| Budget Amount *help |
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
This study describes the effective use of composite recycled materials based on the formation of ettringite in ground improvement applications and its interdisciplinary significance. Recycled basanite is mixed with coal ash and blast furnace slag in varying proportions to obtain the optimal ettringite production.
The unconfined compressive strength increases with increase in composite recycled materials. Based on the observation of internal structure using a scanning electron microscope, ettringite occurrence is related to the strength increase of cement-stabilized soil. The use of composite recycled materials also achieve the acceptable durability against the effects of freeze-thaw and wet-dry cycles. The concentration of fluorine, hexavalent chromium, cadmium and lead decrease with increasing composite recycled materials contents, and to values less than the Japanese environmental quality standard These properties make composite recycled materials useful as a construction material.
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