Increasing the plasticity of concrete mixes in hydrotechnical construction

Barabanshchikov, Yuri; Semenov, Kirill

doi:10.1007/s10749-007-0038-8

Cited by 12 publications

(14 citation statements)

References 1 publication

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“…In production, there is no need to construct a complete rheological curve each time, so that to check the parameters quickly it is sufficient to measure its properties for come fixed conditions. Both capillary and rotational viscosimeters with a simplified construction [1,13,18], with which the rheological characteristics are obtained in arbitrary units, are used for such purposes. V. Yu.…”

Section: Methods Of Measuring the Rheological Propertiesmentioning

confidence: 99%

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Methods of measuring the rheological properties of compounds for extrusion

Prokof’ev

2010

Glass Ceram

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A classification is given for methods of measuring the rheological properties of ceramic compounds for extrusion. Depending on the magnitude of the shear stresses under which the testing is performed, it is proposed that the methods of investigation be divided into structural-mechanical and rheological. The most informative methods as well as the structural-mechanical and rheological parameters obtained with these measurements are described. Recommendations are given for using each method for scientific investigations and for checking the parameters of the molding compounds in the production of extruded ceramic articles.

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Section: Methods Of Measuring the Rheological Propertiesmentioning

confidence: 99%

“…other methods (pendulum, vibration, flow spreading, viscosimeters with sinking or up-floating all, and so forth) [7,11,18].…”

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confidence: 99%

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Methods of measuring the rheological properties of compounds for extrusion

Prokof’ev

2010

Glass Ceram

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“…A change in the thermal state of such structures occurs due to the heat liberation from cement hydration during the concrete hardening process, as well as outside temperature fluctuations, solar exposure, various technological factors, etc. Emerging thermal stresses may cause damage to the structural integrity [15][16][17][18][19][20][21][22][23][24][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, the irregular temperature distribution arises along with the block height, which leads to the dangerous tensile strain first on the surface of the foundation slab and then in its central zones. In this regard, the winter period is especially unfavorable for construction [30].…”

Section: Introductionmentioning

confidence: 99%

Thermal Stressed State in Massive Concrete Structures in the Winter Building Period

Korotchenko

Ivanov

Semenov

et al. 2016

MATEC Web of Conferences

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Abstract. The article deals with issues of the thermal cracking resistance in massive concrete and reinforced concrete structures during the building period. The paper gives the calculation results of thermal stressed state in massive foundation slabs with different time organization of the thermal protection. It was found that the thermal crack resistance is fully guaranteed when the insulation is installed immediately after concrete has been placed or it has been placed with short delay. The delay can be allowed if the relative tensile strain of the concrete does not exceed the tensility limit. The acceptable delay ranges from 8 to 30% of time it takes to reach the maximum temperature in the concrete block. The surface insulation installation at the time of the temperature peak inevitably leads to the formation and development of cracks.

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In-site transportation of concrete mix: new typology of methods, potential and fields of modern mechanization means’ rational application

Osmanov

2021

E3S Web Conf.

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The main structural material in construction industry is concrete. The article discusses the features of modern methods and means of in-site transportation of the mixture that subsequently forms it and, in particular, its supply to the concreting blocks of monolithic structures. The requirements of Russian norms for this process implementation, as well as the world practice of using the machines, equipment and devices intended for this, are analyzed. A new typology of methods for in-site transportation of concrete mixture is proposed, based on the differences between them in the type and resource intensity of the main moving action. Generalized, systematized and brought to the applied form information about the productivity and parameters of the mechanization corresponding means working zones, as well as the mixture technological properties influence on the possibility of their use. The data obtained made it possible to clarify the rational use areas of the main types of such technology and to reveal the contradictions associated with this. In general, the research results presented in the article facilitate the identification of shortcomings and promising directions for improving the considered competing methods and technical means, as well as justification of the choice between them.

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Increasing the plasticity of concrete mixes in hydrotechnical construction

Cited by 12 publications

References 1 publication

Methods of measuring the rheological properties of compounds for extrusion

Methods of measuring the rheological properties of compounds for extrusion

Thermal Stressed State in Massive Concrete Structures in the Winter Building Period

In-site transportation of concrete mix: new typology of methods, potential and fields of modern mechanization means’ rational application

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