The Experts below are selected from a list of 1269 Experts worldwide ranked by ideXlab platform

Apostolos Baklavaridis - One of the best experts on this subject based on the ideXlab platform.

  • fired ceramics 100 from lignite fly ash and waste Glass Cullet mixtures
    Journal of building engineering, 2017
    Co-Authors: Vayos Karayannis, E. Katsika, C. Drossou, A. Domopoulou, A Moutsatsou, Apostolos Baklavaridis
    Abstract:

    Abstract In the present study, the development of new building ceramics is investigated, using 100% lignite fly ash (FA) and waste Glass Cullet (WGC) mixtures as secondary industrial raw materials towards circular economy. Thus, compacted and sintered (at 700 and 900 °C) ceramic bodies based on binary WGC/FA mixtures, with WGC loadings up to 15%, were fabricated. The utilization of WGC (amorphous) aimed at lowering the sintering temperature of the mixture, for energy reduction purposes, via a better heat flux regulation in the material. The successful consolidation/densification of the ceramic microstructures, mainly composed of different silica phases, was achieved upon synergistic sintering at 900 °C for 2 h. Moreover, the successful consolidation/densification was confirmed by the SEM micrograph observation and the porosity evaluation from the SEM micrographs. The addition of WGC yielded to a drastic decrease in the porosity values (down to 12%) for the samples sintered at 900 °C for 2 h. This porosity decrease favored, in turn, the substantial microhardness increase (up to 3833 HV) due to the pore sealing by the Glassy phase of WGC. Moreover, an exponential relationship between microhardness and porosity was revealed. Finally, further investigation of the processing conditions is currently underway towards the optimization of the attained ceramic microstructures in order to meet the requirements of specific applications.

  • Fired ceramics 100% from lignite fly ash and waste Glass Cullet mixtures
    Journal of Building Engineering, 2017
    Co-Authors: Vayos Karayannis, E. Katsika, C. Drossou, A. Domopoulou, A Moutsatsou, Apostolos Baklavaridis
    Abstract:

    In the present study, the development of new building ceramics is investigated, using 100% lignite fly ash (FA) and waste Glass Cullet (WGC) mixtures as secondary industrial raw materials towards circular economy. Thus, compacted and sintered (at 700 and 900 °C) ceramic bodies based on binary WGC/FA mixtures, with WGC loadings up to 15%, were fabricated. The utilization of WGC (amorphous) aimed at lowering the sintering temperature of the mixture, for energy reduction purposes, via a better heat flux regulation in the material. The successful consolidation/densification of the ceramic microstructures, mainly composed of different silica phases, was achieved upon synergistic sintering at 900 °C for 2 h. Moreover, the successful consolidation/densification was confirmed by the SEM micrograph observation and the porosity evaluation from the SEM micrographs. The addition of WGC yielded to a drastic decrease in the porosity values (down to 12%) for the samples sintered at 900 °C for 2 h. This porosity decrease favored, in turn, the substantial microhardness increase (up to 3833 HV) due to the pore sealing by the Glassy phase of WGC. Moreover, an exponential relationship between microhardness and porosity was revealed. Finally, further investigation of the processing conditions is currently underway towards the optimization of the attained ceramic microstructures in order to meet the requirements of specific applications.

A Moutsatsou - One of the best experts on this subject based on the ideXlab platform.

  • fired ceramics 100 from lignite fly ash and waste Glass Cullet mixtures
    Journal of building engineering, 2017
    Co-Authors: Vayos Karayannis, E. Katsika, C. Drossou, A. Domopoulou, A Moutsatsou, Apostolos Baklavaridis
    Abstract:

    Abstract In the present study, the development of new building ceramics is investigated, using 100% lignite fly ash (FA) and waste Glass Cullet (WGC) mixtures as secondary industrial raw materials towards circular economy. Thus, compacted and sintered (at 700 and 900 °C) ceramic bodies based on binary WGC/FA mixtures, with WGC loadings up to 15%, were fabricated. The utilization of WGC (amorphous) aimed at lowering the sintering temperature of the mixture, for energy reduction purposes, via a better heat flux regulation in the material. The successful consolidation/densification of the ceramic microstructures, mainly composed of different silica phases, was achieved upon synergistic sintering at 900 °C for 2 h. Moreover, the successful consolidation/densification was confirmed by the SEM micrograph observation and the porosity evaluation from the SEM micrographs. The addition of WGC yielded to a drastic decrease in the porosity values (down to 12%) for the samples sintered at 900 °C for 2 h. This porosity decrease favored, in turn, the substantial microhardness increase (up to 3833 HV) due to the pore sealing by the Glassy phase of WGC. Moreover, an exponential relationship between microhardness and porosity was revealed. Finally, further investigation of the processing conditions is currently underway towards the optimization of the attained ceramic microstructures in order to meet the requirements of specific applications.

  • Fired ceramics 100% from lignite fly ash and waste Glass Cullet mixtures
    Journal of Building Engineering, 2017
    Co-Authors: Vayos Karayannis, E. Katsika, C. Drossou, A. Domopoulou, A Moutsatsou, Apostolos Baklavaridis
    Abstract:

    In the present study, the development of new building ceramics is investigated, using 100% lignite fly ash (FA) and waste Glass Cullet (WGC) mixtures as secondary industrial raw materials towards circular economy. Thus, compacted and sintered (at 700 and 900 °C) ceramic bodies based on binary WGC/FA mixtures, with WGC loadings up to 15%, were fabricated. The utilization of WGC (amorphous) aimed at lowering the sintering temperature of the mixture, for energy reduction purposes, via a better heat flux regulation in the material. The successful consolidation/densification of the ceramic microstructures, mainly composed of different silica phases, was achieved upon synergistic sintering at 900 °C for 2 h. Moreover, the successful consolidation/densification was confirmed by the SEM micrograph observation and the porosity evaluation from the SEM micrographs. The addition of WGC yielded to a drastic decrease in the porosity values (down to 12%) for the samples sintered at 900 °C for 2 h. This porosity decrease favored, in turn, the substantial microhardness increase (up to 3833 HV) due to the pore sealing by the Glassy phase of WGC. Moreover, an exponential relationship between microhardness and porosity was revealed. Finally, further investigation of the processing conditions is currently underway towards the optimization of the attained ceramic microstructures in order to meet the requirements of specific applications.

  • Utilization Of Ground Coloured Glass CulletIn Construction Materials
    WIT transactions on engineering sciences, 2007
    Co-Authors: A. Karamberi, A Moutsatsou
    Abstract:

    Due to the imperative need for recycling, the present study was focused on the exploitation of domestic and industrial waste and particularly of finely ground Glass Cullet in three applications of structural materials. Firstly, the possible use of Glass Cullet in cementitious materials either as a binder, aggregate or filler was studied. A second study sector was the utilization of Glass Cullet for the production of foam Glass. The particle size effect of Glass Cullet and the influence of the type and content of foaming agent at the final product were examined. And finally, the vitrification by thermal treatment of industrial waste (fly ashes and slag) with or without the presence of Glass Cullet and the further crystallization of the Glassy products for the production of Glass-ceramics was studied.

  • Synthesis of Glass-ceramics using Glass Cullet and vitrified industrial by-products
    Journal of the European Ceramic Society, 2007
    Co-Authors: A. Karamberi, K. Orkopoulos, A Moutsatsou
    Abstract:

    This study concerns the recycling of inorganic waste materials for the production of Glass-ceramics and the evaluation of the developed physical properties. Four industrial by-products were selected due to their mass production: (i) two high calcium lignite fly ashes, (ii) slag derived from the production of Fe-Ni and, (iii) steel slag. In order to examine the role of the SiO2 in the crystallization process, Glass Cullet and Egyptian sand were added. Thermal treatment, at 1450 degrees C, enables the production of Glasses using mixtures of these materials at appropriate proportions. The crystallization was achieved by heating at 900, 950 and 1000 degrees C. The produced materials were examined concerning their structure by X-ray diffraction and scanning electron microscopy (SEM-EDS). The results showed that the crystalline phase is greatly depending on the structure of the raw material and the thermal process, influencing accordingly the hardness of the final products. (c) 2006 Elsevier Ltd. All rights reserved

  • INFLUENCE OF Glass Cullet IN CEMENT PASTES
    China Particuology, 2006
    Co-Authors: A. Karamberi, E. Chaniotakis, D. Papageorgiou, A Moutsatsou
    Abstract:

    The present study investigates Glass and cement compatibility with a view to use Glass as a cement replacement. Amber, flint and green Glasses were chosen due to their prevalence in the Greek market as packaging materials. The factors under investigation were the pozzolanicity of the Glass Cullet, the hydration rate and the mechanical strength development of the cement pastes, as well as the expansion of the specimens due to alkali-silica reaction. Moreover, the potential enhancement of Glass pozzolanic activity was examined. The results of the study were encouraging to show the potentiality of utilising Glass Cullet in cementitious products.

Stefano Maschio - One of the best experts on this subject based on the ideXlab platform.

  • Glazed tiles produced using paper sludge, Glass Cullet and a natural red clay: an experimental study
    International Journal of Environmental Studies, 2018
    Co-Authors: Erika Furlani, Stefano Maschio
    Abstract:

    AbstractThe paper describes the production, in single fast firing, of tiles containing 30 wt% of a natural red clay and a mixture of 42 wt% of paper mill sludge and 28 wt% of Glass Cullet which were coated with a commercial ‘matt white’ glaze. Fired materials have been characterized as a function of the top temperature (1090 or 1140 °C) reached at the top of the fast sintering process made by an industrial roller kiln. It has been observed that tiles fired at 1090 °C display the best overall performances because the matt glaze well covers the substrate, thus ensuring that the mechanical and physical properties of the tiles conform to the official standard.

  • Recycling Glass Cullet from Waste CRTs for the Production of High Strength Mortars
    2013
    Co-Authors: Stefano Maschio, Gabriele Tonello, Erika Furlani
    Abstract:

    The present paper reports on the results of some experiments dealing with the recycling of mixed cathode ray tube (CRT) Glass waste in the production of high-strength mortars. Waste CRT Glass Cullet was previously milled, and sieved, and the only fine fraction was added to the fresh mortar in order to replace part of the natural aggregate. The addition of superplasticizer was also investigated. All hydrated materials displayed high compressive strength after curing. Samples containing CRT mixed Glass showed a more rapid increase of strength with respect to the reference compositions, and materials with a superplasticizer content of 1% showed the best overall performance due to the favourable influence of the small Glass particles which increase the amount of silicate hydrated produced. The induced coupled plasma (ICP) analysis made on the solutions, obtained from the leaching tests, confirmed the low elution of hazardous elements from the monolithic materials produced and consequently their possible environmental compatibility.

  • Sintering and characterisation of ceramics containing paper sludge, Glass Cullet and different types of clayey materials
    Ceramics International, 2011
    Co-Authors: Erika Furlani, Stefano Maschio, Gabriele Tonello, Eleonora Aneggi, Dino Minichelli, Sergio Brückner, E. Lucchini
    Abstract:

    Abstract The present paper reports on the sintering behaviour of several ceramics prepared using a previously selected mixture of incinerated paper mill sludge and Glass Cullet in the ratio 60/40 which was blended with 10, 20, 30 and 40 wt.% of three different natural materials. The three natural products were: a red quartzitic clay, a yellow quartzitic clay and a kaolin. All mixtures were blended by attrition milling and dried; powders were sieved, pressed into specimens and fired for 1 h at temperatures ranging from 1040 to 1140 °C. The resulting materials were characterized by water absorption, shrinkage, crystallographic composition, microstructure and physico-mechanical properties. It was observed that materials containing kaolin display the best overall behaviour independently of the quantity of kaolin introduced. Conversely the optimal sintering temperature, and consequently the best properties of the materials prepared using red or yellow clay were measured on products fired at temperatures above 1080 °C; materials and temperatures are affected by the amount of clay added.

  • Fast Firing of Glazed Tiles Containing Paper Mill Sludge and Glass Cullet
    Advances in Science and Technology, 2010
    Co-Authors: Gabriele Tonello, Stefano Maschio, Erika Furlani, Dino Minichelli, Sergio Brückner, E. Lucchini
    Abstract:

    The present paper reports on the results of some experiments on the progress of a previous research and describes the production, in single fast firing, of tiles containing 30 wt% of a natural red clay and a mixture of 42 wt% of paper mill sludge and 28 wt% of Glass Cullet which were coated with a commercial “matt white” glaze. Fired materials were characterized as a function of the top temperature (1090 or 1140 °C) reached during the fast sintering process made in an industrial roller kiln. It is observed that tiles fired at 1090 °C display the best overall performances since the matt glaze well covers the substrate concurring to maintain in line with the official standard for production the mechanical and physical properties of the tiles.

  • Sintering Behaviour of Ceramics Containing Paper Sludge, Glass Cullet and Different Types of Clayey Materials
    Advances in Science and Technology, 2010
    Co-Authors: Erika Furlani, Stefano Maschio, Gabriele Tonello, Eleonora Aneggi, Dino Minichelli, Sergio Brückner, E. Lucchini
    Abstract:

    The sintering behaviour of several ceramics prepared using a previously selected mixture of incinerated paper mill sludge and Glass Cullet which was blended with 10, 20, 30 and 40 wt% of some natural clayey materials has been studied. Three natural commercial product were used: a red clay, a yellow clay and a kaolin. Mixtures were blended by wet attrition milling, dried, sieved, pressed into specimens and then fired for 1 h at temperatures ranging from 1040 to 1140 °C. The resulting materials were characterized by water absorption, shrinkage and crystallographic composition. It was observed that materials containing kaolin display the best overall behaviour independently of the quantity of kaolin introduced. Conversely the optimal sintering temperature, and consequently the best properties of materials prepared using red or yellow clay was found above 1080 °C and depends of their specific composition being affected by the amount of clay added.

Erika Furlani - One of the best experts on this subject based on the ideXlab platform.

  • Glazed tiles produced using paper sludge, Glass Cullet and a natural red clay: an experimental study
    International Journal of Environmental Studies, 2018
    Co-Authors: Erika Furlani, Stefano Maschio
    Abstract:

    AbstractThe paper describes the production, in single fast firing, of tiles containing 30 wt% of a natural red clay and a mixture of 42 wt% of paper mill sludge and 28 wt% of Glass Cullet which were coated with a commercial ‘matt white’ glaze. Fired materials have been characterized as a function of the top temperature (1090 or 1140 °C) reached at the top of the fast sintering process made by an industrial roller kiln. It has been observed that tiles fired at 1090 °C display the best overall performances because the matt glaze well covers the substrate, thus ensuring that the mechanical and physical properties of the tiles conform to the official standard.

  • Recycling Glass Cullet from Waste CRTs for the Production of High Strength Mortars
    2013
    Co-Authors: Stefano Maschio, Gabriele Tonello, Erika Furlani
    Abstract:

    The present paper reports on the results of some experiments dealing with the recycling of mixed cathode ray tube (CRT) Glass waste in the production of high-strength mortars. Waste CRT Glass Cullet was previously milled, and sieved, and the only fine fraction was added to the fresh mortar in order to replace part of the natural aggregate. The addition of superplasticizer was also investigated. All hydrated materials displayed high compressive strength after curing. Samples containing CRT mixed Glass showed a more rapid increase of strength with respect to the reference compositions, and materials with a superplasticizer content of 1% showed the best overall performance due to the favourable influence of the small Glass particles which increase the amount of silicate hydrated produced. The induced coupled plasma (ICP) analysis made on the solutions, obtained from the leaching tests, confirmed the low elution of hazardous elements from the monolithic materials produced and consequently their possible environmental compatibility.

  • Sintering and characterisation of ceramics containing paper sludge, Glass Cullet and different types of clayey materials
    Ceramics International, 2011
    Co-Authors: Erika Furlani, Stefano Maschio, Gabriele Tonello, Eleonora Aneggi, Dino Minichelli, Sergio Brückner, E. Lucchini
    Abstract:

    Abstract The present paper reports on the sintering behaviour of several ceramics prepared using a previously selected mixture of incinerated paper mill sludge and Glass Cullet in the ratio 60/40 which was blended with 10, 20, 30 and 40 wt.% of three different natural materials. The three natural products were: a red quartzitic clay, a yellow quartzitic clay and a kaolin. All mixtures were blended by attrition milling and dried; powders were sieved, pressed into specimens and fired for 1 h at temperatures ranging from 1040 to 1140 °C. The resulting materials were characterized by water absorption, shrinkage, crystallographic composition, microstructure and physico-mechanical properties. It was observed that materials containing kaolin display the best overall behaviour independently of the quantity of kaolin introduced. Conversely the optimal sintering temperature, and consequently the best properties of the materials prepared using red or yellow clay were measured on products fired at temperatures above 1080 °C; materials and temperatures are affected by the amount of clay added.

  • Fast Firing of Glazed Tiles Containing Paper Mill Sludge and Glass Cullet
    Advances in Science and Technology, 2010
    Co-Authors: Gabriele Tonello, Stefano Maschio, Erika Furlani, Dino Minichelli, Sergio Brückner, E. Lucchini
    Abstract:

    The present paper reports on the results of some experiments on the progress of a previous research and describes the production, in single fast firing, of tiles containing 30 wt% of a natural red clay and a mixture of 42 wt% of paper mill sludge and 28 wt% of Glass Cullet which were coated with a commercial “matt white” glaze. Fired materials were characterized as a function of the top temperature (1090 or 1140 °C) reached during the fast sintering process made in an industrial roller kiln. It is observed that tiles fired at 1090 °C display the best overall performances since the matt glaze well covers the substrate concurring to maintain in line with the official standard for production the mechanical and physical properties of the tiles.

  • Sintering Behaviour of Ceramics Containing Paper Sludge, Glass Cullet and Different Types of Clayey Materials
    Advances in Science and Technology, 2010
    Co-Authors: Erika Furlani, Stefano Maschio, Gabriele Tonello, Eleonora Aneggi, Dino Minichelli, Sergio Brückner, E. Lucchini
    Abstract:

    The sintering behaviour of several ceramics prepared using a previously selected mixture of incinerated paper mill sludge and Glass Cullet which was blended with 10, 20, 30 and 40 wt% of some natural clayey materials has been studied. Three natural commercial product were used: a red clay, a yellow clay and a kaolin. Mixtures were blended by wet attrition milling, dried, sieved, pressed into specimens and then fired for 1 h at temperatures ranging from 1040 to 1140 °C. The resulting materials were characterized by water absorption, shrinkage and crystallographic composition. It was observed that materials containing kaolin display the best overall behaviour independently of the quantity of kaolin introduced. Conversely the optimal sintering temperature, and consequently the best properties of materials prepared using red or yellow clay was found above 1080 °C and depends of their specific composition being affected by the amount of clay added.

Vayos Karayannis - One of the best experts on this subject based on the ideXlab platform.

  • fired ceramics 100 from lignite fly ash and waste Glass Cullet mixtures
    Journal of building engineering, 2017
    Co-Authors: Vayos Karayannis, E. Katsika, C. Drossou, A. Domopoulou, A Moutsatsou, Apostolos Baklavaridis
    Abstract:

    Abstract In the present study, the development of new building ceramics is investigated, using 100% lignite fly ash (FA) and waste Glass Cullet (WGC) mixtures as secondary industrial raw materials towards circular economy. Thus, compacted and sintered (at 700 and 900 °C) ceramic bodies based on binary WGC/FA mixtures, with WGC loadings up to 15%, were fabricated. The utilization of WGC (amorphous) aimed at lowering the sintering temperature of the mixture, for energy reduction purposes, via a better heat flux regulation in the material. The successful consolidation/densification of the ceramic microstructures, mainly composed of different silica phases, was achieved upon synergistic sintering at 900 °C for 2 h. Moreover, the successful consolidation/densification was confirmed by the SEM micrograph observation and the porosity evaluation from the SEM micrographs. The addition of WGC yielded to a drastic decrease in the porosity values (down to 12%) for the samples sintered at 900 °C for 2 h. This porosity decrease favored, in turn, the substantial microhardness increase (up to 3833 HV) due to the pore sealing by the Glassy phase of WGC. Moreover, an exponential relationship between microhardness and porosity was revealed. Finally, further investigation of the processing conditions is currently underway towards the optimization of the attained ceramic microstructures in order to meet the requirements of specific applications.

  • Fired ceramics 100% from lignite fly ash and waste Glass Cullet mixtures
    Journal of Building Engineering, 2017
    Co-Authors: Vayos Karayannis, E. Katsika, C. Drossou, A. Domopoulou, A Moutsatsou, Apostolos Baklavaridis
    Abstract:

    In the present study, the development of new building ceramics is investigated, using 100% lignite fly ash (FA) and waste Glass Cullet (WGC) mixtures as secondary industrial raw materials towards circular economy. Thus, compacted and sintered (at 700 and 900 °C) ceramic bodies based on binary WGC/FA mixtures, with WGC loadings up to 15%, were fabricated. The utilization of WGC (amorphous) aimed at lowering the sintering temperature of the mixture, for energy reduction purposes, via a better heat flux regulation in the material. The successful consolidation/densification of the ceramic microstructures, mainly composed of different silica phases, was achieved upon synergistic sintering at 900 °C for 2 h. Moreover, the successful consolidation/densification was confirmed by the SEM micrograph observation and the porosity evaluation from the SEM micrographs. The addition of WGC yielded to a drastic decrease in the porosity values (down to 12%) for the samples sintered at 900 °C for 2 h. This porosity decrease favored, in turn, the substantial microhardness increase (up to 3833 HV) due to the pore sealing by the Glassy phase of WGC. Moreover, an exponential relationship between microhardness and porosity was revealed. Finally, further investigation of the processing conditions is currently underway towards the optimization of the attained ceramic microstructures in order to meet the requirements of specific applications.