The effect of carbon nanotube additives on the structure and properties of calcium sulfate hemihydrate
Journal Title: Вісник Одеської державної академії будівництва та архітектури - Year 2018, Vol 1, Issue 71
Abstract
Problem statement. In recent years, development of nanostructured materials with the use of carbon nanotubes (СNT) has become one of the most topical trends in modern nanomaterials science due to their mechanical, chemical and electronic properties. Purpose. The investigation of the effect of carbon nanotubes on the structure and physical and mechanical properties of calcium sulfate hemihydrate. Conclusion. The research conducted to evaluate ultimate bending strength and ultimate compressive strength as well as water-gypsum ratio of test beams at 2 hours has shown that an increased content of the nanoadditive causes the improvement of structural characteristics of the composite material. Given the same content of the nanomodifier in a calcium sulfate matrix, maximum increase in compressive strength of 27-29% has been achieved by using carbon nanotubes (CNTs) and hydroxyl groups. Using non-modified carbon nanotubes in the presence of the additive has provided an increase in strength of 13-15% only. Chemical functionalization of the surface of carbon nanotubes promotes reduced sedimentation effect inherent to nanoparticles; moreover, it makes it possible to achieve a more uniform nanostructure dispersion throughout the modified material volume and provides chemical interaction between the substance matrix and nanotubes. Interaction of calcium sulfate dihydrate molecule with graphene-like surface is a chemical process, which has been proved by methods of quantum chemical analysis. The improved strength of CNT-containing gypsum composite has been achieved due to the accelerated process of calcium sulfate dihydrate crystallization at the graphene surface.
Authors and Affiliations
Viktor Derevianko, N. V. , Kondratieva, H. M. , Hryshko
Keywords
Related Articles
- EP ID EP510794
- DOI -
- Views 142
- Downloads 0
A method of solving problems in statistical dynamics for the reliability assessment of complex technical systems with limited internal parameters of the system
This work was further develops the method of solving problems in statistical dynamics within the reliability assessment of complex technical systems. In applying the method of statistical tests (Monte Carlo) to assess th...
Comparative estimation of wear-resistance of steel and rubber coverages of surfaces of constructions of enterprises of mining and metallurgical complex at shock loading
As lining-up materials of surfaces of bunkers, lowering of ore, shifting knots directly contacting with the processed material, wear-proof rubbers are widely used. Further introduction of rubberized coats instead of the...
Experimental determination of the wetting contact angle in nanomodified ceramic glaze
The article deals with the classification of nanomaterials and the possibilities of their use in manufacture of construction ceramics and ceramic glaze. The research is aimed at determining possible ways of applying nano...
Some questions of stability of multi-span continuous rods
The paper is devoted to some problems of stability of straight continuous rods simply supported at the ends and having one or more intermediate rigid or elastic roller supports compressed by axial force constant along th...
Research of slab patterns from ceramsite concrete on multicomponent astringent
The results of the experimental research of load-bearing capacity and deformation capacity of patterns of the assembly- monolithic and monolithic slab from сeramsite concrete on multicomponent astringent and quartz sand...