Construction of a stochastic model for a water supply network with hidden leaks and a method for detecting and calculating the leaks

Tevyashev, Andriy; Matviyenko, Olga; Nikitenko, Glib

doi:10.15587/1729-4061.2019.186157

Cited by 6 publications

(5 citation statements)

References 12 publications

(22 reference statements)

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“…Another type of concrete of the new generation is obtained with the use of nano additives of various types. For example, in work [8] powders of metal oxides and silicon were used as nano modifiers of concrete in the conducted research, but the results of studies into the homogeneity of the obtained concretes are not shown. The same applies to work [9], in which the results of research on concrete containing micro silica and crushed chalk are given.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Ensuring uniformity of strength of fine-grained concrete based on modified composite cement

Shіshkina,

Domnichev

2024

EEJET

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Insufficient determination of the effect of surface-active substances introduced in extremely low concentrations on the formation of the stability of the properties of fine-grained concrete based on composite Portland cements determined the feasibility of conducting research in this area. The studies investigated the influence of the modification of composite cement with water activated by the use of the hydrophilic hydration mechanism. It has been proven that these factors include the type and amount of applied water nano modifiers. The analysis of the study results confirmed that the introduction of water activated by the mechanism of hydrophilic hydration into concrete in extremely small doses significantly increases the rate of formation of concrete strength and reduces the coefficient of its variation. Owing to this, the strength of the resulting modified fine-grained concrete based on composite cement at the age of 3 days exceeds the strength of the similar concrete without additives by 300 %, and at the age of 27 days – by 25 %. At the same time, the coefficient of variation of strength has a minimum value at the optimal amount of nano additive – water modifier. This allows us to assert the effectiveness of the revealed mechanism of modification of composite cement. Thus, there are reasons to assert the possibility of targeted regulation of the processes of formation of a strong homogeneous structure of fine-grained concrete based on composite cement by using water activated by the mechanism of hydrophilic hydration

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Ensuring uniformity of strength of fine-grained concrete based on modified composite cement

Shіshkina,

Domnichev

2024

EEJET

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“…Another type of concrete of the new generation is obtained with the use of nano additives of various types. For example, in work [5], "nanodiamonds" and powders of oxides of metals Ti, Al, Ca, Mg, silicon and metals W, Co were used as nanomodifiers of concrete in the research. But the research was conducted on Portland cement.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Formation of the strength of fine-grained concrete based on modified slag Portland cement

Shіshkina,

Piskun

2023

EEJET

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The object of research is fine-grained concrete on slag portland cement. Owing to the significant content of metallurgical industry waste in its composition, slag portland cement belongs to ecologically acceptable products. However, the insufficient rate of formation of its structure and, as a result, the main quality indicator, which is compressive strength, limits the field of use of slag portland cement. Therefore, in the studies, the goal was to increase the speed of formation of the strength of fine-grained concrete made on slag portland cement. The studies of the influence of modification of slag portland cement with water, activated by the use of the hydrophobic hydration mechanism, established the factors affecting the speed of formation and the value of compressive strength of fine-grained concrete made on slag portland cement. It has been proven that these factors include the type and amount of applied water nanomodifiers, as well as the type and amount of fine concrete aggregate. The analysis of the study results confirmed that the introduction of water activated by the mechanism of hydrophobic hydration into concrete in ultra-small doses significantly increases the rate of formation of concrete strength. Given this, the strength of the resulting modified fine-grained concrete based on slag portland cement at the age of 2 days exceeds the strength of the similar concrete without additives by 60 %, and at the age of 210 days – by 25 %. This allows us to assert the effectiveness of the identified mechanism of modification of slag portland cement. Thus, there are reasons to assert the possibility of targeted regulation of the processes of forming a strong structure of fine-grained concrete based on slag portland cement by using water activated by the mechanism of hydrophobic hydration

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“…The works of researchers from Kharkiv, Ukraine are known: Dyadun S.V.-about water supple [15] and control to aggregates of pumping stations [16,17]; Tevyashev A.N. et all about stochastic model for a water supply network [18,19], Information and Measurement System [20][21][22].…”

Section: Theory and Practices Of Engineering Pipeline Systemsmentioning

confidence: 99%

GIS-technology of Water Drainage System (WDS) Modernization in Ukrainian City with Rugged Terrain

2022

IJATCSE

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GIS-technology of water-drainage-system modernization in Ukrainian city with rugged terrain, has been developed. The directions of modernization municipal sanitary sewer system for carrying waste are proposed. These are: the decentralization of the drainage system (1), the use of local treatment facilities (2) and of higher aquatic vegetation for additional treatment (3). The transition from a pressure network to a non-pressure network is proposed to be carried out by replacing the sewage pumping station (SPS) with a local treatment plant. If necessary to increase the self-cleaning capacity of small rivers that receive domestic wastewater and storm drains with surface runoff, cascades of simple dams from bio fouling materials can be created on them. The 3D mathematico-cartographical model of the city houscommunal services has been developed, which allows making decisions based on geostatistical analysis. The suitability of model is checked by the RR criterion.

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Construction of a stochastic model for a water supply network with hidden leaks and a method for detecting and calculating the leaks

Cited by 6 publications

References 12 publications

Ensuring uniformity of strength of fine-grained concrete based on modified composite cement

Ensuring uniformity of strength of fine-grained concrete based on modified composite cement

Formation of the strength of fine-grained concrete based on modified slag Portland cement

GIS-technology of Water Drainage System (WDS) Modernization in Ukrainian City with Rugged Terrain

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