Control of rheological and structural properties cement stone at the nanomodification

Abstract

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. It was found that the use of the synthesized CNA reduces the viscosity of the cement paste is 1.5 times, extends the setting time, provides in the first days of hardening strength increase by 4.5 times in comparison with the unmodified system. It is important that the optimum dosage of CNA is only 0.01% by weight of cement. Achieved effects are associated with the manifestation of the role of structure particles embryos substrate for crystallization centers tumors zoning.

Keywords

• system hardening cement
• complex nano-based additives of SiO2