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朴興奎 관동대학교 1984 關大論文集 Vol.12 No.2
This study was attempted in order to search for unconfined compressive strength of Lime-Soil Mixtures, physical, chemical and mechanical test were conducted to find out the standard properties of soil to be used. Various lime contents used in this test were 3%,6%,9% and 12%, and the compressive strength was tested after 7days, 14days and 28days of standard curing in the above each lime content respectively. Obtained the results summarized as follows. 1. Lime content between strength was obtained as follow; OD Soil q=1.511L+13.2(r=0.465) KL Soil q=1.333L+9.0(r=0.500) OL Soil q=1.500L+8.0(r=0.483) 2. In molding the specimens with the optimum moisture content, the maximum strenght appeared at the wet side of the optimum moisture content. 3. According to increase of curing days, unconfiend compressive strength of Line-Soil mixtures increased the rate of increase of the early curing period was large, but approximately 7 day was surfficient to harden Lime-Soil mixtures completely. 4. Optimum moisture content increased with increase of the lime content, but maximum dry density decreased with lime content.
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花崗岩質風化土의 흙시멘트에 關한 硏究 : 다짐試驗에 의한 壓縮强度 An Unconfined Compression Strength by Compaction Test
朴興奎 관동대학교 1985 關大論文集 Vol.13 No.3
This study was attempted in order to search for the properties of the cement mixture with weathered Granite soils. Physical and mechanical tests were conducted to find out the standard properties of the used soil. Various cement contents used in this test were 6%, 8%, 10% and 12% and the compressive strength was tested after 7 days, 14 days and 28 days of standand suring in the above each cement content respectively. The results obtained are summarized as follows. 1. Optimum moisture content and maximum dry density increased with increase of the cement content but was changed ununiformly with cement content. 2. The compressive strength was increased with the cement content and compaction number. 3. As the cement contents were creased, the compressive strength of the cement Mixture with weathered Granite soil were almost proportianlly increased.
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朴興奎 관동대학교 1999 關大論文集 Vol.27 No.2
Statistics has it that coal refuses discarded every year through our coal mines amount to approximate 7 million tons. some 3 to 4 hundred tons piled on each coal mine. Recent years have witnessed the ever-increasing problems of environmental pollutions such as stream pollution. forest damage. and public nuisances. which are allegedly caused by coal refuses. Here we consider that the radical method of mass consumption of coal refuses lies in the good use of them as construction materials This. we are sure. will enable us to clear up a difficult problem of gathering aggregate. to expect to obtain the result of curtailment of expenditure in exploiting the coal mines with the rise-up of added value. and also to make activated community development of coal mine areas which are still stagnant. and also to better the environment in terms of the proper use of refuses. This study aims at investigating the chemical and physical of coal refuses in order to utilize the coal refuses dumped from the domestic coal mines as construction material In this connection. we have made unconfined compression and freezing-thawing tests on the cement-added coal refuses to improve their engineering properties. Test results are It is shown that coal refuses have a lot more favorable engineering properties than general granitic soil in compaction. shearing strength. permeability. and CBR. It is also found out that once we add cement to coal refuses. we can expect to improve durability against the compression strength increase and freezing-thawing. and accordingly to utilize the cement-added coal refuses as subbase and base course
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박흥규,김대영 한국지반공학회 2005 한국지반공학회논문집 Vol.21 No.3
In this research, we have compared and analyzed the value driven from theoretical equation of Boussinesque, Westergaard, Newmark and Kögler with our experimental value from the model test on the underground stress distribution condition. As a result of conducting the Model Test, a change in the underground stress according to the loading was proven to be very similar to the tendency shown in the theories of Westergaard. A tendency of increasing in a straight line was shown in the underground stress according to the increase of loading. When compared to that of the theoretical equation, underground stress values were great until the depth of 15 cm. However, after that depth, a tendency of showing smaller value than that of the theoretical equation was shown. Correlations between Moving Repeated Load (σr) and Underground Stress (Δσ) show Δσ = 0.009·σr - 0.1(depth 60 cm).
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박흥규,김용하,팽우선,이해수 한국지반공학회 2007 한국지반공학회논문집 Vol.23 No.12
This study analyzes the characteristics of creep deformation behavior of weathered granite soils used in road embankments. The creep strain under the unconfined compressive state demonstrated an excellent agreement with the theoretical analysis of the burgers substance. The elastic deformation showed a termination in its characteristics after a long-term period owing to the increase in applied loads. The primary creep strain was 0.0028 and concluded that the deformation completed within 3~5 days after applying the loads. Also, the completing time of creep deformation in the embankment soils increased in proportion to the height of embankment soils. The secondary creep strain is about 50% of the primary creep strain.
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朴興奎 관동대학교 1989 關大論文集 Vol.17 No.1
本 硏究는 다짐을 한 흙의 供試體에 最大 10萬回까지 反復載荷을 加하였을 때 殘留變形 및 彈性變形 그리고 反復後, 一軸壓縮試驗을 行하여 應力一變形率 關係等을 求하였으며, 여기에 영향을 미치는 含水比, 密度, 反復回數, 反復荷重 等에 대해서 검토하였다. This study attempts to examine (1) the residual deformation and elastic deformation derived from the repeated loads (up to the maximum of 100,000 times) on fully compacted the soil specimen, (2) the relation between stress and strain in terms of unconfined compressive test, and (3) water content, dry density, number of cycle, repeated load, etc affecting the stress-strain relation.
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