AbstractAbout AuthorsReferences
The article is devoted to the development of dry mixes with hollow ceramic microspheres and reinforcing fibers for the efficient light-weight masonry mortars with improved properties. Previously developed by the authors dry mixes with ceramic microspheres and light-weight masonry mortars based on them have a low average density, low thermal conductivity, high compressive strength, high specific strength, but insufficient crack resistance, frost resistance and durability of the mortar. One way of improvement of the properties of such mortars is the introduction of dispersed reinforcing fibers into their structure. In this study, the following types of fibers were used: basalt ones, glass ones, and two types of polymer fibers – polyacrylic and polypropylene ones. The research has been carried out according to standard methods. The basic properties of mortar mixtures and mortar have been determined; the dependences of the influence of consumption of various fiber types on the basic properties of mortars have been established, primarily, on the average density, compressive strength and tensile bending. The optimum composition of the dry masonry mixes with the hollow ceramic microspheres and the fiber were obtained, the results of microstructural analysis of samples are given. The dry masonry mix with hollow ceramic microspheres and polypropylene fibers having the compressive strength value of 14.5 MPa, the tensile strength in bending of 3.4 MPa and the average density of the dry mortar not more than 800 kg/m3 was developed.
V.S. SEMENOV, Candidate of Sciences (Engineering),
T.A. ROZOVSKAYA, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.Yu. GUBSKIY, Engineer,
R.R. GAREEVA, Engineer
T.A. ROZOVSKAYA, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.Yu. GUBSKIY, Engineer,
R.R. GAREEVA, Engineer
National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)
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2. Sheina S.G., Minenko A.N. Analysis and calculation of “cold bridges” in order to increase the energy efficiency of residential buildings. Inzhenernyj vestnik Dona: electronic scientific journal. 2012. No. 4 (1). http://www.ivdon.ru/uploads/article/pdf/131.pdf_1097.pdf (date of access 14.03.2016). (In Russian).
3. Gagarin V.G., Kozlov V.V. Prospects of increase of power efficiency of residential buildings in Russia. Vestnik MGSU. 2011. No. 3 (1), pp. 192–200. (In Russian).
4. Semenov V.S., Rozovskaya T.A. The dry masonry mixes with hollow ceramic microspheres. Nauchnoe obozrenie. 2013. No. 9, pp. 195–199. (In Russian).
5. Semenov V.S., Rozovskaya T.A. Improvement of energy efficiency of enclosing structures with the use of lightweight masonry mortars. Stroitel’nye Materialy [Construction Materials]. 2015. No. 6, pp. 16–19. (In Russian). 6. Semenov V.S., Rozovskaya T.A., Oreshkin D.V. Properties of the dry masonry mixtures with hollow ceramics microspheres. Advanced Materials Research. 2014. Vol. 860–863, pp. 1244–1247.
7. Inozemtsev A.S., Korolev E.V. Hollow micro-spheres is an efficient filler for high-strength lightweight concrete. Promyshlennoe i grazhdanskoe stroitel’stvo. 2013. No. 10, pp. 80–83. (In Russian).
8. Oreshkin D.V., Belyaev K.V., Semenov V.S., Kretova U.E. Hollow microspheres: an efficient filler for construction and backfill mortars. Promyshlennoe i grazhdanskoe stroitel’stvo. 2010. No. 9, pp. 50–51. (In Russian).
9. Teryaeva T.N., Kostenko O.V., Ismagilov Z.R., Shikina N.V., Rudina N.A., Antipova V.A. Physic-chemical properties of aluminosilicate hollow microspheres. Vestnik Kuzbasskogo gosudarstvennogo tehnicheskogo universiteta. 2013. No. 5, pp. 86–90. (In Russian).
10. Suryavanshi A.K., Swamy R.N. Development of lightweight mixes using ceramic microspheres as fillers. Cement and Concrete Research. 2002. Vol. 32, pp. 1783– 1789.
11. Korolev E.V., Inozemtcev A.S. Preparation and research of the high-strength lightweight concrete based on hollow microspheres. Advanced materials research. 2013. Vol. 746, pp. 285–288.
12. Klochkov A.V., Strokova V.V., Pavlenko N.V. Structural and heat insulating masonry admixture with hollow glass micro spheres. Stroitel’nye Materialy. 2012. No. 12, pp. 24–27. (In Russian).
13. Klochkov A.V., Pavlenko N.V., Strokova V.V., Belentsov Yu.A. On the question about the use of glass hollow microspheres for thermal-structural masonry mortars. Vestnik Belgorodskogo gosudarstvennogo tekhnologicheskogo universiteta im. V.G. Shukhova. 2012. No. 3, pp. 64–66. (In Russian).
14. Blanco F., García P., Mateos P., Ayala J. Characteristics and properties of lightweight concrete manufactured with cenospheres. Cement and Concrete Research. 2012. Vol. 30. No. 11, pp. 1715–1722.
15. Danilin L.D., Drozhzhin V.S., Kuvaev M.D., Kulikov S.A., Maksimova N.V., Malinov V.I., Pikulin I.V., Redyushev S.A., Khovrin A.N. Hollow microspheres of fly ash – a multifunctional filler for composite materials. Tsement i ego primenenie. 2012. No. 4, pp. 100–105. (In Russian).
16. Zhukov A.D., Bessonov I.V., Sapelin A.N., Naumova N.V. Increasing energy efficiency of wall materials with the help of cenospheres. Vestnik MGSU. 2014. No. 7, pp. 93–100. (In Russian).
17. Gubskiy A.Yu., Volchenko K.S. Investigation of the properties lightweight mortars with aluminosilicate microspheres. Construction is formation of the activity environment: proceedings of XVII International interuniversity scientific-and-practical conference of students, undergraduates, postgraduate students and young scientists. Moscow: MGSU. 2014, pp. 925–930. (In Russian).
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