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Технология и свойства тяжелого бетона на основе эффективных гидрофобизирующих органоминеральных модификаторов типа омд

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сынылан ОМД-МС текті модификатор са жне оймалжын кеуектеріні лесін айтарлытай лайту жолымен (70%) цемент тасыны жаа сапалы микрорылымын алуа ммкіндік береді. ОМД-МС модификаторымен дайындалан бетонны беріктігі стемесіз дайындалан бетонны беріктігінен 1,7...1,8 есе жоары, ал кпке млім С-3 ТСН модификаторы осылан бетоннан беріктігі 50% жоары екені аныталды.

ОМД-МС модификаторлы бетонны деформативті-беріктік асиеттері жасартылды, стемесіз бетонны асиетімен салыстырандаы соылы-динамикалы серге арсылыы артты (3 – 3,6 есе), сужтуы мен капиллярлы соруы тмендеді (2 – 2,5 есе), аязатзімділігі, коррозияатзімділігі жоарлады.

олдану аумаы:

сынылан зартпалы сердегі ОМД-МС модификаторы жалпы функционалды крсеткіштеріне араанда физико-техникалы жне пайдалану асиеттері жоары бетон алуа ммкіндік береді.

Экономикалы тиімділігі:

органоминералды ОМД-МС модификаторды олданылан цементті материалдарды алу технологиясын енгізуді экономикалы тиімділігі 1м3 412,5 тегені райды (2009ж. баамен).

Зерттеу нысаныны дамуы туралы болжамалы жорамалдар:

сынылан жмыс ылыми-тжірбиелік ндылыымен азіргі заманы бсекеге абілетті, беріктікті, тыыздыты, аязатзімділікті, коррозияа тзімділікті жне баса да бетонны олдану асиеттеріні жоары крсеткіштерін амтамасыз ететін зартпалы сердегі модификаторларды ндіруді ылыми-техникалы талаптарына сай келеді.

RESUME

RAKHIMOVA GALIYA MUKHAMEDIEVNA

Technologies and properties of the heavyweight concrete based on water-repelling organic - mineral modifiers of the OMD-M type

05.23.05 Building materials and products

The object of the research:

effective energy and resource saving technologies of modified building materials and products permit to reduce their production costs substantially and to provide the preset complex with building and technical properties.

The aim of the research:

the development of organic - mineral water-repelling modifiers of prolonged action of OMD-M type providing to obtain effective heavyweight concrete with high physical and technical properties.

Methods of implementation of the work:

there have been used standard and conventional non-standard research methods, developed by leading scientific research and educational institutes. For substance composition research of raw materials, phase and structural transformation there have been used complex methods of physical-chemical analysis, including microscopic analysis, differential-thermal analysis, X-ray structural and X-ray spectral analysis, electron microscopy. Structural porosity of the cement stone and cement mix were investigated by methods of mercury porosimetry, light microscopy and dilatometry. The planning of the experiments and processing of the results were done by methods of mathematical statistics.

The results of the work:

there has been developed the composition of the water-repelling organic-mineral modifier of the OMD –Ms type taking into account the display of all functions of the modifier ingredients both at the preparation stage in the form of granulated powder and at the stage of their complex action in the cement paste and the concrete.

The results obtained may be regarded as an intermediate step on the way to nanotechnology application in the production of high quality concrete, reliable and long-term durable concrete and reinforced concrete products and constructions, providing road building, construction of buildings with long-span structures of modern architecture.

Basic construction, technological and technical operation characteristics:

there has been developed the technological scheme preparation of the water-repelling organic-mineral modifier of the OMD –Ms type with agglomeration of the modifier ingredients in the entrained air -hung state.

The obtained granulated modifier OMD-MS is uniformly graded, well dissolved in water and can be sweepingly exposed in the powder dispenser of the RPA type before used in the concrete. There have been optimized the compositions of the heavyweight concrete by the mathematical experiment planning method with interpolation of experiment values using Lagrange polynom.

It was found that the optimal concentration value of the organic - mineral modifier is equal to - 12% of the cement mass at the water/cement ratio (w/c) = 0, 35 and 400 kg/m3 of the Portland cement concentration. The research showed that the concrete reached compressive strength to 65 MPa after 28- days age of the normal hardening and water absorption was equal to 2%.

Incorporating the water-repelling organic - mineral modifier of OMD-MS type to the water-cement paste in optimal proportion makes its plasticity properties better: the water-cement paste of normal consistency is made using lower water-cement ratio to 25 …27%.

It was stated that the use of the water-repelling organic - mineral modifiers of OMD-MS type permits to obtain high-flow concrete mix with wide range of workability (cone slump to 20-22cm), prevents its segregation (segregation is in 2,6 times lower comparing to the concrete mix without modifier) and water-separation (reduction of water-separation in ten times).

The suggested modifier of the OMD-MS type permits to obtain the microstructure of new quality cement stone by means of substantial fine and gel pore increase (to 70%). It was stated that the concrete with OMD-MS modifiers is in 1.7 … 1.8 times higher in strength than the concrete without admixture and in 50% higher than the concrete with the well-known modifier S-3 plus TSN.

There have been improved deformation and mechanical properties of the concrete with OMD-MS modifiers, its impact strength has been increased (in 3-3,6 times) in comparison with the properties of the concrete without additions, water absorption and capillary suction have been reduced, frost resistance, stainless property and wear resistance properties have been significantly increased.

Field of application:

the introduced modifier OMD-MS with prolonged action in total of its functional effects permits to obtain the concrete with high physical-technical and operating properties.

Economic efficiency:

the economic efficiency of the introduced new technology for obtaining cement materials using organic - mineral modifier OMD-MS is about 412,5 tenge per 1m3 of the concrete (prices of 2009).

Forecasting the development of the subject studied:

the suggested work in its scientific and technical significance meets the modern scientific and technical requirements in the development field of competitive modifiers of prolonged action, providing high strength index, consistency value, permeability, frost resistance index, stainless property index and other operating characteristics of the concrete.

Подписано к печати «20 » июля 2010 г.

Формат 60х84/16. Печать офсетная. Бумага офсетная.

Объем 1,2 п.л.

________Тираж 100 экз. Заказ № 236_______________

Типография НЦ НТИ РК

050026, г. Алматы, ул. Богенбай батыра, 221



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