| Project/Area Number |
15560398
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Civil engineering materials/Construction/Construction management
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| Research Institution | Fukuoka University |
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Principal Investigator |
SOEDA Masashi Fukuoka University, Faculty of Engineering, Assistant Professor, 工学部, 助教授 (50148871)
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| Co-Investigator(Kenkyū-buntansha) |
YAMATO Takeshi Fukuoka University, Faculty of Engineering, Professor, 工学部, 教授 (90078650)
SHIMAOKA Takayuki Kyushu University, Graduate School of Engineering, Professor, 大学院・工学研究院, 教授 (80202109)
MIYAWAKI Kentaro Kyusyu University, Graduate School of Engineering, Assistant Professor, 大学院・工学研究院, 助教授 (00289521)
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| Project Period (FY) |
2003 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2005: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2004: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2003: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | Municipal Solid Waste / Bottom ash / Heavy metals / Chloride ion / Desalination / Fine aggregate / Concrete / Carbonation / 粒度分布 / 都市ゴミ焼却灰 / 走査型電子顕微鏡観察 / 制御型低強度材料 / 流動性 / 粉砕加工 / 物理選別処理 / 塩素化合形態 / フリーデル氏塩 / 化学組成 / X線回折 |
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| Research Abstract |
Scrubber residue of dry scrubber systems from combustion of municipal solid waste (MSW) are almost disposed in ground after the intermediate process. Because MSW incinerator residue show high pH values when brought in contact with water, and high-density chloride, and heavy metals such as Pb are leached. However, the resource recycling of MSW incinerator residue are recently required because of the shortage of the land fill lot and the environmental pollution. This report investigates the role of MSW incinerator residue on the corrosion of steel bars in concrete, and leaching heavy metals from concrete. To study the effects of MSW on the freeze-thaw resistance and the chloride penetration, the accelerated carbonation test and the freezing and thawing test were performed. In the experiments, the water-cement ratio was set to 0.55. The percentages of cement replacement by MSW were selected as 0, 10, 20 and 50% weight. Slump loss of MSW concrete was compensated by the use of a air-entraining and high-range water-reducing agent.
The results of the experiments are summarized as follows :
(1)As for leaching of incineration fly ash, Pb is reduced by aging, while Pb and Cl^- are reduced by washing of incineration fly ash.
(2)The compressive strength of concrete containing incineration fly ash is comparable to that of concrete with no fly ash, though the values slightly vary depending on the fly ash treatment method.
(3)Both the carbonation depth and chloride content of concrete containing aged incineration fly ash tend to increase as the ash content increases.
(4)The quantity of elution of lead from the concrete which replaced sea sand in destruction by fire ash satisfied soil environmental standard in all substitution rates.
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