나트륨系 化學添加劑가 注入된 粘性土의 壓縮强度에 關한 硏究 = Studies on the Unconfined Compressive Strength of the Clayey Soils Injected Sodium System Chemicals

다국어 초록 (Multilingual Abstract)

This study was conducted to investigate the effect of chemicals on the characteristics of com-paction and unconfined compressive strength in brown and black clay soil chemicals.
Unconfined compressive strength and compaction tests were performed by adding of sodium sulfite, sodium chloride, sodium carbonate, calcium chloride, magnesium oxide, lime and plaster to the amount of 0, 2, 4, 6, 8% by weight of dry soil to two kinds of brown and black clays.
After the specimens of soil chemicals were molded, they were cured during 0, 7 and 28 days in the curing chamber having more than 95 percent of relative humidity and 23±1℃ of temperature.
The results obtained were as follows ;
1.The relationship between the maximum dry density and the optimum moisture content of soil chemical mixture showed high correlation and the regression equations were as follows :
2.In the brown and black clay soil chemical mixture, with the addition of more sodium chloride, calcium chloride, sodium carbonate and sodium sulfate, the optimum moisture contents of soil chemical mixtures were decreased, the maximum dry density increased, but with the addition of more magnesium oxide· and lime, the values of the optimum moisture content and the maximum dry density were opposite.
In the brown clay soil chemical mixture, the more the amount of plaster contained, the more was the value of optimum moisture content of soil chemical mixture and the less was the maximum dry density, but in the black clay soil chemical mixture there was not a clear tendency.
3.In the brown clay the unconfined compressive strength of soil chemical mixture adding of sodium chloride, sodium carbonate, calcium chloride, plaster and sodium sulfite was decreased with the addition of more chemicals, but in the case of magnesium oxide and lime, on the contrary unconfined compressive strength was increased.
In the black clay, with the addition of more chemicals, the unconfined compressive strength of soil chemical mixture adding of calcium chloride and sodium carbonate was decreased, but soil chemical mixture adding of lime and magnesium oxide was increased conversely.
The unconfined compressive strength of soil chemical mixture adding plaster was the greatest at the 4 percent of plaster content, those of soil chemical mixtures adding sodium chloride and sodium sulfite were not definite, but were decreased generally.
4.In the brown and black clays, unconfined compressive strength of soil chemical mixture adding sodium chloride, sodium carbonate, sodium sulfite, plaster and calcium chloride was decreased in accordance with the longer curing period, but in case of lime and magnesium oxide was increased on the contrary.
5.In the soil chemical mixture mixed with 8 percent of chemical content to brown clay soil, on the basis of 28-day strength, the effect of chemicals was arranged in the order of lime, magnesium oxide, plaster, sodium carbonate, sodium sulfite, calcium chloride and sodium chloride, in the black clay soil, the order of effect was lime, magnesium oxide, plaster, sodium sulfite, calcium chloride, sodium carbonate and sodium chloride.

목차 (Table of Contents)

• 緖言
• 材料 및 方法
• 1.使用材料
• 2.試驗方法
• 結果 및 考察
• 1.添加劑混合土의 다짐特性
• 2.添加劑混合土의 强要特性
• 摘要
• 引用文獻