Error
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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

RESEARCH OF BUILDING MATERIALS

SCIENTIFIC AND TECHNICAL PRECONDITIONS FOR EXTRUDED LIGHTWEIGHT CEMENT SYSTEMS

Vestnik MGSU 3/2012
  • Oreshkin Dmitriy Vladimirovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Chair, Department of Construction Materials; +7 (499) 183-32-29., 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 .
  • Kaptsov Petr Vladimirovich - Moscow State University of Civil Engineering (MSUCE) postgraduate student, Department of Building Materials 8 (499) 183-32-29, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russia; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 115 - 119

The paper represents an overview of masonry mortars designated for walls made of small-size masonry units. The authors argue that regular mortars cannot demonstrate uniform heat transfer performance. Regular mortar walling has cold bridges. Cement-sand mortars have high cement and water consumption rates that boost mortar shrinkage and creep.
The paper also demonstrates that no surface effects or contact interaction between the cement grout and the surface of the sand and other aggregates are taken into consideration in connection with the above statement. Aggregates added to the mortar have a highly developed surface; they also feature a substantial supply of free energy. The authors believe that the extrusion method can make it possible to employ the free energy to improve the strength and other properties of the material in the course of formation of its structure.
This process may also improve the moistening and the adhesive strength of particles; it draws the cement particles as close to one another as it may be possible, it cleans their surface and extracts any excessive water out of the mix.
The paper also presents the results of the research of the microstructure of spilt Portland cement and hollow glass spheres, their mineral and chemical analyses, as well as the properties of masonry mortars. The paper presents a conclusion that their high process-dependent parameters and superior operating performance are attainable through the introduction of effective hollow glass spheres into masonry mortars and the application of the extrusion method. The aforementioned novelties may reduce the water consumption rate, improve the strength, freeze resistance and durability of cement mortars.
The preparation of this paper involved the study of nine reference books. This paper is the first one of a series of papers covering the method of extrusion of lightweight cement mortars.

DOI: 10.22227/1997-0935.2012.3.115 - 119

References
  1. Pashkevich A.A., Pervushin E.G., Oreshkin D.V. Polyesteklyannye mikrosfery i formirovanie tsementnykh sistem [Hollow Glass Microspheres and Formation of Cement Systems]. Collected works of Scientific and Technical Conference on Building Physics in the XXI Century. Moscow, NIISF, 2006, pp.134—139.
  2. Kirillov K.I., Pashkevich A.A., Pervushin E.G., Oreshkin D.V. Oblegchenny ykladochnyy rastvor [Lightweight mortar]. Collected works of Scientific and Technical Conference on Building Physics in the XXI Century. Moscow, NIISF, 2006, pp. 151—154.
  3. Oreshkin D.V., Pashkevich A.A., Pervushin E.G. Formirovanie struktur y tsementnykh sistem s polymisteklyannymi mikrosferami [Formation of the Structure of Cement Systems with Hollow Glass Microspheres]. Collected works of Scientific and Technical Conference in Ukhta, UGTU [Ukhta State Technical University], 2007, pp. 276—279.
  4. Kirillov K.I., Oreshkin D.V. Effektivnye kladochnye rastvory [Effective Mortars]. Collected works of Schientific and Technical Conference on Building Physics in the XXI Century. Moscow, NIISF, 2006, pp. 120—133.
  5. Oreshkin D.V., Belyaev K.V., Semenov V.S. Obshchaya skhema polucheniya oblegchennykh i sverkhlegkikh tsementnykh rastvorov [General Overview of Production of Lihtweight and Ultralight Cement Mortars], Stroitel’stvo neftyanykh i gazovykh skvazhin na sushe i na more [Construction of Onshore and Offshore Oil and Gas Wells], 2010, no. 11, pp. 32—33.
  6. Sakharov G.P. Nauchno-tekhnicheskie predposylki polucheniya ekstrudirovannogo melko-zernistogo betona [Scientific and Technical Prerequisites for Obtaining Extruded Fine-grained Concrete]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering], 2011, no. 4, pp. 483—485.
  7. Bazhenov Yu.M., Magdeev Yu.H., Alimov L.A., Voronin V.V., Goldenberg L.B. Melkozernistye betony [Fine-grained Concretes]. Moscow, ASV, 1998, 148 p.
  8. Bazhenov Yu.M. Tekhnologiya betona [Technology of Concrete]. Moscow, ASV, 2011, 528 p.
  9. Sakharov G.P., Tran Minh Dyk. Povyshenie svoystv melkozernistogo betona ekstrudirovaniem iskhodnykh smesey [Improving the Properties of Fine-grained Concrete by Extrusion of Original Mixtures]. Beton i zhelezobeton [Concrete and Reinforced Concrete], 2009, no. 1, pp. 6—8.
  10. Sakharov G.P. Ekstrudirovannyy melkozernistyy beton s povyshennymi kachestvennymi pokazatelyami [Better Quality Extruded Fine-grained Concrete]. Beton i zhelezobeton [Concrete and Reinforced Concrete], 2010, no. 4, pp. 2—7.

Download

Results 1 - 1 of 1