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Information × Registration Number 0308U001222, 0107U004253 , R & D reports Title Improvement of the manufacture technology of low cement aluminaspinel vibration and mullitecorundum self-flow concrete mixes, the production technologe mastering of low cementalumina spinel concrete mix of perfected composition and manufacture trial lots. popup.stage_title Удосконалення технології виготовлення низькоцементних глиноземошпінельної вібраційної та мулітокорундової самотекучої бетонних сумішей, освоєння технології виготовлення низькоцементної глиноземошпінельної бетонної суміші удосконаленого складу і випуск дослідних партій. Head Babkina L., Registration Date 25-01-2008 Organization The open joint stock company " The Ukrainian research institute of refractories named A.S.Berezhnoy" popup.description2 The research subject is low cement alumina spinel vibration and mullite corundum self-flowing concrete mixes. The purpose of the work is mastering production technology of low cement concrete mix of improved composition under conditions of OJSC "The Ukrainian research institute of refractories named after A.S. Berezhnoy". The research methods are physicochemical, petrographic, electron microscopic, X-ray diffraction, physical-mechanical and thermo-mechanical ones. The process researches, flowing by low cement concrete mix hardening and heat treatment with studying phase formation at different heat treatment levels, were carried out by means of using X-ray diffraction analysis and electron microscopy in OJSC "The Ukrainian research institute of refractories named after A.S. Berezhnoy". On the bases of research results it has been proved the necessity of using as a hydraulically solidifying binder low cement alumina spinel concrete mix of monocalcium aluminate cement of CA-270 containing an addition of active alumina which makes by water tempering hydration forms (hydrarhillite and boehmite) preventing concrete mix strength decay by hardening under high temperature conditions and enabling relaxation of internal strengths which can result in distress and complete lining destruction. Taking into account multigraded character of destruction of calcium hydroaluminate determined as a result of researches and temperature intervals by which the larger part of water is eliminated from the castables under research, earlier determined drying - heating performance of steel teeming ladles with lining from low cement alumina spinel castables was confirmed: temperature rise up to 150°C - 2 hrs; aging by 150°C - 10 hrs; temperature rise from 150 to 300°C - 5 hrs; aging by 300°C - 10 hrs; temperature rise from 300 to 500°C - 5hrs; aging by 500°C - 5hrs; optional rise up to 1000°C. Contrastive researches of aggregate grain composition influence and different dispersing agents (ADS-1, ADW-1, Castament FS-10, Castament FW-10)on low cement mullite corundum self-flowing concrete mix properties have been carried out. As a result of analyses research there has been determined the opportunity of using normal electrocast corundum with maximum grain size - 3 mm as low cement mullite corundum self-flowing concrete mix aggregate, as a dispersing agent along with introducing into composition concrete mix in the amount of 1% of ADS-1 addition (over 100%), ADW-1 in proportion 0,75:0,25, dispersing agent Castament FS-10, Castament FW-10 which is being introduced into concrete mix composition in the amount of 0,1% (over 100%) in proportion 0,05:0,05. The indicated composition of СМКНЦБС-1 is recommended for production and application. In accordance with normative documentation requirements the production of a new product type - low cement vibration alumina spinel of СГШНЦОБ-1 and self-flowing mullite corundum of СМКНЦБС-1 of concrete mixes - has been mastered in pilot production of OJSC "The Ukrainian research institute of refractories named after A.S. Berezhnoy". Low cement self-flowing mullite corundum concrete mix pilot batches have been produced. The research subject is low cement alumina spinel vibration and mullite corundum self-flowing concrete mixes. The purpose of the work is mastering production technology of low cement concrete mix of improved composition under conditions of OJSC "The Ukrainian research institute of refractories named after A.S. Berezhnoy". The research methods are physicochemical, petrographic, electron microscopic, X-ray diffraction, physical-mechanical and thermo-mechanical ones. The process researches, flowing by low cement concrete mix hardening and heat treatment with studying phase formation at different heat treatment levels, were carried out by means of using X-ray diffraction analysis and electron microscopy in OJSC "The Ukrainian research institute of refractories named after A.S. Berezhnoy". On the bases of research results it has been proved the necessity of using as a hydraulically solidifying binder low cement alumina spinel concrete mix of monocalcium aluminate cement of CA-270 containing an addition of active alumina which makes by water tempering hydration forms (hydrarhillite and boehmite) preventing concrete mix strength decay by hardening under high temperature conditions and enabling relaxation of internal strengths which can result in distress and complete lining destruction. Taking into account multigraded character of destruction of calcium hydroaluminate determined as a result of researches and temperature intervals by which the larger part of water is eliminated from the castables under research, earlier determined drying - heating performance of steel teeming ladles with lining from low cement alumina spinel castables was confirmed: temperature rise up to 150°C - 2 hrs; aging by 150°C - 10 hrs; temperature rise from 150 to 300°C - 5 hrs; aging by 300°C - 10 hrs; temperature rise from 300 to 500°C - 5hrs; aging by 500°C - 5hrs; optional rise up to 1000°C. Contrastive researches of aggregate grain composition influence and different dispersing agents (ADS-1, ADW-1, Castament FS-10, Castament FW-10) on low cement mullite corundum self-flowing concrete mix properties have been carried out. As a result of analyses research there has been determined the opportunity of using normal electrocast corundum with maximum grain size - 3 mm as low cement mullite corundum self-flowing concrete mix aggregate, as a dispersing agent along with introducing into composition concrete mix in the amount of 1% of ADS-1 addition (over 100%), ADW-1 in proportion 0,75:0,25, dispersing agent Castament FS-10, Castament FW-10 which is being introduced into concrete mix composition in the amount of 0,1% (over 100%) in proportion 0,05:0,05. The indicated composition of СМКНЦБС-1 is recommended for production and application. In accordance with normative documentation requirements the production of a new product type - low cement vibration alumina spinel of СГШНЦОБ-1 and self-flowing mullite corundum of СМКНЦБС-1 of concrete mixes - has been mastered in pilot production of OJSC "The Ukrainian research institute of refractories named after A.S. Berezhnoy". Low cement self-flowing mullite corundum concrete mix pilot batches have been produced. The work shall be continued in the line of further production technology development of low cement alumina spinel and mullite corundum concrete mixes.The work shall be continued in the line of further production technology development of low cement alumina spinel and mullite corundum concrete mixes. Product Description popup.authors popup.nrat_date 2020-04-02 Close