Magnesium Salt Influenced Strength Behavior of Lime-Fly Ash Stabilized Fine Grained Soil
The fine grained soil subgrade in coastal areas has the characteristics of high underground water level and serious salinization, and the lime-fly ash stabilized soil (LFSS) often used as the road base material. In order to study the effect of magnesium salt on the material strength, 5 % MgCl2 solut...
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Kaunas University of Technology
2020-02-01
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| Series: | Medžiagotyra |
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| Online Access: | http://matsc.ktu.lt/index.php/MatSc/article/view/21825 |
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| author | Zhirong JIA Luxin FU Lizhi WANG |
| author_facet | Zhirong JIA Luxin FU Lizhi WANG |
| author_sort | Zhirong JIA |
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| description | The fine grained soil subgrade in coastal areas has the characteristics of high underground water level and serious salinization, and the lime-fly ash stabilized soil (LFSS) often used as the road base material. In order to study the effect of magnesium salt on the material strength, 5 % MgCl2 solution was used to simulate the groundwater magnesium salt environment, and specimens with 7 d, 14 d, 28 d, 60 d and 90 d curing ages were tested in MgCl2 solution for 1 d, 5 d, 10 d, 15 d or 30 d. A controlled test was also conducted in purified water. Strength mechanism of LFSS was analyzed; SEM test was taken; and the influence mechanism of MgCl2 medium was analyzed. The results showed that MgCl2 medium, immersing time, and curing age have effects on compressive strength of LFSS. More specifically, although the early strength is low, the strength of LFSS maintains slow and steady growth from 7 d to 90 d. Long-term immersing in both MgCl2 solution and purified water will reduce the strength of LFSS, while the strength of specimen immersed in MgCl2 solution will decrease faster. Reactions between MgCl2 and LFSS destroyed the original gels and crystals, causing a negative impact on the strength of LFSS. However, with the test dose of MgCl2, the reduced strength of LFSS can still satisfy the sub-base requirement of second-class highway in China. |
| format | Article |
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| institution | Kabale University |
| issn | 1392-1320 2029-7289 |
| language | English |
| publishDate | 2020-02-01 |
| publisher | Kaunas University of Technology |
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| series | Medžiagotyra |
| spelling | doaj-art-fd8efae465fa45e8a0f0718ee5b6dd5e2025-08-20T03:53:39ZengKaunas University of TechnologyMedžiagotyra1392-13202029-72892020-02-0126337337810.5755/j01.ms.26.3.2182521825Magnesium Salt Influenced Strength Behavior of Lime-Fly Ash Stabilized Fine Grained SoilZhirong JIA0Luxin FU1Lizhi WANG2Shandong University of TechnologySchool of Transportation and Vehicle Engineering, Shandong University of TechnologySchool of Transportation and Vehicle Engineering, Shandong University of TechnologyThe fine grained soil subgrade in coastal areas has the characteristics of high underground water level and serious salinization, and the lime-fly ash stabilized soil (LFSS) often used as the road base material. In order to study the effect of magnesium salt on the material strength, 5 % MgCl2 solution was used to simulate the groundwater magnesium salt environment, and specimens with 7 d, 14 d, 28 d, 60 d and 90 d curing ages were tested in MgCl2 solution for 1 d, 5 d, 10 d, 15 d or 30 d. A controlled test was also conducted in purified water. Strength mechanism of LFSS was analyzed; SEM test was taken; and the influence mechanism of MgCl2 medium was analyzed. The results showed that MgCl2 medium, immersing time, and curing age have effects on compressive strength of LFSS. More specifically, although the early strength is low, the strength of LFSS maintains slow and steady growth from 7 d to 90 d. Long-term immersing in both MgCl2 solution and purified water will reduce the strength of LFSS, while the strength of specimen immersed in MgCl2 solution will decrease faster. Reactions between MgCl2 and LFSS destroyed the original gels and crystals, causing a negative impact on the strength of LFSS. However, with the test dose of MgCl2, the reduced strength of LFSS can still satisfy the sub-base requirement of second-class highway in China.http://matsc.ktu.lt/index.php/MatSc/article/view/21825pavement structurelime-fly stabilized ash soilstabilitymgcl2compressive strength |
| spellingShingle | Zhirong JIA Luxin FU Lizhi WANG Magnesium Salt Influenced Strength Behavior of Lime-Fly Ash Stabilized Fine Grained Soil Medžiagotyra pavement structure lime-fly stabilized ash soil stability mgcl2 compressive strength |
| title | Magnesium Salt Influenced Strength Behavior of Lime-Fly Ash Stabilized Fine Grained Soil |
| title_full | Magnesium Salt Influenced Strength Behavior of Lime-Fly Ash Stabilized Fine Grained Soil |
| title_fullStr | Magnesium Salt Influenced Strength Behavior of Lime-Fly Ash Stabilized Fine Grained Soil |
| title_full_unstemmed | Magnesium Salt Influenced Strength Behavior of Lime-Fly Ash Stabilized Fine Grained Soil |
| title_short | Magnesium Salt Influenced Strength Behavior of Lime-Fly Ash Stabilized Fine Grained Soil |
| title_sort | magnesium salt influenced strength behavior of lime fly ash stabilized fine grained soil |
| topic | pavement structure lime-fly stabilized ash soil stability mgcl2 compressive strength |
| url | http://matsc.ktu.lt/index.php/MatSc/article/view/21825 |
| work_keys_str_mv | AT zhirongjia magnesiumsaltinfluencedstrengthbehavioroflimeflyashstabilizedfinegrainedsoil AT luxinfu magnesiumsaltinfluencedstrengthbehavioroflimeflyashstabilizedfinegrainedsoil AT lizhiwang magnesiumsaltinfluencedstrengthbehavioroflimeflyashstabilizedfinegrainedsoil |