Study on concrete pumpability combining different laboratory

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  • Assessment and prediction of concrete flow and pumping ...

    Mar 01 2020 · Concrete flow in a pipeline is a complex material response to the induced pressure accompanied by shear in LL [] friction between solid particles and pipe wall [101819] and significant hydrodynamic interactions among particles within the partially sheared concrete bulk [2021]; cf. Fig. 2.The extent to which frictional resistance is active depends on the state of saturation of the concrete ...

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  • Evaluation of Material Modification using PET in 3D ...

    Jan 01 2021 · Secrieru E Fataei S Schröfl C and Mechtcherine V 2017 Study on concrete pumpability combining different laboratory tools and linkage to rheology Construction and Building Materials 144 451-61. Google Scholar

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  • Egor SECRIERU | Deputy Team Leader Laboratories | Dr.-Ing ...

    Egor Secrieru currently works at HeidelbergCement AG Department of Engineering and Innovation as deputy team leader of laboratories with the focus on sustainable concrete solutions.

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  • Christof SCHROEFL | Technische Universität Dresden ...

    The paper at hand focuses on various methods to characterize the pumpability of fresh concrete. Primarily the rheological behaviours of the concrete as a bulk are described.

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  • Study on concrete pumpability combining different ...

    The paper at hand focuses on various methods to characterize the pumpability of fresh concrete. Primarily the rheological behaviours of the concrete as a bulk are described. The study concentrates on the composition and rheological properties of the lubrication layer forming at the interface to the pipeline wall since this layer is widely considered crucial for concrete pumpability.

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  • Changes in concrete properties during pumping and ...

    Jun 01 2018 · The pumpability of fresh concrete depends on the rheological properties of concrete bulk and forming LL [171822]. In practice it is best described as the relationship between pumping pressure and flow rate in a PQ curve with A as y-intercept and B as curve slope; see Fig. 8 and Table 4 .

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  • Shirin Fataei Technische Universität Dresden Karlsruhe ...

    Study on concrete pumpability combining different laboratory tools and linkage to rheology Construction and Building Materials März 2017 The paper at hand focuses on various methods to characterize the pumpability of fresh concrete.

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  • Metrology Needs for Predicting Concrete Pumpability

    Jun 22 2015 · With the increasing use of pumping to place concrete the development and refinement of the industry practice to ensure successful concrete pumping are becoming important needs for the concrete construction industry. To date research on concrete pumping has been largely limited to a few theses and research papers. The major obstacle to conduct research on concrete pumping is that it

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  • Formation of lubricating layer and flow type during ...

    Jul 30 2018 · Formation of lubricating layer is a prerequisite of concrete pumpability. Lubricating layer thickness amounts to a few millimetres. Concrete exhibits either plug flow or shear flow or a combination of both. Flow type is defined at low flow rates. Pumping pressure estimated using rheological tools is verified on laboratory scale.

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  • Impact of the pumping process on the properties of ...

    The distinctive characteristic of lightweight concrete lies in its combination of load-bearing and insulating properties. In order to produce this material using modern manufacturing processes such as spraying or printing certain hurdles must be overcome. For example a multi-component concrete has to be developed that is not only optimized concerning its rheological properties but also ...

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  • Testing pumpability of concrete using Sliding Pipe ...

    Using this device a series of laboratory tests to investigate the pumpability of concretes with various compositions was performed. The results obtained provide a solid basis to demonstrate the links between mixture parameters e.g. water-to-binder ratio aggregate shape admixtures and consistency class and the pumpability of concrete.

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  • Automation in the Construction of a 3D-Printed Concrete ...

    Developments in the automation of construction processes observable in recent years is focused on speeding up the construction of buildings and structures. Additive manufacturing using concrete mixes are among the most promising technologies in this respect. 3D concrete printing allows the building up of structure by extruding a mix layer by layer.

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  • Construction and Building Materials | Vol 144 Pages 1-758 ...

    Study on concrete pumpability combining different laboratory tools and linkage to rheology Egor Secrieru Shirin Fataei Christof Schröfl Viktor Mechtcherine Pages 451-461

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  • Influence of Aggregate Volume Fraction on Concrete Pumping ...

    Aug 25 2019 · Abstract. The paper at hand quantifies the influence of aggregate volume fraction on pumping behaviour of concretes with distinct flow behaviours i.e. plug or shear flow type. For this purpose conventionally vibrated concretes (CVC) and self-compacting concretes (SCC) containing different volume fraction of aggregates are designed and their ...

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  • Assessment and prediction of concrete flow and pumping ...

    Mar 01 2020 · Concrete flow in a pipeline is a complex material response to the induced pressure accompanied by shear in LL [] friction between solid particles and pipe wall [101819] and significant hydrodynamic interactions among particles within the partially sheared concrete bulk [2021]; cf. Fig. 2.The extent to which frictional resistance is active depends on the state of saturation of the concrete ...

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  • On the Question of Mix Composition Selection for ...

    Study on concrete pumpability combining different laboratory tools and linkage to rheology. Construction and Building Materials. 144 (2017) 451-461. DOI: 10.1016/j.conbuildmat.2017.03.199

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  • Alternatives to Type II cement. Part I. Preliminary ...

    In this study concrete mixtures incorporating fly ash are being investigated as possible alternatives to mixtures using Type II cements. The mixture characteristics being considered are strength resistance to freezing and thawing and sulfates heat of hydration and volume stability. Control ...

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  • Study on concrete pumpability combining different ...

    Jul 30 2017 · The pumpability of concrete incorporates a series of aspects related to the rheological and tribological behaviour of fresh concrete first of all to its ability to build a lubricating layer. In the present paper different laboratory tools used to characterize and quantify concrete pumpability were compared and attempts to combine them were reported.

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  • Testing pumpability of concrete using Sliding Pipe ...

    Testing pumpability of concrete using Sliding Pipe Rheometer. Abstract The pumping of concrete is an important part of modern construction processes. Irrespective of the immense practical significance of this process pumping pressure is still being estimated using conventional methods such as the slump test which has proved inadequate.

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