The Experts below are selected from a list of 13197 Experts worldwide ranked by ideXlab platform

Shouwei Jian - One of the best experts on this subject based on the ideXlab platform.

  • utilization of municipal solid waste incineration Bottom Ash in autoclaved aerated concrete
    Construction and Building Materials, 2018
    Co-Authors: Xiangguo Li, Yang Lv, Dongbing Jiang, Wenguang Jiang, Shouwei Jian
    Abstract:

    Abstract The objective of this study was to assess the feasibility of application of municipal solid waste incineration (MSWI) Bottom Ash as a substitute of quartz sand for the preparation of autoclaved aerated concrete (AAC). Influence of substitution mass ratio and fineness of MSWI Bottom Ash on the physical-mechanical properties and microstructure of AAC was investigated. Leaching toxicity was also determined to ensure the environmental safety of AAC with MSWI Bottom Ash. The results demonstrated that the incorporation of MSWI Bottom Ash can reduce the gas-foaming time, compressive strength, density and thermal conductivity. Moreover, compressive strength and density of AAC increase with the increasing of fineness of MSWI Bottom Ash. The reactive silica in the Bottom Ash strongly affected the formation of tobermorite. The needle-like tobermorite in the control sample was transformed into plate-like tobermorite with the increase of Bottom Ash up to 40% and the crumbled foiled tobermorite and grass-like C-S-H structure formed in ACC with 100% Bottom Ash. It is also evident that heavy metal concentrations in the leachates of AAC and autoclaved water are far lower than recommended in the GB5085.3-2007.

  • utilization of municipal solid waste incineration Bottom Ash in blended cement
    Journal of Cleaner Production, 2012
    Co-Authors: Xiangguo Li, Yang Lv, Quanbin Chen, Shouwei Jian
    Abstract:

    Abstract The objective of this study was to assess the feasibility of application of municipal solid waste incineration (MSWI) Bottom Ash as a supplementary cementitious material for the preparation of blended cement. The water demand for normal consistency, setting time, strength and hydration characteristics of MSWI Bottom Ash–cement compound matrices were investigated. The results show that the MSWI Bottom Ash has some cementitious activity, but the reactivity is relatively lower than Portland cement and its addition to cement may lead to retardation of cement hydration. The incorporation content of MSWI Bottom Ash in blended cements was controlled below 30%, which resulted in blended cement of strength class 32.5 according to GB 175-2007 (Chinese National Standard). It is also evident that heavy metal concentrations in leachates of the blended cements with MSWI Bottom Ash are far lower than recommended in the GB5085.3-2007.

Xiangguo Li - One of the best experts on this subject based on the ideXlab platform.

  • utilization of municipal solid waste incineration Bottom Ash in autoclaved aerated concrete
    Construction and Building Materials, 2018
    Co-Authors: Xiangguo Li, Yang Lv, Dongbing Jiang, Wenguang Jiang, Shouwei Jian
    Abstract:

    Abstract The objective of this study was to assess the feasibility of application of municipal solid waste incineration (MSWI) Bottom Ash as a substitute of quartz sand for the preparation of autoclaved aerated concrete (AAC). Influence of substitution mass ratio and fineness of MSWI Bottom Ash on the physical-mechanical properties and microstructure of AAC was investigated. Leaching toxicity was also determined to ensure the environmental safety of AAC with MSWI Bottom Ash. The results demonstrated that the incorporation of MSWI Bottom Ash can reduce the gas-foaming time, compressive strength, density and thermal conductivity. Moreover, compressive strength and density of AAC increase with the increasing of fineness of MSWI Bottom Ash. The reactive silica in the Bottom Ash strongly affected the formation of tobermorite. The needle-like tobermorite in the control sample was transformed into plate-like tobermorite with the increase of Bottom Ash up to 40% and the crumbled foiled tobermorite and grass-like C-S-H structure formed in ACC with 100% Bottom Ash. It is also evident that heavy metal concentrations in the leachates of AAC and autoclaved water are far lower than recommended in the GB5085.3-2007.

  • utilization of municipal solid waste incineration Bottom Ash in blended cement
    Journal of Cleaner Production, 2012
    Co-Authors: Xiangguo Li, Yang Lv, Quanbin Chen, Shouwei Jian
    Abstract:

    Abstract The objective of this study was to assess the feasibility of application of municipal solid waste incineration (MSWI) Bottom Ash as a supplementary cementitious material for the preparation of blended cement. The water demand for normal consistency, setting time, strength and hydration characteristics of MSWI Bottom Ash–cement compound matrices were investigated. The results show that the MSWI Bottom Ash has some cementitious activity, but the reactivity is relatively lower than Portland cement and its addition to cement may lead to retardation of cement hydration. The incorporation content of MSWI Bottom Ash in blended cements was controlled below 30%, which resulted in blended cement of strength class 32.5 according to GB 175-2007 (Chinese National Standard). It is also evident that heavy metal concentrations in leachates of the blended cements with MSWI Bottom Ash are far lower than recommended in the GB5085.3-2007.

Yang Lv - One of the best experts on this subject based on the ideXlab platform.

  • utilization of municipal solid waste incineration Bottom Ash in autoclaved aerated concrete
    Construction and Building Materials, 2018
    Co-Authors: Xiangguo Li, Yang Lv, Dongbing Jiang, Wenguang Jiang, Shouwei Jian
    Abstract:

    Abstract The objective of this study was to assess the feasibility of application of municipal solid waste incineration (MSWI) Bottom Ash as a substitute of quartz sand for the preparation of autoclaved aerated concrete (AAC). Influence of substitution mass ratio and fineness of MSWI Bottom Ash on the physical-mechanical properties and microstructure of AAC was investigated. Leaching toxicity was also determined to ensure the environmental safety of AAC with MSWI Bottom Ash. The results demonstrated that the incorporation of MSWI Bottom Ash can reduce the gas-foaming time, compressive strength, density and thermal conductivity. Moreover, compressive strength and density of AAC increase with the increasing of fineness of MSWI Bottom Ash. The reactive silica in the Bottom Ash strongly affected the formation of tobermorite. The needle-like tobermorite in the control sample was transformed into plate-like tobermorite with the increase of Bottom Ash up to 40% and the crumbled foiled tobermorite and grass-like C-S-H structure formed in ACC with 100% Bottom Ash. It is also evident that heavy metal concentrations in the leachates of AAC and autoclaved water are far lower than recommended in the GB5085.3-2007.

  • utilization of municipal solid waste incineration Bottom Ash in blended cement
    Journal of Cleaner Production, 2012
    Co-Authors: Xiangguo Li, Yang Lv, Quanbin Chen, Shouwei Jian
    Abstract:

    Abstract The objective of this study was to assess the feasibility of application of municipal solid waste incineration (MSWI) Bottom Ash as a supplementary cementitious material for the preparation of blended cement. The water demand for normal consistency, setting time, strength and hydration characteristics of MSWI Bottom Ash–cement compound matrices were investigated. The results show that the MSWI Bottom Ash has some cementitious activity, but the reactivity is relatively lower than Portland cement and its addition to cement may lead to retardation of cement hydration. The incorporation content of MSWI Bottom Ash in blended cements was controlled below 30%, which resulted in blended cement of strength class 32.5 according to GB 175-2007 (Chinese National Standard). It is also evident that heavy metal concentrations in leachates of the blended cements with MSWI Bottom Ash are far lower than recommended in the GB5085.3-2007.

Patrick Germain - One of the best experts on this subject based on the ideXlab platform.

  • Influence of organic matter on municipal solid waste incinerator Bottom Ash carbonation
    Chemosphere, 2006
    Co-Authors: Eva Rendek, Gaëlle Ducom, Patrick Germain
    Abstract:

    The biodegradation of organic matter in municipal solid waste incinerator (MSWI) Bottom Ash was studied in order to investigate the interaction between the CO2 produced by microbial respiration and Bottom Ash. Respiration tests were performed on Bottom Ash at different moisture contents in an incubator at 30 °C. O2 consumption and CO2 production were monitored and quantified. Leaching tests were carried out at the end of the experiments. Total organic carbon (TOC) leaching had decreased. Over a period of three weeks, pH decreased from 10.7 to 8.2 and Bottom Ash was considered to be fully carbonated. This showed that the organic matter found in Bottom Ash can provide a substrate for microbial activity. The CO2 produced by microbial respiration was directly dissolved in Bottom Ash pore water in order to be mineralized in carbonate form. The origin of the carbon dioxide which induces maturation of Bottom Ash on weathering areas has never been really discussed and is often presumed to be atmospheric CO2. However, biodegradation of organic matter could contribute for a large part to this phenomenon, depending on field-scale physico-chemical weathering conditions.

Eva Rendek - One of the best experts on this subject based on the ideXlab platform.

  • Influence of organic matter on municipal solid waste incinerator Bottom Ash carbonation
    Chemosphere, 2006
    Co-Authors: Eva Rendek, Gaëlle Ducom, Patrick Germain
    Abstract:

    The biodegradation of organic matter in municipal solid waste incinerator (MSWI) Bottom Ash was studied in order to investigate the interaction between the CO2 produced by microbial respiration and Bottom Ash. Respiration tests were performed on Bottom Ash at different moisture contents in an incubator at 30 °C. O2 consumption and CO2 production were monitored and quantified. Leaching tests were carried out at the end of the experiments. Total organic carbon (TOC) leaching had decreased. Over a period of three weeks, pH decreased from 10.7 to 8.2 and Bottom Ash was considered to be fully carbonated. This showed that the organic matter found in Bottom Ash can provide a substrate for microbial activity. The CO2 produced by microbial respiration was directly dissolved in Bottom Ash pore water in order to be mineralized in carbonate form. The origin of the carbon dioxide which induces maturation of Bottom Ash on weathering areas has never been really discussed and is often presumed to be atmospheric CO2. However, biodegradation of organic matter could contribute for a large part to this phenomenon, depending on field-scale physico-chemical weathering conditions.