Nanotechnologies in Construction: A Scientific Internet-Journal

43-57

Authors: Shapovalov N.A., Poluektova V.A.

Rheological properties of highly concentrated dispersions, particle aggregate size of the dispersion phase and other colloid-chemical characteristics of suspensions used in the building industry are determined by the peculiarities of the boundary layer structure. The authors have identified the adsorption parameters of resole oligomers synthesized on the base of trifunctionl oxyphenyls on the following adsorbents: CaCO3, ZnO. The most potential adsorption pattern of phloroglucinefurfural nanomodificator molecules on the surface of chalk particles have been suggested in the work. It has been stated that the molecules of oxyphenyl oligomers are adsorbed on the surface of disperse material particles forming monomolecular layer.

87-101

Authors: Chernishov E.M., Slavcheva G.S., Artamonova O.V.

The efficiency of the use of nanotechnology solutions specially grown nanoparticles to regulate the rheological properties, the kinetics of setting and hardening of the modified cement stone. Modification of the cement stone structure was carried out using the synthesized authors complex nanomodifier (CNA) on the basis of SiO2 nanopar-ticles and superplasticizer GLENIUM®ACE 30 based on polycarboxylate. The originality of the author's approach is the method of synthesis and the method of administration of complex nanomodifier based on SiO2. CNA was prepared in an aqueous medium, which is then used both as a cement mixing water system.

124-143

Authors: Boldyrev A.M., Orlov A.S., Guschin D.A.

The chemical analysis of metal seam showed that introduction of titanium dioxide with MCA intensifies transition of Al2O3 from slag into metal pool and provides double concentration of titanium in the seam compared to the one which appears in the interaction of bathtub with melted flux AH-47 without TiO2 additives. The presence of oxides of titanium and aluminium of endogenous origin in the melt leads to formation of refractory particles with the center of TiO2 and Al2O3 in it. These particles are the centers of crystallization in the tail part of the molten pool and they remain in seam metal in the form of evenly distributed fine nonmetallic inclusions, which have crystallographic affinity with a matrix (α-iron). That provides the fine-grained seam structure with the raised and stable strength characteristics. This article compares the existing and developed technologies for production of MCA.