Effect of Strain Rate and Fiber Type on Tensile Behavior of High-Strength Strain-Hardening Cement-Based Composites (HS-SHCC)

Heravi, Ali A.; Smirnova, Olga; Mechtcherine, Viktor

doi:10.1007/978-94-024-1194-2_31

Cited by 19 publications

(6 citation statements)

References 7 publications

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“…Hence, strain-hardening cement-based composites are favourable for applications in dynamic loading regimes. In particular, the material response under high strain rates, e.g., under impact loads caused by collisions or explosions, is a prominent topic of recent research [ 4 , 6 , 7 , 8 , 9 ]. Furthermore, seismic activities represent a serious risk for structures in earthquake-prone areas since the high amplitude vibrations damage structures permanently.…”

Section: Introductionmentioning

confidence: 99%

Increasing the Fatigue Resistance of Strain-Hardening Cement-Based Composites (SHCC) by Experimental-Virtual Multi-Scale Material Design

et al. 2021

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Strain-hardening cement-based composites are a promising class of materials for a wide variety of applications due to their considerable tensile strength and pronounced ductility caused by the development of multiple fine cracks. Nevertheless, the safe use of such composites requires sound knowledge of their mechanical behaviour under different types of loading, particularly under fatigue loading, while considering distinct influences like initial crack width and fibre orientation. To deepen this knowledge, single-fibre pull-out tests on PVA-fibres from a cementitious matrix were carried out to gain information about the micro-mechanical and degradation processes of the fibre. It could be shown that the fibres tend to rupture instead of being pulled out under quasi-static loading. When changing the loading regime to alternating loading, this failure mechanism shifts to pull-out. By varying the experimental parameters such as initial crack width, inclination angle or compressive-force level a clear influence on the fibre’s crack bridging capacity could be observed associated with effects on the degradation processes. Based on the data obtained, a micro-mechanical numerical model was developed to support the assumptions and observations from single-fibre pull-out tests and to enable predictions of the performance of the material on the microscale under cyclic loading.

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Section: Introductionmentioning

confidence: 99%

Increasing the Fatigue Resistance of Strain-Hardening Cement-Based Composites (SHCC) by Experimental-Virtual Multi-Scale Material Design

et al. 2021

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“…Ground quartz sand is used to produce high-performance concrete [2,30,31]. The presence of ground quartz sand makes it possible to obtain workable mixtures at low water dmand with a uniform distribution of micro-or microfibers [32][33][34]. Ground quartz sand with grain composition of 0.01-0.1 mm is used in the compositions of modern types of high-strength strain-hardening cement-based composites, the feature of which is very low water demand and high amount of micro-fibers [33,34].…”

Section: Introductionmentioning

confidence: 99%

“…The presence of ground quartz sand makes it possible to obtain workable mixtures at low water dmand with a uniform distribution of micro-or microfibers [32][33][34]. Ground quartz sand with grain composition of 0.01-0.1 mm is used in the compositions of modern types of high-strength strain-hardening cement-based composites, the feature of which is very low water demand and high amount of micro-fibers [33,34]. Increasing the early strength of concrete with fine-grained quartz sand of dispersion of 1-4 µm in the amount of 5-10% of Portland cement mass is stated in papers [29,35].…”

Section: Introductionmentioning

confidence: 99%

Technological Properties of Self-Compacting Concrete Mixtures with Ground Quartz Sand

Kazanskaya¹,

Fadeeva²,

Isakovsky³

2019

IJITEE

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Quantitative parameters of influence of grain composition of ground quartz sand and its quantity on the workability and segregation of self-compacting fresh concrete were determined at the constant amount of mixing water and water-cement ratio. Ground quartz sand in the amount of 50-150 kg/m3 was added instead of fine and coarse aggregates with changing the amount of polycarboxylate superplasticizer. It is stated that the use of ground quartz sand of finer grinding provides higher values of workability at the same quantity of water and superplasticizer. Segregation of the fresh concrete occurs when using increased amount of ground quartz sand of coarser grinding and increased amount of superplasticizer. Experimental studies have shown the effectiveness of the use of ground quartz sand to obtain self-compacting fresh concrete of different classes of workability SF1 and SF2 as well as classes of segregation resistance SR1 and SR2. The results of the experiments allow to state that the use of ground quartz sand of coarser grinding leads to segregation of fresh concrete at its low workability, while the use of ground quartz sand of finer grinding allows to obtain fresh concrete with resistance to segregation.

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“…All this results in the appearance of emergency conditions (Belentsov et al, 2017;Kharitonov et al, 2019;Formisano and Marzo, 2017;Giordano et al, 2018), which can be corrected by replacing all the masonry elements, strengthening the masonry surface or restoring the stone (Forster et al, 2011;Pauletta et al, 2018;Ribilotta et al, 2019). The initial properties of the masonry material and the degree of its deterioration mean that there are a lot of possible combinations with regard to the technological methods and materials required for its restoration (Heravi et al, 2018;Myasnikova and Pervunina, 2019;Šoukal et al, 2016;Kalina et al, 2018;Gailitis et al, 2019). The type of intervention required for a monument therefore depends on its actual state, as well as on the exact type of material in question.…”

Section: Introductionmentioning

confidence: 99%

Optimization of repair mortar used in masonry restoration

Kharitonov

Smirnova

2019

Spatium

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Deterioration of ancient masonry is a contemporary problem. The initial properties of the masonry material that determine its durability, deterioration and degree of preservation have led to the appearance of different approaches towards choosing the technology for restoring masonry. The success of any restoration is largely determined by its compatibility with the original materials used, which requires, as a rule, a complex and long process of selecting their composition. One of the main technological approaches in the science of restoration materials is to search for the optimal composition of the material within a given time limit. This paper presents an approach which uses a large number of variables within strict boundary conditions. The solution to this problem can be found in the field of mathematical modelling using experiment planning methods. The paper presents a method developed for mortar optimization which makes it possible to obtain the desired result within a relatively short period of time.

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Effect of Strain Rate and Fiber Type on Tensile Behavior of High-Strength Strain-Hardening Cement-Based Composites (HS-SHCC)

Cited by 19 publications

References 7 publications

Increasing the Fatigue Resistance of Strain-Hardening Cement-Based Composites (SHCC) by Experimental-Virtual Multi-Scale Material Design

Increasing the Fatigue Resistance of Strain-Hardening Cement-Based Composites (SHCC) by Experimental-Virtual Multi-Scale Material Design

Technological Properties of Self-Compacting Concrete Mixtures with Ground Quartz Sand

Optimization of repair mortar used in masonry restoration

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