The Experts below are selected from a list of 18162 Experts worldwide ranked by ideXlab platform

Paulo H B Rolim - One of the best experts on this subject based on the ideXlab platform.

  • endless extension of life cycle of construction and demolition wastes as the most efficient environmental technology
    Environmental Technology and Innovation, 2021
    Co-Authors: Carlos E Waltrick, Monica A Avanci, Kirill Alekseev, Karina Querne De Carvalho, Paulo H B Rolim, Rodrigo E Catal
    Abstract:

    Abstract The main purposes of this study were to confirm the life cycle assessment of traditional construction materials (construction and demolition debris, plaster waste lime production waste) as endless due to the possibility of reusing them multiple times without reducing their mechanical properties and sustainability; to determine the physical–chemical processes of recycled composites structure formation. The research was performed by the methods of X-ray powder diffraction, scanning electron microscopy, energy dispersive spectroscopy, and laser micro mass analyses. The sample’s Axial Resistance reached 3.2 MPa on the 3rd day, 8.8 MPa on the 14th day, and up to 16.7 MPa on the 180th day with expansion coefficient values up to 1.81%, water absorption - 14.9%, and apparent density up to 1.95 g/cm 3. The processes of structure formation showed the hardening of the material due to alkaline corrosion of the solid particles’ surfaces with chemical interaction of these alkaline solutions and synthesis of new predominantly amorphous formations of sol–gel CSH-group and carbonates; over time, these new gel formations were converted into a stony state. The obtained results show that developed composites can be returned unlimited times to construction life cycle as valuable components to produce building materials without the use of traditional natural raw materials like sand, rock, stones, clay, and to avoid irreparable destruction of landscapes by quarries for their extraction.

  • environmentally clean materials from contaminated marine dredged sludge wood ashes and lime production wastes
    Journal of Cleaner Production, 2021
    Co-Authors: Cristofer B Scremim, Monica A Avanci, Roberto C Y Pan, Jacqueline C Stella, Joao C Bosco, Paulo H B Rolim
    Abstract:

    Abstract The aim of this study was to develop environment-friendly composites from dredged sediments (DS) from the seaport of Paranagua, Brazil (30–70 wt %), wood ashes (WA) (5–40%), and lime production wastes (LPW) (15–30%). The materials' characterization was carried out by Axial compressive and water Resistance, water absorption, bulk density, XRD, MEV, EDS mapping, LAMMA, and AAS. The samples' Axial Resistance reached 2.39 MPa on the 3rd day, and 8.77 MPa on the 180th day. The water absorption values ranged from 9.5% to 17.2% on the 28th day and from 8.1% to 14.6% on the 90th day. All these changes took place due to the synthesis of amorphous materials, mainly carbonates. The developed composites can be used as road base materials, cementless concrete, non-fired brick and similar sustainable construction materials. The widespread DS use by this ecologically clean method can significantly improve oceans and industrial regions’ environmental situation and decrease natural resource consumption for civil construction.

  • structure formation processes of sustainable construction material from hazardous sewage sludge with additions of wood ash and lime production waste
    The International Journal of Advanced Manufacturing Technology, 2019
    Co-Authors: Clarice De Andrade, Monica A Avanci, Kirill Alekseev, Rodrigo Eduardo Catai, Paulo H B Rolim, Walderson Klitzke, Dimas Agostinho Da Silva, Fernando Augusto Ferraz
    Abstract:

    The main purpose of this work was to look for new application for hazardous sewage sludge, wood ash, and lime production waste for replacement of traditional natural construction raw materials with high environmental efficiency. The composites reached the 13.0 MPa of Axial Resistance strength value on the 28th day with 16.07% of the water absorption values, 1.0% of expansion coefficient, and 1.675 g/cm3 of bulk density. The chemical, mineralogical, and granulometric compositions of the raw and developed materials studied by the complementary XRD, XRF, SEM, EDS, and LAMMA methods demonstrate a new mainly amorphous carbonate synthesis, responsible for the new structures formation with mechanical properties that exceed the requirements of the Brazilian technical standards. The results of the leaching and solubility tests showed their compliance with the Brazilian sanitary standards.

Kirill Alekseev - One of the best experts on this subject based on the ideXlab platform.

  • endless extension of life cycle of construction and demolition wastes as the most efficient environmental technology
    Environmental Technology and Innovation, 2021
    Co-Authors: Carlos E Waltrick, Monica A Avanci, Kirill Alekseev, Karina Querne De Carvalho, Paulo H B Rolim, Rodrigo E Catal
    Abstract:

    Abstract The main purposes of this study were to confirm the life cycle assessment of traditional construction materials (construction and demolition debris, plaster waste lime production waste) as endless due to the possibility of reusing them multiple times without reducing their mechanical properties and sustainability; to determine the physical–chemical processes of recycled composites structure formation. The research was performed by the methods of X-ray powder diffraction, scanning electron microscopy, energy dispersive spectroscopy, and laser micro mass analyses. The sample’s Axial Resistance reached 3.2 MPa on the 3rd day, 8.8 MPa on the 14th day, and up to 16.7 MPa on the 180th day with expansion coefficient values up to 1.81%, water absorption - 14.9%, and apparent density up to 1.95 g/cm 3. The processes of structure formation showed the hardening of the material due to alkaline corrosion of the solid particles’ surfaces with chemical interaction of these alkaline solutions and synthesis of new predominantly amorphous formations of sol–gel CSH-group and carbonates; over time, these new gel formations were converted into a stony state. The obtained results show that developed composites can be returned unlimited times to construction life cycle as valuable components to produce building materials without the use of traditional natural raw materials like sand, rock, stones, clay, and to avoid irreparable destruction of landscapes by quarries for their extraction.

  • structure formation processes of sustainable construction material from hazardous sewage sludge with additions of wood ash and lime production waste
    The International Journal of Advanced Manufacturing Technology, 2019
    Co-Authors: Clarice De Andrade, Monica A Avanci, Kirill Alekseev, Rodrigo Eduardo Catai, Paulo H B Rolim, Walderson Klitzke, Dimas Agostinho Da Silva, Fernando Augusto Ferraz
    Abstract:

    The main purpose of this work was to look for new application for hazardous sewage sludge, wood ash, and lime production waste for replacement of traditional natural construction raw materials with high environmental efficiency. The composites reached the 13.0 MPa of Axial Resistance strength value on the 28th day with 16.07% of the water absorption values, 1.0% of expansion coefficient, and 1.675 g/cm3 of bulk density. The chemical, mineralogical, and granulometric compositions of the raw and developed materials studied by the complementary XRD, XRF, SEM, EDS, and LAMMA methods demonstrate a new mainly amorphous carbonate synthesis, responsible for the new structures formation with mechanical properties that exceed the requirements of the Brazilian technical standards. The results of the leaching and solubility tests showed their compliance with the Brazilian sanitary standards.

  • environmentally clean materials from hazardous red mud ground cooled ferrous slag and lime production waste
    Journal of Cleaner Production, 2017
    Co-Authors: Vsevolod Mymrin, Kirill Alekseev, Rodrigo Eduardo Catai, Otavio M Fortini, Cleber Luis Pedroso, Edgar Winter, Andre Nagalli, Yelaman K Aibuldinov, Eliane B C Costa
    Abstract:

    Abstract New composite materials were developed from red mud, a residue from bauxite mining, which can be used in several applications such as airfield runways, municipal waste dumps, and production of tiles among others. The composites contain 52 to 78 wt % of red mud with pH value near 13.5, ground cooled ferrous slag (20–45%), and lime production waste (2%). The main objectives of this research were to develop new environmentally efficient solutions for these three solid wastes as valuable components of reusable materials and to study their structure formation processes. Different wet mixes of these three wastes were compacted with a force of 10 MPa to cylindrical shapes of 20 × 20 mm, and hardened at 94–96% humidity. The materials had Axial Resistance strength 1.8, 3.4, 6.2 and 11.2 MPa on the 3rd, 7th, 14th, and 365 th days respectively; coefficients of linear expansion ranged between 0.3 and 4.76%, and water absorption ranged from 1.8 to 9.31%. The hardening process was monitored by XRD, SEM, EDS, and LAMMA demonstrating that new mainly amorphous formations are responsible for the materials’ structure formation. Leaching and solubility tests show that the new materials meet environmental standards for the intended applications.

  • construction material from construction and demolition debris and lime production wastes
    Construction and Building Materials, 2015
    Co-Authors: Kirill Alekseev, Rodrigo Eduardo Catai, Ronaldo Luis Dos Santos Izzo, Juliana Lundgren Rose, Andre Nagalli, Cezar Augusto Romano
    Abstract:

    Abstract It was developed a construction material from construction and demolition debris (CDD) and lime production waste (LPW). Beyond it is a viable solution for the utilization of the large amount of lime output residues generated, having in mind that was also found nothing similar in the world literature. There were studies on the parameters of chemical and mineralogy compositions of initial components and final product, Axial Resistance strength, water Resistance and water absorption. The LPW was characterized by a high excess of CaCO 3 . The medium compression Resistance of the samples, cured in air conditions during 3 days is 4.0 MPa, on the 60th day arrived to 13.4 MPa and to 17.1 MPa on the 365th day. The XRD and SEM studies explain the growth of the samples Resistance by the transformation of the initial mineral mixture into carbonates of calcium, carbonates of magnesium, between other carbonates, which led to the growth of amorphous and crystalline new formations. The main advantage expected from these materials is the environmental conservation they afford, represented by the use of CDD and LPW.

Rodrigo Eduardo Catai - One of the best experts on this subject based on the ideXlab platform.

  • structure formation processes of sustainable construction material from hazardous sewage sludge with additions of wood ash and lime production waste
    The International Journal of Advanced Manufacturing Technology, 2019
    Co-Authors: Clarice De Andrade, Monica A Avanci, Kirill Alekseev, Rodrigo Eduardo Catai, Paulo H B Rolim, Walderson Klitzke, Dimas Agostinho Da Silva, Fernando Augusto Ferraz
    Abstract:

    The main purpose of this work was to look for new application for hazardous sewage sludge, wood ash, and lime production waste for replacement of traditional natural construction raw materials with high environmental efficiency. The composites reached the 13.0 MPa of Axial Resistance strength value on the 28th day with 16.07% of the water absorption values, 1.0% of expansion coefficient, and 1.675 g/cm3 of bulk density. The chemical, mineralogical, and granulometric compositions of the raw and developed materials studied by the complementary XRD, XRF, SEM, EDS, and LAMMA methods demonstrate a new mainly amorphous carbonate synthesis, responsible for the new structures formation with mechanical properties that exceed the requirements of the Brazilian technical standards. The results of the leaching and solubility tests showed their compliance with the Brazilian sanitary standards.

  • environmentally clean materials from hazardous red mud ground cooled ferrous slag and lime production waste
    Journal of Cleaner Production, 2017
    Co-Authors: Vsevolod Mymrin, Kirill Alekseev, Rodrigo Eduardo Catai, Otavio M Fortini, Cleber Luis Pedroso, Edgar Winter, Andre Nagalli, Yelaman K Aibuldinov, Eliane B C Costa
    Abstract:

    Abstract New composite materials were developed from red mud, a residue from bauxite mining, which can be used in several applications such as airfield runways, municipal waste dumps, and production of tiles among others. The composites contain 52 to 78 wt % of red mud with pH value near 13.5, ground cooled ferrous slag (20–45%), and lime production waste (2%). The main objectives of this research were to develop new environmentally efficient solutions for these three solid wastes as valuable components of reusable materials and to study their structure formation processes. Different wet mixes of these three wastes were compacted with a force of 10 MPa to cylindrical shapes of 20 × 20 mm, and hardened at 94–96% humidity. The materials had Axial Resistance strength 1.8, 3.4, 6.2 and 11.2 MPa on the 3rd, 7th, 14th, and 365 th days respectively; coefficients of linear expansion ranged between 0.3 and 4.76%, and water absorption ranged from 1.8 to 9.31%. The hardening process was monitored by XRD, SEM, EDS, and LAMMA demonstrating that new mainly amorphous formations are responsible for the materials’ structure formation. Leaching and solubility tests show that the new materials meet environmental standards for the intended applications.

  • construction material from construction and demolition debris and lime production wastes
    Construction and Building Materials, 2015
    Co-Authors: Kirill Alekseev, Rodrigo Eduardo Catai, Ronaldo Luis Dos Santos Izzo, Juliana Lundgren Rose, Andre Nagalli, Cezar Augusto Romano
    Abstract:

    Abstract It was developed a construction material from construction and demolition debris (CDD) and lime production waste (LPW). Beyond it is a viable solution for the utilization of the large amount of lime output residues generated, having in mind that was also found nothing similar in the world literature. There were studies on the parameters of chemical and mineralogy compositions of initial components and final product, Axial Resistance strength, water Resistance and water absorption. The LPW was characterized by a high excess of CaCO 3 . The medium compression Resistance of the samples, cured in air conditions during 3 days is 4.0 MPa, on the 60th day arrived to 13.4 MPa and to 17.1 MPa on the 365th day. The XRD and SEM studies explain the growth of the samples Resistance by the transformation of the initial mineral mixture into carbonates of calcium, carbonates of magnesium, between other carbonates, which led to the growth of amorphous and crystalline new formations. The main advantage expected from these materials is the environmental conservation they afford, represented by the use of CDD and LPW.

Andre Nagalli - One of the best experts on this subject based on the ideXlab platform.

  • environmentally clean materials from hazardous red mud ground cooled ferrous slag and lime production waste
    Journal of Cleaner Production, 2017
    Co-Authors: Vsevolod Mymrin, Kirill Alekseev, Rodrigo Eduardo Catai, Otavio M Fortini, Cleber Luis Pedroso, Edgar Winter, Andre Nagalli, Yelaman K Aibuldinov, Eliane B C Costa
    Abstract:

    Abstract New composite materials were developed from red mud, a residue from bauxite mining, which can be used in several applications such as airfield runways, municipal waste dumps, and production of tiles among others. The composites contain 52 to 78 wt % of red mud with pH value near 13.5, ground cooled ferrous slag (20–45%), and lime production waste (2%). The main objectives of this research were to develop new environmentally efficient solutions for these three solid wastes as valuable components of reusable materials and to study their structure formation processes. Different wet mixes of these three wastes were compacted with a force of 10 MPa to cylindrical shapes of 20 × 20 mm, and hardened at 94–96% humidity. The materials had Axial Resistance strength 1.8, 3.4, 6.2 and 11.2 MPa on the 3rd, 7th, 14th, and 365 th days respectively; coefficients of linear expansion ranged between 0.3 and 4.76%, and water absorption ranged from 1.8 to 9.31%. The hardening process was monitored by XRD, SEM, EDS, and LAMMA demonstrating that new mainly amorphous formations are responsible for the materials’ structure formation. Leaching and solubility tests show that the new materials meet environmental standards for the intended applications.

  • construction material from construction and demolition debris and lime production wastes
    Construction and Building Materials, 2015
    Co-Authors: Kirill Alekseev, Rodrigo Eduardo Catai, Ronaldo Luis Dos Santos Izzo, Juliana Lundgren Rose, Andre Nagalli, Cezar Augusto Romano
    Abstract:

    Abstract It was developed a construction material from construction and demolition debris (CDD) and lime production waste (LPW). Beyond it is a viable solution for the utilization of the large amount of lime output residues generated, having in mind that was also found nothing similar in the world literature. There were studies on the parameters of chemical and mineralogy compositions of initial components and final product, Axial Resistance strength, water Resistance and water absorption. The LPW was characterized by a high excess of CaCO 3 . The medium compression Resistance of the samples, cured in air conditions during 3 days is 4.0 MPa, on the 60th day arrived to 13.4 MPa and to 17.1 MPa on the 365th day. The XRD and SEM studies explain the growth of the samples Resistance by the transformation of the initial mineral mixture into carbonates of calcium, carbonates of magnesium, between other carbonates, which led to the growth of amorphous and crystalline new formations. The main advantage expected from these materials is the environmental conservation they afford, represented by the use of CDD and LPW.

Cristofer B Scremim - One of the best experts on this subject based on the ideXlab platform.

  • environmentally clean materials from contaminated marine dredged sludge wood ashes and lime production wastes
    Journal of Cleaner Production, 2021
    Co-Authors: Cristofer B Scremim, Monica A Avanci, Roberto C Y Pan, Jacqueline C Stella, Joao C Bosco, Paulo H B Rolim
    Abstract:

    Abstract The aim of this study was to develop environment-friendly composites from dredged sediments (DS) from the seaport of Paranagua, Brazil (30–70 wt %), wood ashes (WA) (5–40%), and lime production wastes (LPW) (15–30%). The materials' characterization was carried out by Axial compressive and water Resistance, water absorption, bulk density, XRD, MEV, EDS mapping, LAMMA, and AAS. The samples' Axial Resistance reached 2.39 MPa on the 3rd day, and 8.77 MPa on the 180th day. The water absorption values ranged from 9.5% to 17.2% on the 28th day and from 8.1% to 14.6% on the 90th day. All these changes took place due to the synthesis of amorphous materials, mainly carbonates. The developed composites can be used as road base materials, cementless concrete, non-fired brick and similar sustainable construction materials. The widespread DS use by this ecologically clean method can significantly improve oceans and industrial regions’ environmental situation and decrease natural resource consumption for civil construction.