improving thermal resistance and gamma-ray shielding properties of cement-based composites. Construction and Building Materials 204, 113–121. https://doi.org/10.1016/j.conbuildmat.2019.01.161
11. Sikora, P., Augustyniak, A., Cendrowski, K., Horszczaruk, E., Rucińska, T., Nawrotek, P., Mijowska, E., 2016. Characterization of Mechanical and Bactericidal Properties of Cement Mortars Containing Waste Glass Aggregate and Nanomaterials. Materials (Basel) 9. https://doi.org/10.3390/ma9080701
12. Skoczylas, K., Rucińska, T. (a), 2018. Strength and durability of cement mortars containing nanosilica and waste glass fine aggregate. Cem. Wapno Beton 23, 206–215.
13. Skoczylas, K., Rucińska, T. (b), 2018. The effects of waste glass cullets and nanosilica on the long-term properties of cement mortars. E3S Web Conf. 49, 1–9. https://doi.org/10.1051/e3sconf/20184900102
14. Uysal, M., Al-mashhadani, M.M., Aygörmez, Y., Canpolat, O., 2018. Effect of using colemanite waste and silica fume as partial replacement on the performance of metakaolin-based geopolymer mortars. Construction and Building Materials 176, 271–282. https://doi.org/10.1016/j.conbuildmat.2018.05.034
15. Xie, J., Huang, L., Guo, Y., Li, Z., Fang, C., Li, L., Wang, J., 2018. Experimental study on the compressive and flexural behaviour of recycled aggregate concrete modified with silica fume and fibres. Construction and Building Materials 178, 612–623. https://doi.org/10.1016/j.conbuildmat.2018.05.136
16. Xie, J., Li, J., Lu, Z., Li, Z., Fang, C., Huang, L., Li, L., 2019. Combination effects of rubber and silica fume on the fracture behaviour of steel-fibre recycled aggregate concrete. Construction and Building Materials 203, 164–173. https://doi.org/10.1016/j. conbuildmat.2019.01.094
Kolekcja BazTech
Identyfikator YADDA bwmeta1.element.baztech-a70a1c7f-0f7c-49c5-b61a-104e0ec532f0
Identyfikatory
DOI 10.12911/22998993/112503