The Experts below are selected from a list of 78 Experts worldwide ranked by ideXlab platform

Mirko Rinchi - One of the best experts on this subject based on the ideXlab platform.

  • wear resistance of blades in planetary Concrete Mixers part ii 3d validation of a new mixing blade design and efficiency evaluation
    Tribology International, 2016
    Co-Authors: Maria Cristina Valigi, Silvia Logozzo, Mirko Rinchi
    Abstract:

    Abstract This paper presents an improvement of a previous work, where the optimization of a two stars’ planetary Concrete mixer in terms of wear resistance of blades was proposed and a new design of the mixing blades’ shape was shown and discussed. Authors propose a new validation procedure of the mixing blades in terms of wear resistance and efficiency, based on 3D optical scanners. This new wear measuring procedure is classifiable as a digital wear evaluation method, included in the field of digital tribology. All the steps and results are presented and discussed. In addition, experimental tests and results about the efficiency of the new blade in terms of discharge times are shown. The results demonstrate that the proposed new blade's geometry improves the wear resistance, extends the useful-life and enhances the discharge operation.

  • wear resistance of blades in planetary Concrete Mixers design of a new improved blade shape and 2d validation
    Tribology International, 2016
    Co-Authors: Maria Cristina Valigi, Silvia Logozzo, Mirko Rinchi
    Abstract:

    Abstract Wear of machine components is one of the main phenomena to control and limit in order to improve the performance and reduce the production costs. In this paper, the optimization of a planetary Concrete mixer in terms of wear resistance of blades is proposed and a new design of the mixing blades’ shape is shown and discussed. Experimental tests performed with two stars planetary Concrete Mixers are described and achieved experimental results are shown. Those results display the progress of blades’ wear over time and prove that the proposed modified blade’s geometry improves the wear resistance and extends the useful-life.

Maria Cristina Valigi - One of the best experts on this subject based on the ideXlab platform.

  • wear resistance of blades in planetary Concrete Mixers part ii 3d validation of a new mixing blade design and efficiency evaluation
    Tribology International, 2016
    Co-Authors: Maria Cristina Valigi, Silvia Logozzo, Mirko Rinchi
    Abstract:

    Abstract This paper presents an improvement of a previous work, where the optimization of a two stars’ planetary Concrete mixer in terms of wear resistance of blades was proposed and a new design of the mixing blades’ shape was shown and discussed. Authors propose a new validation procedure of the mixing blades in terms of wear resistance and efficiency, based on 3D optical scanners. This new wear measuring procedure is classifiable as a digital wear evaluation method, included in the field of digital tribology. All the steps and results are presented and discussed. In addition, experimental tests and results about the efficiency of the new blade in terms of discharge times are shown. The results demonstrate that the proposed new blade's geometry improves the wear resistance, extends the useful-life and enhances the discharge operation.

  • wear resistance of blades in planetary Concrete Mixers design of a new improved blade shape and 2d validation
    Tribology International, 2016
    Co-Authors: Maria Cristina Valigi, Silvia Logozzo, Mirko Rinchi
    Abstract:

    Abstract Wear of machine components is one of the main phenomena to control and limit in order to improve the performance and reduce the production costs. In this paper, the optimization of a planetary Concrete mixer in terms of wear resistance of blades is proposed and a new design of the mixing blades’ shape is shown and discussed. Experimental tests performed with two stars planetary Concrete Mixers are described and achieved experimental results are shown. Those results display the progress of blades’ wear over time and prove that the proposed modified blade’s geometry improves the wear resistance and extends the useful-life.

  • Study of wear of planetary Concrete mixer blades using a 3d optical scanner
    Volume 15: Advances in Multidisciplinary Engineering, 2015
    Co-Authors: Maria Cristina Valigi, Silvia Logozzo, Ilaria Gasperini
    Abstract:

    Performance optimization of a Concrete mixer is fundamental in many industrial technologies. Wear is one of the main phenomena to be forecast and tested during the design and service of mechanical components. In all the Concrete Mixers types, blades suffer the wear more than other components.Two different blade shapes have been tested in order to evaluate the wear rates and which of them has the best performance in terms of wear resistance. One of the two shapes has been designed in order to minimize wear rates and to allow longer durability, on the basis of a theoretical approach.To guarantee the consistence of the comparison, the two different blades have been tested in a dedicated planetary Concrete mixer, with the same operating conditions (time-period, same mixture and mixer).The purpose of this paper is to show optical non-contact measurements of worn blades operating in a planetary Concrete mixer in order to evaluate wear rates and to validate the efficiency of the new blade design.Copyright © 2015 by ASME

  • planetary vertical Concrete Mixers simulation and predicting useful life in steady states and in perturbed conditions
    Simulation Modelling Practice and Theory, 2007
    Co-Authors: Maria Cristina Valigi, Ilaria Gasperini
    Abstract:

    Abstract A simulation environment for the dynamics of planetary Concrete Mixers has been developed, it is a model-based method using the lumped parameters analysis and integrating the theory of classical mechanics and life analysis. The aim of this work is to give a fast and easy to use tool capable of predicting the behaviour and the useful life of Concrete Mixers through geometrical and physical parameters. Simulations were conducted in steady states and in perturbed conditions. The gear reduction unit is the part of the mixer under most stress. Results were compared with data obtained from costumers on building sites.

Silvia Logozzo - One of the best experts on this subject based on the ideXlab platform.

  • wear resistance of blades in planetary Concrete Mixers part ii 3d validation of a new mixing blade design and efficiency evaluation
    Tribology International, 2016
    Co-Authors: Maria Cristina Valigi, Silvia Logozzo, Mirko Rinchi
    Abstract:

    Abstract This paper presents an improvement of a previous work, where the optimization of a two stars’ planetary Concrete mixer in terms of wear resistance of blades was proposed and a new design of the mixing blades’ shape was shown and discussed. Authors propose a new validation procedure of the mixing blades in terms of wear resistance and efficiency, based on 3D optical scanners. This new wear measuring procedure is classifiable as a digital wear evaluation method, included in the field of digital tribology. All the steps and results are presented and discussed. In addition, experimental tests and results about the efficiency of the new blade in terms of discharge times are shown. The results demonstrate that the proposed new blade's geometry improves the wear resistance, extends the useful-life and enhances the discharge operation.

  • wear resistance of blades in planetary Concrete Mixers design of a new improved blade shape and 2d validation
    Tribology International, 2016
    Co-Authors: Maria Cristina Valigi, Silvia Logozzo, Mirko Rinchi
    Abstract:

    Abstract Wear of machine components is one of the main phenomena to control and limit in order to improve the performance and reduce the production costs. In this paper, the optimization of a planetary Concrete mixer in terms of wear resistance of blades is proposed and a new design of the mixing blades’ shape is shown and discussed. Experimental tests performed with two stars planetary Concrete Mixers are described and achieved experimental results are shown. Those results display the progress of blades’ wear over time and prove that the proposed modified blade’s geometry improves the wear resistance and extends the useful-life.

  • Study of wear of planetary Concrete mixer blades using a 3d optical scanner
    Volume 15: Advances in Multidisciplinary Engineering, 2015
    Co-Authors: Maria Cristina Valigi, Silvia Logozzo, Ilaria Gasperini
    Abstract:

    Performance optimization of a Concrete mixer is fundamental in many industrial technologies. Wear is one of the main phenomena to be forecast and tested during the design and service of mechanical components. In all the Concrete Mixers types, blades suffer the wear more than other components.Two different blade shapes have been tested in order to evaluate the wear rates and which of them has the best performance in terms of wear resistance. One of the two shapes has been designed in order to minimize wear rates and to allow longer durability, on the basis of a theoretical approach.To guarantee the consistence of the comparison, the two different blades have been tested in a dedicated planetary Concrete mixer, with the same operating conditions (time-period, same mixture and mixer).The purpose of this paper is to show optical non-contact measurements of worn blades operating in a planetary Concrete mixer in order to evaluate wear rates and to validate the efficiency of the new blade design.Copyright © 2015 by ASME

Ilaria Gasperini - One of the best experts on this subject based on the ideXlab platform.

  • Study of wear of planetary Concrete mixer blades using a 3d optical scanner
    Volume 15: Advances in Multidisciplinary Engineering, 2015
    Co-Authors: Maria Cristina Valigi, Silvia Logozzo, Ilaria Gasperini
    Abstract:

    Performance optimization of a Concrete mixer is fundamental in many industrial technologies. Wear is one of the main phenomena to be forecast and tested during the design and service of mechanical components. In all the Concrete Mixers types, blades suffer the wear more than other components.Two different blade shapes have been tested in order to evaluate the wear rates and which of them has the best performance in terms of wear resistance. One of the two shapes has been designed in order to minimize wear rates and to allow longer durability, on the basis of a theoretical approach.To guarantee the consistence of the comparison, the two different blades have been tested in a dedicated planetary Concrete mixer, with the same operating conditions (time-period, same mixture and mixer).The purpose of this paper is to show optical non-contact measurements of worn blades operating in a planetary Concrete mixer in order to evaluate wear rates and to validate the efficiency of the new blade design.Copyright © 2015 by ASME

  • planetary vertical Concrete Mixers simulation and predicting useful life in steady states and in perturbed conditions
    Simulation Modelling Practice and Theory, 2007
    Co-Authors: Maria Cristina Valigi, Ilaria Gasperini
    Abstract:

    Abstract A simulation environment for the dynamics of planetary Concrete Mixers has been developed, it is a model-based method using the lumped parameters analysis and integrating the theory of classical mechanics and life analysis. The aim of this work is to give a fast and easy to use tool capable of predicting the behaviour and the useful life of Concrete Mixers through geometrical and physical parameters. Simulations were conducted in steady states and in perturbed conditions. The gear reduction unit is the part of the mixer under most stress. Results were compared with data obtained from costumers on building sites.

Nicolas Roquet - One of the best experts on this subject based on the ideXlab platform.

  • Recycled Concrete aggregate attrition during mixing new Concrete
    Construction and Building Materials, 2016
    Co-Authors: Jaime Moreno Juez, Bogdan Cazacliu, Alexis Cothenet, Riccardo Artoni, Nicolas Roquet
    Abstract:

    In this work, the recycled Concrete aggregate (RCA) friability during mixing was studied in order to better understand the evolution of this material during the mixing process and improve the recycled aggregate Concrete mix-design. The influence of some important materials and process parameters was evaluated: initial abrasion resistance and initial moisture of the aggregates, mixer geometry, mixing time and mixing speed. To assess the mixing process effect on the recycled Concrete aggregate friability, three different aspects were evaluated; the mass loss (mass of fraction inferior to 2.5 mm) the grading and the angularity evolutions with mixing time of an initially 10-14 mm aggregate. Tests were carried out in two types of laboratory Concrete Mixers, a planetary 30 l mixer from Skako and an intensive 5 l Erich mixer. The results revealed that in normal laboratory setting of the Mixers configuration, the mass loss for natural aggregate (NA) is less than 1% of the coarse aggregate. This percentage reach 3% for good quality recycled Concrete aggregate (MDE value of 21) and 5% for lower quality recycled Concrete aggregate (MDE value of 27). The mass loss directly depends on the mixing parameters and the degradation of the recycled Concrete aggregate drastically increased when the mixing speed was raised to 500 RPM. By analyzing the grading evolution during mixing, it was shown that both cleavage (creation of intermediate size particles) and attrition (creation of small particles) mechanisms influenced the aggregate degradation. However, the configuration of mixing significantly influenced the proportion of attrition and cleavage mechanisms. To complete this work, the angularity evolution showed that recycled Concrete aggregate surface becomes smoother and the edges more rounded after mixing.