Long-Term Performance Study of High Moisture Content Cohesive Soil Subgrade in Seasonal Frozen Region

2013 ◽  
Vol 405-408 ◽  
pp. 49-56
Author(s):  
Sheng Chuan Liu ◽  
Gui Ling Ding ◽  
Gang Chen
Keyword(s):  
Theoretical Analysis ◽  
Water Content ◽  
High Water ◽  
High Water Content ◽  
Test Field ◽  
Frozen Ground ◽  
Freeze Thaw ◽  
Long Term Performance ◽  
Term Performance

This project is aiming at the high water content clay in seasonally frozen ground region, based on the expressway program in Heilongjiang province. By applying laboratory test, field test, field monitoring and theoretical analysis, research has been proposed to understand the deformation law and long-term performance of high water content clay subgrade in freeze-thaw condition. From the comparison test of soil and soil treated with lime, road properties of high water content clay has been found out. It is a very necessary and effective method using lime to treat the high water content clay in subgrade construction. Laboratory freeze-thaw experiments uncover the strength weakening law of soil treated with lime. With theoretical analysis and numerical calculation, the interaction between clayey subgrade and pavement structure layer under effect of vehicle dynamic load is analyzed. According to this result, control standards of subgrade frost heave in seasonally frozen ground region and subgrade resilience modulus in spring have been proposed.

Empirical settlement predictions in overconsolidated Champlain Sea clays

2001 ◽  
Vol 38 (4) ◽  
pp. 720-731 ◽  
Author(s):  
Luc Morissette ◽  
Michel W St-Louis ◽  
Gordon C McRostie
Keyword(s):  
Water Content ◽  
Correction Factor ◽  
Empirical Model ◽  
High Water ◽  
High Water Content ◽  
Overconsolidation Ratio ◽  
Compressibility Index ◽  
Marine Clays

Using settlement observations published for several embankments on marine clays of the Champlain Sea, an empirical model is proposed to estimate long-term settlements. The effect of the overconsolidation ratio is taken into consideration within the model. Footing- and raft-type foundation cases are considered to give guidelines when using the model for these foundation types. A specific embankment resting on a foundation of high water content clay with a high compressibility index demonstrates that a correction factor should be applied under these conditions.Key words: settlement, embankment, Champlain Sea clay, consolidation, empirical model.

scholarly journals Analisis Formalin Secara Kualitatif pada Bakso dan Mie Basah di Kecamatan Sukarame, Wayhalim, dan Sukabumi

KOVALEN ◽  
2020 ◽  
Vol 6 (3) ◽  
pp. 218-223
Author(s):  
Riri Fauziyya ◽  
Anjar Hermadi Saputro
Keyword(s):  
Qualitative Analysis ◽  
Water Content ◽  
Food Products ◽  
High Water ◽  
High Water Content ◽  
Food Preservatives ◽  
Maximum Profit ◽  
Positive Results

Meatballs and wet noodles are foods that are favored by the community. The high water content causes these two types of food to be vulnerable and easily damaged in storage. The addition of chemicals such as preservatives in the manufacture of food products is carried out by producers so that the products are more durable, economical, and produce maximum profit. One chemical that is often misused for food preservatives is formaldehyde. Formalin is a dangerous chemical that is carcinogenic, mutagenic, corrosive, and irritating. This study aims to determine whether there is formalin content in meatballs and wet noodles that are sold in the districts of Sukarame, Wayhalim, and Sukabumi. This research was conducted in a qualitative analysis using Schiff's reagent on 30 samples of meatballs and 30 samples of wet noodles which were sold in Sukarame, Wayhalim, and Sukabumi. The results showed that 10 samples of meatballs and 2 wet noodles showed positive results containing formaldehyde.  This shows that around 33.3% of the meatball sample and 6.66% of the wet noodles sample analyzed were identified to contain formaldehyde so that they are not safe for consumption in the long term and people must be careful in selecting meatballs and wet noodles for consumption. Keywords: Qualitative analysis, formalin, meatballs, wet noodles

Compacted clay-industrial wastes blends: Long term performance under extreme freeze-thaw and wet-dry conditions

2017 ◽  
Vol 146 ◽  
pp. 404-410 ◽  
Author(s):  
Nilo Cesar Consoli ◽  
Koltermann da Silva ◽  
Scheuermann Filho ◽  
André Brum Rivoire
Keyword(s):  
Industrial Wastes ◽  
Compacted Clay ◽  
Freeze Thaw ◽  
Dry Conditions ◽  
Long Term Performance ◽  
Term Performance

Hydraulic/Mechanical Modeling of Smectitic Materials for HMC Analytical Evaluation of the Long Term Performance of TRU Geological Repository

2011 ◽  
Author(s):  
Ichizo Kobayashi ◽  
Hitoshi Owada ◽  
Tomoko Ishii
Keyword(s):  
Specific Surface ◽  
Water Content ◽  
Surface Area ◽  
Specific Surface Area ◽  
Dry Density ◽  
Compression Stress ◽  
Mechanical Modeling ◽  
Long Term Performance ◽  
Term Performance

Aiming at evaluation of the long term performance of transuranic (TRU) geological repositories, the hydraulic/mechanical/chemical (HMC) analysis method has been studied. In this phase of research (four years) the hydraulic/mechanical modeling of smectitic materials for HMC analyses has been studied. In this paper, new experimental methods for investigation of the hydraulic/mechanical behavior of smectitic materials were developed. For hydraulic modeling, the measurement method of the specific surface area of compacted smectitic materials was developed using X-ray diffraction (XRD). The results of the method were applied to the Kozeny-Carman law. Since the specific surface area represents the microstructure of smectitic materials such as the degree of swelling, it was found that the Kozeny-Carman law using measured specific surface area of compacted smectitic materials was useful in evaluating the hydraulic performance of smectitic materials. Moreover, since the Kozeny-Carman law can take the alteration of content of pore water into consideration by not only a coefficient of viscosity but also by changes in specific surface area, the Kozeny-Carman law will be more suitable to chemical and mechanical couple analyses than the ordinary Darcy’s law. For the mechanical modeling, the procedure of one dimensional exhausting compression test was developed. The tests gave the dry density and compression stress relation in the state of full-saturation of smectitic materials with varying water content. The relations between the dry density and compression stress in the state of fully-saturation were termed fully saturation lines. The group of isograms of degree of saturation and water content were also given with this test. It was found that the fully-saturation line is consistent with swelling deformation-pressure relation in the equilibrium state. The results indicated that the swelling deformation-pressure relation does not depend on the saturation manner, such as the injecting of water or exhausting of air due to compression. There will be, therefore, the possibility that the swelling deformation-pressure relation will be state functions and independent on the stress history. The fully-saturation line was compared with the equilibrium swelling pressure and dry density relation calculated from chemical potential by Sato (2008). Both were consistent with each other. It was found that the swelling behavior of smectitic materials can be treated as a state function in the mechanical analysis.

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