Strength Enhancement of Concrete with a Plasticizer on the Basis of Nano-Structured Carbon

Жданок, С. А.; Полонина, Е. Н.; Леонович, С. Н.; Хрусталев, Б. М.; Koleda, E. A.

doi:10.31659/0585-430x-2018-760-6-67-72

Cited by 6 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Nanoindentation first of all shows differences in structure, and such significant differences between samples with nanoparticles № 2, 3, 4 and sample № 1 without nanoparticles have already been identified, and these differences must be attributed to the action of nanoparticles [9][10][11][12].…”

Section: Methodsmentioning

confidence: 99%

Nanoindentation of cement stone samples

et al. 2020

View full text Add to dashboard Cite

The preliminary results of the studied cement samples were obtained by the nanoindentation method. It was revealed that the elastic modulus M increases in samples that contain a complex additive containing nanosized particles. The effect is also observed with the introduction of an additive containing only one type of nanoparticles (nanosilica sol SiO2 or carbon nanomaterial MCNT). The selection of the parameters of the nanoindentation method, which ensured the obtaining of the final consistent results, was performed. These results are presented by histograms of the distribution of nanoindentation points in modulus of elasticity M and hardness H and distributions in M and H in the horizontal XY plane perpendicular to the motion of the nanoindentor. The results obtained indicate that there is a change in the nanostructure of the C – S – H gel, which is compared with an increase in strength, Young’s moduli and shear, upon the introduction of SiO2 nanoparticles and MCNT nanoparticles.

show abstract

Section: Methodsmentioning

confidence: 99%

Nanoindentation of cement stone samples

et al. 2020

View full text Add to dashboard Cite

show abstract

“…мости от типа углеродного материала, его физических и химических характеристик, геометрических параметров волокон и равномерности диспергирования в теле композита подтверждено в [1][2][3][4][5][6][7][8]. Присутствие углеродных нановолокон изменяет микроструктуру и наноструктуру бетона.…”

unclassified

“…Присутствие углеродных нановолокон изменяет микроструктуру и наноструктуру бетона. Зафиксировано уменьшение капиллярной и общей пористости с последующим улучшением структуры пор [3][4][5]. Результатом процессов, происходящих в капиллярах и трещинах, являются деформации в межзерновой матрице, свободному течению которых препятствуют жесткие зерна клинкера и углеродные нанотрубки, что создает в вершинах разделительных трещин некоторую интенсивность напряжения.…”

unclassified

Strength and crack resistance of cement composites under multilevel reinforcement

Zhdanok,

Leonovich,

Sadovskaya

et al. 2023

Dokl. Akad. nauk

View full text Add to dashboard Cite

The working hypothesis is confirmed that the required fracture toughness of structural concrete can be provided by multi-level reinforcement: at the level of the crystalline joint of cement stone – carbon nanotubes, and at the level of fine-grained concrete – various macro-sized fiber fibers (steel, polymer). Reinforcement of a crystalline splice with carbon nanotubes leads to an increase in tensile strength by 20 %, an increase in Young’s modulus. With dispersed reinforcement of concrete modified with nanoparticles at the level of fine-grained concrete, the tensile strength increases by 109 %, the critical stress intensity coefficient (crack resistance index) increases by 280 % at normal separation, and by 48 % at transverse shear.

show abstract

The compressive strength of steel fibre reinforced concrete obtained by testing cubes and cylinders

et al. 2021

View full text Add to dashboard Cite

There are two most popular approaches to determining the compressive strength of concrete: testing cubes, testing cylinders. The use of different samples gives different results, which are intended to characterize one parameter of the material compressive strength. The article discusses a general approach to determining the compressive strength of cylinders and cubes. The analysis of the factors influencing the transition coefficients when testing the cylinder samples with the ratio of height to diameter is less than 2. The results of testing cubes and cylinders for compression made of fiber-reinforced concrete are presented.

show abstract

Strength Enhancement of Concrete with a Plasticizer on the Basis of Nano-Structured Carbon

Cited by 6 publications

References 0 publications

Nanoindentation of cement stone samples

Nanoindentation of cement stone samples

Strength and crack resistance of cement composites under multilevel reinforcement

The compressive strength of steel fibre reinforced concrete obtained by testing cubes and cylinders

Contact Info

Product

Resources

About