The microstructural and thermal characteristics of silica nanoparticle-modified cement mortars after exposure to high temperatures. Part I

The microstructural and thermal characteristics of silica nanoparticle-modified cement mortars after exposure to high temperatures. Part I

Автор: Sikora P.

Журнал: Нанотехнологии в строительстве: научный интернет-журнал @nanobuild

Рубрика: Международный опыт

Статья в выпуске: 2 т.12, 2020 года.

Бесплатный доступ

This study presents an investigation of the effects of high temperature on the thermal and microstructural properties of cement mortars modified with nanosilica. In the first stage of the research, the effects of nanosilica (NS) and silica fume (SF) on the hydration and compressive strength of cementitious composites were compared. In the second stage, four different types of cement mortars, containing an optimal dosage of NS, were produced. Two of them contained a normal weight aggregate (quartz or limestone), whilst two contained a heavy weight aggregate (barite or magnetite). Specimens without NS were produced for control purposes. The specimens were exposed to 300, 450, 600 and 800°C, with their post-heating properties - including thermal conductivity, specific heat, solvent absorption and cracking behavior - analyzed. The results show that NS exhibits significantly higher reactivity with cement than SF. NS accelerates the cement hydration process and contributes more significantly to the 28 and 365 day compressive strength of mortar, as compared to SF...

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Cement mortar, nanosilica, elevated temperature, thermal properties, cracking

Короткий адрес: https://sciup.org/142223752

IDR: 142223752   |   DOI: 10.15828/2075-8545-2020-12-2-108-115

Список литературы The microstructural and thermal characteristics of silica nanoparticle-modified cement mortars after exposure to high temperatures. Part I

  • Matesova D., Bonen D., Shah S.P. Factors affecting the resistance of cementitious materials at high temperatures and me-dium[0] heating rates. Materials and Structures 2006, vol. 39, no. 455. DOI: 10.1007/s11527-005-9041-4
  • Kodur V., Khaliq W. Effect of temperature on thermal properties of different types of high-strength concrete. Journal of Materials in Civil Engineering. 2011, vol. 23, no. 6, pp. 793-801. DOI: 10.1061/(ASCE)MT.1943-5533.0000225
  • Mendes A., Sanjayan J.G., Collins F. Long-term progressive deterioration following fire exposure of OPC versus slag blended cement pastes. Materials and Structures. 2009, vol. 42, no. 1, pp. 95-101. DOI: 10.1617/s11527-008-9369-7
  • Sikora P., Abd Elrahman M., Stephan D. The influence of nanomaterials on the thermal resistance of cement-based com-posites-A review. nanomaterials. 2018, vol. 8, no. 7. DOI: 10.3390/nano8070465
  • Behnood A., Ziari H. Effects of silica fume addition and water to cement ratio on the properties of high-strength concrete after exposure to high temperatures. Cement and Concrete Composites. 2008, vol. 30, no. 2, pp. 106-112. DOI: 10.1016/j.cemcon-comp.2007.06.003
  • Ivanov L.A., Prokopiev P.S. The inventions in nanotechnologies as practical solutions. Part IV. Nanotechnologies in Construction. 2019, vol. 11, no. 4, pp. 447-457.
  • DOI: 10.15828/2075-8545-2019-11-4-447-457
  • Sikora P., Cendrowski K., Abd Elrahman M., Chung S-Y., Mijowska E., Stephan D. The effects of seawater on the hydration, microstructure and strength development of Portland cement pastes incorporating colloidal silica. Applied Nanoscience. 2019.
  • DOI: 10.1007/s13204-019-00993-
  • Mendes A., Sanjayan J.G., Gates W.P., Collins F. The influence of water absorption and porosity on the deterioration of cement paste and concrete exposed to elevated temperatures, as in a fire event. Cement and Concrete Composites. 2012, vol. 34, no. 9, pp. 1067-1074.
  • DOI: 10.1016/j.cemconcomp.2012.06.007
  • Yermak N., Pliya P., Beaucour A-L., Simon A., Noumowe A. Influence of steel and/or polypropylene fibres on the behaviour of concrete at high temperature: Spalling, transfer and mechanical properties. Construction and Building Materials. 2017, vol. 132, pp. 240-250.
  • DOI: 10.1016/j.conbuildmat.2016.11.120
  • Guelmine L., Hadjab H., Benazzouk A. Effect of elevated temperatures on physical and mechanical properties of recycled rubber mortar. Construction and Building Materials. 2016, vol. 126, pp. 77-85.
  • DOI: 10.1016/j.conbuildmat.2016.09.018
  • Ye Q., Zhang Z., Sheng L., Chen R. A comparative study on the pozzolanic activity between nano-SiO2 and silica fume. Journal of Wuhan University of Technology-Mater. Sci. Ed. 2006, vol. 21, pp. 153-157.
  • DOI: 10.1007/BF02840907
  • Krivenko P.V., Sanytsky M., Kropyvnytska T. The effect of nanosilica on the early strength of alkali-activated portland composite cements. Solid State Phenomena. 2019, vol. 296, pp. 21-26.
  • DOI: 10.4028/www.scientific.net/SSP.296.21
  • Hou P., Qian J., Cheng X., Shah S.P. Effects of the pozzolanic reactivity of nanoSiO2 on cement-based materials. Cement and Concrete Composites. 2015, vol. 55, pp. 250-258.
  • DOI: 10.1016/j.cemconcomp.2014.09.014
  • Potapov V.V., Efimenko Y.V., Gorev D.S. Determination of the amount of Ca(OH)2 bound by additive nano-SiO2 in cement matrices. Nanotehnologii v stroitel'stve = Nanotechnologies in Construction. 2019, vol. 11, no. 4, pp. 415-432.
  • DOI: 10.15828/2075-8545-2019-11-4-415-432
  • Mondal P., Shah S.P., Marks L.D., Gaitero J.J. Comparative study of the effects of microsilica and nanosilica in concrete. Transportation Research Record. 2010 vol. 2141, no. 1, pp. 6-9.
  • DOI: 10.3141/2141-02
  • Kropyvnytska T., Sanytsky M., Rucinska T., Rykhlitska O. Development of nanomodified rapid hardening clinker-efficient concretes based on composite Portland cements. Eastern-European Journal of Enterprise Technologies. 2019, vol. 6(6), no. 102, pp. 38-48.
  • DOI: 10.15587/1729-4061.2019.185111
  • Biricik H., Sarier N. Comparative study of the characteristics of nano silica - silica fume - and fly ash - incorporated cement mortars. Materials Research. 2014, vol. 17, no. 3, pp. 570-582.
  • DOI: 10.1590/S1516-14392014005000054
  • Vance K., Aguayo M., Dakhane A., Ravikumar D., Jain J., Neithalath N. Microstructural, mechanical, and durability related similarities in concretes based on OPC and alkali-activated slag binders. International Journal of Concrete Structures and Materials. 2014, vol. 8, no. 4, pp. 289-299.
  • DOI: 10.1007/s40069-014-0082-3
  • Shi C., Wang D., Wu L., Wu Z. The hydration and microstructure of ultra high-strength concrete with cement-silica fume-slag binder. Cement and Concrete Composites. 2015, vol. 61, pp. 44-52.
  • DOI: 10.1016/j.cemconcomp.2015.04.013
  • Kim T., Hong S., Seo K-Y., Kang C. Characteristics of ordinary portland cement using the new colloidal nanosilica mixing method. Applied Sciences. 2019, vol. 9, no. 20, pp. 4358.
  • DOI: 10.3390/app9204358
  • Singh L.P., Goel A., Bhattachharyya S.K., Ahalawat S., Sharma U., Mishra G. Effect of morphology and dispersibility of silica nanoparticles on the mechanical behaviour of cement mortar. International Journal of Concrete Structures and Materials. 2015, vol. 9, no. 2, pp. 207-217.
  • DOI: 10.1007/s40069-015-0099-2
  • Mehta P.K., Monteiro P.J.M. Concrete: Microstructure, Properties, and Materials. New York, USA, McGraw-Hill, 2006.
  • Wu Z., Lian H. High Performance Concrete. Beijing, China, China Railroad Publishing Company, 1999.
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