The Experts below are selected from a list of 258 Experts worldwide ranked by ideXlab platform
Ian Colbeck - One of the best experts on this subject based on the ideXlab platform.
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bipolar charged aerosol agglomeration and collection by a two zone agglomerator
Journal of Environmental Sciences-china, 2001Co-Authors: Xiaodong Xiang, Baozhi Chen, Ian ColbeckAbstract:In older to collect fine particles more efficiently, a new-type electrostatic agglomerator with two zones was developed. The distinguishing feature of this electrostatic agglomerator is that the particles are bipolarly charged and coagulated in the same alternating electric field simultaneously. The Silica Flour with 2 microns mass median diameter and the smoke from burning wood powder were used as test aerosol. The comparison experimental results have shown that when the mean electric field is 4 kV/cm the collection efficiency of the new electrostatic agglomerator was 98.2% for Silica Flour and 67.4% for wood powder smoke. Under the same experimental condition, the collection efficiency of the electrostatic agglomerator with three zones was 97.4% for collecting Silica Flour and the collection efficiency of the electrostatic precipitator was 56.3% for wood powder smoke.
Prasada Rao Rangaraju - One of the best experts on this subject based on the ideXlab platform.
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Influence of Silica Flour–Silica fume combination on the properties of high performance cementitious mixtures at ambient temperature curing
Construction and Building Materials, 2015Co-Authors: Harish Kizhakkumodom Venkata, Prasada Rao RangarajuAbstract:Abstract The compressive strength, chloride ion permeability, bulk density, volume of permeable voids, and drying shrinkage of high performance cementitious mixtures (HPCM) containing both Silica fume (SFU) and Silica Flour (SFL) were studied under ambient-temperature curing. SFU was used as cementitious material in addition to cement; SFL was used as filler material replacing part of the fine aggregate. The use of SFL in combination with SFU increased the early-age compressive strength of HPCM, but decreased the later-age compressive strengths. Based on the results of both thermo-gravimetric analysis and loss on ignition tests, this phenomenon was attributed to the improved hydration of cementitious materials by SFL at early ages, but inhibited continued hydration at later ages. The addition of SFL combined with SFU resulted in further reduction of chloride ion permeability and the volume of permeable voids. The addition of SFL slightly increased the drying shrinkage. Among SFLs with different fineness, the finest SFL which densified the microstructure of HPCM most resulted in the highest drying shrinkage. For HPCM cured under ambient-temperature the use of SFU alone will suffice when used at sufficient dosages; and the addition of SFL along with SFU presents advantages mostly in improving the early-age compressive strengths.
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influence of Silica Flour Silica fume combination on the properties of high performance cementitious mixtures at ambient temperature curing
Construction and Building Materials, 2015Co-Authors: Harish Kizhakkumodom Venkata, Prasada Rao RangarajuAbstract:Abstract The compressive strength, chloride ion permeability, bulk density, volume of permeable voids, and drying shrinkage of high performance cementitious mixtures (HPCM) containing both Silica fume (SFU) and Silica Flour (SFL) were studied under ambient-temperature curing. SFU was used as cementitious material in addition to cement; SFL was used as filler material replacing part of the fine aggregate. The use of SFL in combination with SFU increased the early-age compressive strength of HPCM, but decreased the later-age compressive strengths. Based on the results of both thermo-gravimetric analysis and loss on ignition tests, this phenomenon was attributed to the improved hydration of cementitious materials by SFL at early ages, but inhibited continued hydration at later ages. The addition of SFL combined with SFU resulted in further reduction of chloride ion permeability and the volume of permeable voids. The addition of SFL slightly increased the drying shrinkage. Among SFLs with different fineness, the finest SFL which densified the microstructure of HPCM most resulted in the highest drying shrinkage. For HPCM cured under ambient-temperature the use of SFU alone will suffice when used at sufficient dosages; and the addition of SFL along with SFU presents advantages mostly in improving the early-age compressive strengths.
Xiaodong Xiang - One of the best experts on this subject based on the ideXlab platform.
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bipolar charged aerosol agglomeration and collection by a two zone agglomerator
Journal of Environmental Sciences-china, 2001Co-Authors: Xiaodong Xiang, Baozhi Chen, Ian ColbeckAbstract:In older to collect fine particles more efficiently, a new-type electrostatic agglomerator with two zones was developed. The distinguishing feature of this electrostatic agglomerator is that the particles are bipolarly charged and coagulated in the same alternating electric field simultaneously. The Silica Flour with 2 microns mass median diameter and the smoke from burning wood powder were used as test aerosol. The comparison experimental results have shown that when the mean electric field is 4 kV/cm the collection efficiency of the new electrostatic agglomerator was 98.2% for Silica Flour and 67.4% for wood powder smoke. Under the same experimental condition, the collection efficiency of the electrostatic agglomerator with three zones was 97.4% for collecting Silica Flour and the collection efficiency of the electrostatic precipitator was 56.3% for wood powder smoke.
Baozhi Chen - One of the best experts on this subject based on the ideXlab platform.
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bipolar charged aerosol agglomeration and collection by a two zone agglomerator
Journal of Environmental Sciences-china, 2001Co-Authors: Xiaodong Xiang, Baozhi Chen, Ian ColbeckAbstract:In older to collect fine particles more efficiently, a new-type electrostatic agglomerator with two zones was developed. The distinguishing feature of this electrostatic agglomerator is that the particles are bipolarly charged and coagulated in the same alternating electric field simultaneously. The Silica Flour with 2 microns mass median diameter and the smoke from burning wood powder were used as test aerosol. The comparison experimental results have shown that when the mean electric field is 4 kV/cm the collection efficiency of the new electrostatic agglomerator was 98.2% for Silica Flour and 67.4% for wood powder smoke. Under the same experimental condition, the collection efficiency of the electrostatic agglomerator with three zones was 97.4% for collecting Silica Flour and the collection efficiency of the electrostatic precipitator was 56.3% for wood powder smoke.
Harish Kizhakkumodom Venkata - One of the best experts on this subject based on the ideXlab platform.
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Influence of Silica Flour–Silica fume combination on the properties of high performance cementitious mixtures at ambient temperature curing
Construction and Building Materials, 2015Co-Authors: Harish Kizhakkumodom Venkata, Prasada Rao RangarajuAbstract:Abstract The compressive strength, chloride ion permeability, bulk density, volume of permeable voids, and drying shrinkage of high performance cementitious mixtures (HPCM) containing both Silica fume (SFU) and Silica Flour (SFL) were studied under ambient-temperature curing. SFU was used as cementitious material in addition to cement; SFL was used as filler material replacing part of the fine aggregate. The use of SFL in combination with SFU increased the early-age compressive strength of HPCM, but decreased the later-age compressive strengths. Based on the results of both thermo-gravimetric analysis and loss on ignition tests, this phenomenon was attributed to the improved hydration of cementitious materials by SFL at early ages, but inhibited continued hydration at later ages. The addition of SFL combined with SFU resulted in further reduction of chloride ion permeability and the volume of permeable voids. The addition of SFL slightly increased the drying shrinkage. Among SFLs with different fineness, the finest SFL which densified the microstructure of HPCM most resulted in the highest drying shrinkage. For HPCM cured under ambient-temperature the use of SFU alone will suffice when used at sufficient dosages; and the addition of SFL along with SFU presents advantages mostly in improving the early-age compressive strengths.
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influence of Silica Flour Silica fume combination on the properties of high performance cementitious mixtures at ambient temperature curing
Construction and Building Materials, 2015Co-Authors: Harish Kizhakkumodom Venkata, Prasada Rao RangarajuAbstract:Abstract The compressive strength, chloride ion permeability, bulk density, volume of permeable voids, and drying shrinkage of high performance cementitious mixtures (HPCM) containing both Silica fume (SFU) and Silica Flour (SFL) were studied under ambient-temperature curing. SFU was used as cementitious material in addition to cement; SFL was used as filler material replacing part of the fine aggregate. The use of SFL in combination with SFU increased the early-age compressive strength of HPCM, but decreased the later-age compressive strengths. Based on the results of both thermo-gravimetric analysis and loss on ignition tests, this phenomenon was attributed to the improved hydration of cementitious materials by SFL at early ages, but inhibited continued hydration at later ages. The addition of SFL combined with SFU resulted in further reduction of chloride ion permeability and the volume of permeable voids. The addition of SFL slightly increased the drying shrinkage. Among SFLs with different fineness, the finest SFL which densified the microstructure of HPCM most resulted in the highest drying shrinkage. For HPCM cured under ambient-temperature the use of SFU alone will suffice when used at sufficient dosages; and the addition of SFL along with SFU presents advantages mostly in improving the early-age compressive strengths.