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  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
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RESEARCH OF BUILDING MATERIALS

POTENTIAL ANTISTATIC PROPERTIES OF A CEMENT COMPOSITION MODIFIED BY CHITOSAN

Vestnik MGSU 3/2012
  • Darchiya Valentina Ivanovna - Moscow State University of Civil Engineering (MSUCE) 8 (499) 183-32-92, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoeshosse, Moscow, 129337, Russia; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 105 - 107

Environmental compatibility of construction materials and their impact onto the human organism and the environment are the essential factors to be taken account of in the course of construction. Therefore, natural renewable biological polymers arouse interest. Polysaccharide chitin takes a special position among them. It represents one of the most widely spread biological polymers; it is extracted from 100% renewable materials. It is part of the external skeleton of crustaceans and insects, and it also part of cell walls of mushrooms and algae. Any research of potential materials to be generated from chitin and its derivative chitosan may involve a practical implementation. The research of the antistatic properties followed the introduction of 1% of chitosan into the cement composition. Electrostatic field intensity was measured by Electrostatic Field Intensity Meter ST-01. The electrostatic property of the sample modified by chitosan turned out to be lower than the one of the benchmark sample by 5.6 times. The presence of chitosan in the cement composition makes no impact on strength-related properties of the construction material. The cement composition modified by chitosan may be used in the manufacturing of antistatic self-leveling floors.

DOI: 10.22227/1997-0935.2012.3.105 - 107

References
  1. GOST R 51 317.4.2—2010. [State Standard of Russia 51 317.4.2—2010] Sovmestimost’ tekhnicheskikh sredstv elektromagnitnaya. Ustoychivost’ k elektrostaticheskim razryadam. Trebovaniya i metody ispytaniy [Electromagnetic Compatibility of Items of Equipment. Resistance to Electrostatic Discharge. Requirements and Testing Methods]. Moscow, 2010.
  2. GOST R ISO 14644-1—2002 [State Standard of Russia ISO 14644-1—2002]. Chistye pomescheniya i svyazannye s nimi kontroliruemye sredy [Clean Rooms and Associated Controlled Media]. Moscow, 2002.
  3. SanPin 2.1.2.1002—00. Sanitarno-epidemiologicheskie trebovaniya k zhilym zdaniyam i pomescheniyam [Sanitary and Epidemiological Requirements Applicable to Residential Buildings and Premises]. Moscow, 2000.

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Prevention of biogenic destruction by adding chitosan into the composition of cement

Vestnik MGSU 9/2012
  • Darchiya Valentina Ivanovna - Moscow State University of Civil Engineering (MGSU) Senior Lecturer, Department of General Chemistry, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Ustinova Yuliya Valerievna - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Associated Professor, Department of General Chemistry 8 (499) 183-32-92, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Nikiforova Tamara Pavlovna - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Deputy Chair, Department of General Chemistry, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Sazonova Nina Sergeevna - Moscow State University of Civil Engineering (MGSU Candidate of Technical Sciences, Associated Professor, Department of General Chemistry 8 (499) 183-32-92, Moscow State University of Civil Engineering (MGSU, 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 95 - 100

The objective of this research is to study the fungicidal properties of the cement composition
modified by chitosan (deacetylation rate - 95%, molecular weight - 200 kDm (MM 2,7x105)). The
optimal concentration of chitosan is identified so that its infusion into the cement paste did not deteriorate
the physical and mechanical characteristics, structure and composition of the latter. The
authors have identified that the infusion of 1% chitosan (in relation to the cement mass) into the
cement composition is optimal. It has resulted in (1) the slight improvement of the strength properties
of modified samples, (2) the reduction of dimensions of the porous space alongside with the
increase in the number of gel pores (20%), (3) the reduction of the number of capillary pores (5%).
The other subject of this research represents interaction of 1% (and lower concentrations of)
chitosan with calcium hydroxide. No interaction between 2% chitosan and calcium hydroxide is
identified. The conclusion is that the infusion of 1% chitosan into the cement composition provides
it with fungicidal and fungistatic properties, while the strength characteristic of the cement paste is
slightly improved.

DOI: 10.22227/1997-0935.2012.9.95 - 100

References
  1. Erofeev V.T., Smirnov V.F., Morozov A.E. Mikrobiologicheskoe razrushenie materialov [Microbiological Destruction of Materials]. Moscow, ASV Publ., 2008, p. 97.
  2. Rejane C. Go, Douglas de Britto, Odilio B. G. Assis. A review of the antimicrobial activity of chitosan // Pol?meros. 2009. vol. 19. no. 3. p. 5—12.
  3. Vol’fkovich Yu.M., Bagotskiy V.S., Sosenkin V.E., Shkol’nikov E.I. Metody etalonnoy porometrii i vozmozhnye oblasti ikh primeneniya v elektrokhimii [Methods of Benchmark Porometry and Potential Areas of Their Application in Electrochemistry]. Elektrokhimiya [Electrochemistry]. 1980, no. 11, vol. 16, pp. 162—165.
  4. Chervinets V.M., Bondarenko V.M., Albulov A.I., Komarov B.A. Antimikrobnaya aktivnost’ khitozana s raznoy molekulyarnoy massoy [Antimicrobial Activity of Chitosan That Has Different Values of Molecular Weight]. Proceedings of the 6th International Conference on New Advancements in the Study of Chitin and Chitosan. 2001, pp. 252—254.
  5. Darchiya V.I. Vliyanie khitozana na antistaticheskie svoystva tsementnoy kompozitsii [Influence of Chitozan on Antistatic Properties of the Cement Composition]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2012, no. 3, pp. 109—112.
  6. Skryabin K.P, Vikhoreva G.A., Varlamov V.P. Khitin i khitozan: Poluchenie, svoystva i primenenie [Chitin and Chitosan: Preparation, Properties and Application]. Moscow, Nauka Publ., 2002, p. 192.

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