FINE CONCRETE CONTAINING WATER, EXPOSED TO MECHANIC AND MAGNETIC TREATMENT, AND FLUIDIFIER
Pages 120 - 127
The subject of research is the effect of mechanic and magnetic treatment of different concentrations of the aqueous solution of fluidifier S-3 produced onto the concrete mix rheology, compressive strength and structure formation. Mechanic and magnetic treatment was performed by the pulsed rotor machine equipped with a permanent magnet. It is identified that mechanic and magnetic treatment of the water added into the fluidifier improves the flowability of the concrete mix in comparison with the flowability of the concrete mix prepared absent of treated water, although the amount of the fluidifier meets technical specifications. S-3 fluidifier content in the mix that has treated water is smaller than the same content in a standard mix by several hundreds of times. The concrete mix that has treated water demonstrates highest flowability. The water-to-cement ratio was fixed at 0.4 for all specimens under consideration. In addition, the concrete that has treated water and a minimal amount of S-3 fluidifier (5% of the cement mass) demonstrates that its compressive strength is by far higher than the one of the concrete prepared through the application of the conventional approach that contemplates a standard fluidifier consumption rate. Following a thermal analysis, a thermogravimetric analysis and an X-ray diffractometry, it was discovered that the application of treated water accompanied by the minimal consumption of S-3 fluidifier caused the structure of the concrete cement stone to be more compact, while it demonstrated higher crystallization and stronger interphase interaction. Therefore, considerable reduction in the consumption of S-3 fluidifier, coupled with mechanic and magnetic treatment of the water improves concrete strength properties while concrete flowability does not deteriorate.
DOI: 10.22227/1997-0935.2012.5.120 - 127
- Khigerovich M.I., Bayer V.E. Gidrofobno-plastifitsiruyushchie dobavki dlya tsementov, rastvorov i betonov [Water-repellent Fluidifiers Designated for Cements, Mortars and Concretes]. Moscow, Stroyizdat Publ., 1979, 126 p.
- Batrakov V.G. Modifitsirovannye betony. Teoriya i praktika [Modified Concretes. Theory and Practice]. Moscow, 1998, 768 p.
- Rebinder P.A. Poverkhnostnye yavleniya v dispersnykh sistemakh [Surface Phenomena Demonstrated by Disperse Systems]. Moscow, Kolloidnaya Khimiya [Colloid Chemistry], 1978, 368 p.
- Bessonova A.P., Stas’ I.E. Vliyanie vysokochastotnogo elektromagnitnogo polya na fizikokhimicheskie svoystva vody i ee spektral’nye kharakteristiki [Influence of High-Frequency Electromagnetic Field onto Physical and Chemical Properties of Water and Its Spectral Characteristics]. Polzunovskiy Vestnik [Polzunov Herald]. 2008, no. 3, pp. 305—309.
- Naberukhin Ju.N. Strukturnye modeli zhidkosti [Structural Liquid Models]. Moscow, Nauka Publ., 1981, 185 p.
- Fedosov S.V., Akulova M.V., Slizneva T.E., Strel’nikov A.N., Padokhin V.A. Izuchenie vliyaniya rezhimov mekhanomagnitnoy aktivatsii vodnogo rastvora tiosul’fata natriya razlichnykh kontsentratsiy na svoystva tsementnykh kompozitov [Study of Influence of Modes of Mechanic and Magnetic Treatment of Various Concentrations of the Aqueous Solution of Sodium Thiosulfate onto the Properties of Cement Composites]. Vestnik BGTU im. V.G. Shukhova [Herald of Shuchov BSTU]. 2010, no. 4, pp. 21—25.
- Fedosov S.V., Akulova M.V., Slizneva T.E., Kasatkina V.I. Opredelenie tekhnologicheskikh parametrov mekhanomagnitnoy aktivatsii vodnykh sistem s plastifitsiruyushchey dobavkoy [Identification of Process Parameters of Mechanic and Magnetic Treatment of Aqueous Systems that Contain Fluidifier]. Stroitel’nye Materialy [Building Materials]. 2010, no.3, pp.49—51.
- Vasil’ev E.K., Nakhmanson M.M. Kachestvennyy rentgenofazovyy analiz [Qualitative X-Ray Diffractometry Analysis]. Novosibirsk, Nauka Publ., 1986, 200 p.
- Klassen V.I. Omagnichivanie vodnykh sistem [Treatment of Aquatic Systems by a Magnet]. Moscow, Khimiya Publ., 1982, 296 p.