Study on the Relations of Strength Control Indicators of Road Subgrade in Shanxi Loess Region

2014 ◽  
Vol 919-921 ◽  
pp. 1160-1163
Author(s):  
Xi Rong Wu ◽  
Li Li Zhu
Keyword(s):  
Moisture Content ◽  
Key Words ◽  
Water Content ◽  
Test Section ◽  
Laboratory Experiments ◽  
Resilient Modulus ◽  
Poor Correlation ◽  
Bearing Plate ◽  
Loess Region ◽  
The Relationship

Typical loess areas of Shanxi test section as the basis, through on-site tests, the paper presents the relationship between filed CBR, compaction,moisture content and on-site bearing plate modulus. Through laboratory experiments, the paper examines the variation of resilient modulus and CBR in different water content and degree of compaction conditions. The correlation between site and interior strength indicators was analyzed and the result shows that indicators tested in laboratory have good correlation while indicators tested in field have poor correlation. Key words: loess; rebound modules; CBR; moisture content;compaction; correlation

Analysis of the Influence of Water Content on Shanxi Loess CBR and Rebound Module

2014 ◽  
Vol 919-921 ◽  
pp. 820-823
Author(s):  
Xi Rong Wu ◽  
Li Li Zhu
Keyword(s):  
Moisture Content ◽  
Water Content ◽  
Resilient Modulus ◽  
Test Methods ◽  
Shanxi Province ◽  
Influence Of Water ◽  
The Times ◽  
Relationship Of ◽  
The Impact ◽  
The Relationship

Selection of five typical loess in Shanxi Province, the paper adopt the indoor test methods to prepares the different compaction and different moisture content specimens which were used to test CBR value and rebound module, analyzes the impact of compactness and moisture content on the CBR value and resilient modulus and establishes the relationship of CBR and moisture content. The result shows that the level of moisture content has great impact on CBR value and rebound module. The CBR value is maximal under optimum moisture content and maximum degree of compaction condition. The times of compaction have little effect on the improvement of CBR with increasing water content. The relationship of the soaking CBR,resilient modulus and the moisture content shows a certain regularity.Key words: Loess filler;the CBR;resilient modulus;compactness;moisture content;relationship

scholarly journals Modeling the Resilient Modulus Variation of In Situ Soils due to Seasonal Moisture Content Variations

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Kevin Gaspard ◽  
Zhongjie Zhang ◽  
Gavin Gautreau ◽  
Khalil Hanifa ◽  
Claudia E. Zapata ◽  
...  
Keyword(s):  
Moisture Content ◽  
Resilient Modulus ◽  
Optimum Moisture Content ◽  
Test Method ◽  
Large Scatter ◽  
Controlling Parameter ◽  
Base Course ◽  
The Relationship ◽  
Level 2

LTRC is conducting a research project to determine the seasonal variation of subgrade resilient modulus (MR) in an effort to implement PavementME. One objective of that project, which is presented in this paper, was to locally calibrate the Enhanced Integrated Climate Model’s (EICM Fenv) curve for seasonal subgrade MR changes. Shelby tube sampling was conducted on six different roadways to a depth of approximately 7.92 m beneath the shoulder pavement’s base course. The AASHTO T-99 MR test method was used on all samples with an additional eight specimens being tested with NCHRP 1–28A MR test method. Four soils from Louisiana which were not from the six roadways were also tested and included in the analyses. Once the MR tests were completed and plotted, it was noticed that there was a rather large scatter (R2 = −0.266) around the EICM Fenv curve. The authors hypothesized that this occurred due to the density differences between in situ and remolded specimens. Further analyses confirmed this hypothesis. LTRC developed a new method based on the EICM Fenv method to determine the relationship between changes in subgrade MR as a function of changes in moisture content with the in situ moisture content and MR used as the control. This method differs from the EICM Fenv in that the EICM Fenv uses optimum moisture content as the controlling parameter. The LTRC method can be used for design purposes as well as level 2 inputs into the EICM.

scholarly journals ANGKA KAPANG DAN KHAMIR PADA LADA PUTIH ASAL BANGKA

2019 ◽  
Vol 5 (2) ◽  
pp. 101
Author(s):  
Oktavio Rosani ◽  
Devy Susanty ◽  
Ary Triyanto
Keyword(s):  
Moisture Content ◽  
Water Content ◽  
High Water ◽  
Quality Standard ◽  
High Water Content ◽  
White Pepper ◽  
Public Consumption ◽  
Mold And Yeast ◽  
The Relationship

Numbers of Mold and Yeast on White Pepper from BangkaWhite pepper is one of Indonesia's spices that are needed for both public consumption and exports. Post-harvest processing of white pepper by farmers is often done with unclean. Each source of white pepper has different water content and will affect the quality of white pepper. In this study, seven samples (S1, S2, S3, S4, S5, S6, S7) were from Bangka. All samples tested had higher water content than SNI quality standard (13%), but still below the quality standard 2 (18%). Sample S2 has the highest water content compared to other samples. Sample S1 and S2 have high Numbers of Mold and Yeast (AKK) and do not suitable with quality standart of BPOM. Of all samples, S2  had the highest AKK (5,51 x 104 colony / g) and sample S5 had the smallest AKK (8,8 x 102 colony / g). This shows the relationship between water content in white pepper with AKK. White pepper that has a high water content has a high AKK, whereas white pepper that has low moisture content has low AKK.Keywords: white pepper, Numbers of Mold and Yeast, moisture contentABSTRAKLada putih adalah salah satu rempah Indonesia  yang  banyak dibutuhkan baik untuk konsumsi masyarakat ataupun ekspor. Proses pengolahan pasca panen lada putih oleh petani sering dilakukan dengan tidak bersih. Setiap sumber lada putih memiliki kadar air yang berbeda dan akan mempengaruhi kualitas lada putih. Pada penelitian ini,tujuh sampel (S1, S2, S3, S4, S5, S6, S7)  berasal dari Bangka. Semua sampel yang di uji memiliki kadar air yang lebih tinggi dari standar mutu 1 SNI (13%), namun masih berada di bawah standar mutu 2 (18 %). Sampel S2 memiliki kadar air yang paling tinggi dibandingkan dengan sampel lainnya. Sampel S1 dan S2 memiliki  (Angka Kapang Khamir) AKK yang tinggi dan tidak memenuhi syarat mutu. BPOM. Dari semua sampel, sampel S2 memiliki AKK paling tinggi (5,51 x 104 koloni/g) dan sampel S5 memiliki AKK paling kecil (8,8 x 102 koloni/g). Hal ini menunjukan hubungan antara kadar air pada lada putih dengan AKK. Lada putih yang memiliki kadar air tinggi memiliki AKK yang juga tinggi, sedangkan lada putih yang memiliki kadar air rendah memiki AKK yang  rendah.Kata Kunci: Lada putih, Angka kapang khamir, Kadar Air

Influence of Variation of Groundwater Level on Deformation of Subgrade Based on Hydromechanical Coupling

2012 ◽  
Vol 457-458 ◽  
pp. 30-33
Author(s):  
Meng Ling Hu ◽  
Hai Lin Yao ◽  
Jie Liu ◽  
Zheng Lu
Keyword(s):  
Water Content ◽  
Water Level ◽  
Groundwater Level ◽  
Laboratory Tests ◽  
Resilient Modulus ◽  
Great Influence ◽  
Coupling Mechanism ◽  
Hydromechanical Coupling ◽  
Subgrade Soil ◽  
The Relationship

Deformation of subgrade caused by variation of groundwater level is a problem of hydromechanical coupling. The coupling mechanism of seepage and deformation of subgrade was analyzed, and a model of hydromechanical coupling was then established. The resilient modulus of the model is related to the water content and compactness of subgrade soil. The relationship between them was obtained based on laboratory tests, and was employed to research the influence of rise of groundwater level on resilient modulus and deformation of subgrade. The results showed that the rise of water level had great influence on resilient modulus of subgrade, and the deformation of subgrade can’t be neglected.

The Design of Moisture Content of Lubricating Oil Detecting System Based on AD5933

2013 ◽  
Vol 401-403 ◽  
pp. 1129-1134
Author(s):  
Qiang Liao ◽  
Wei Dong Fan ◽  
Jiang Wu ◽  
Tao Xu
Keyword(s):  
Mathematical Model ◽  
Moisture Content ◽  
Water Content ◽  
Capacitive Sensor ◽  
Lubricating Oil ◽  
Voltage Amplitude ◽  
Excitation Voltage ◽  
The Mathematical Model ◽  
The Relationship ◽  
Resistance Value

In order to detect lubricating oil moisture content quickly, and replace lubricating oil of equipment in time , impedance type moisture content of lubricating oil detecting system based on AD5933 and cylindrical coaxial capacitive sensor are explored. The paper selected the excitation voltage amplitude and frequency reasonably, and studied the relationship between water content of lubricating oil and impedance value. The result suggests that when the excitation voltage amplitude is 2V, the frequency ranges from 4 kHz to 6 kHz, moisture content of lubricating oil is closely related to impedance value and lubricating oil resistance value decreases with the increase of its moisture content. In addition, the mathematical model between moisture content of lubricating oil and the impedance value is established, moisture content of lubricating oil can be calculated according to the impedance value.

scholarly journals The Effects of Fire on Organic Functional Groups of Peat in Relation to Water Content

2015 ◽  
Vol 19 (3) ◽  
pp. 143
Author(s):  
Said Ramadhan ◽  
Fadly Hairannoor Yusran ◽  
Abdul Haris ◽  
Suhaili Asmawi
Keyword(s):  
Moisture Content ◽  
Water Content ◽  
Functional Groups ◽  
Functional Group ◽  
Water Levels ◽  
Time Interval ◽  
Total Acidity ◽  
Organic Functional Group ◽  
Organic Functional Groups ◽  
The Relationship

The aim of this research was to study the decline of organic functional group through the process of burning in peat. In addition, this study was also to examine the relationship between water content in peat and organic functional group after combustion (burning).  Peat drying was conducted in an oven at a temperature of 75°C with the interval of 0, 1, 2, 3, 4, 5 and 6 hours.  Each time interval had three replicates within two sets of experiments so that the total number of samples were 42 (experimental units).  Variables measured were moisture content, total acidity, COOH groups, and OH-phenolate.  The relationship between the water content with total acidity, COOH groups and OH-phenolate were determined by the equation y = bx + a.  The results showed that the relationship between the water content with organic functional group was linear.  While the relationship between peat water content with organic functional group after burning was irregular, although water levels through the process of burning have been greatly reduced. Keywords: Burning peat; organic functional groups; water content [How to Cite: Said R, FH Yusran, A Haris and S Asmawi. 2014. The Effects of Fire on Organic Functional Groups of Peat in Relation to Water Content. J Trop Soils 19: 143-149. Doi: 10.5400/jts.2014.19.3.143]    

Relationship between Dynamic Modulus and Static Detection Index in Red Sandstone Subgrade

2013 ◽  
Vol 353-356 ◽  
pp. 1112-1115
Author(s):  
Chong Chen ◽  
Jian Long Zheng
Keyword(s):  
Water Content ◽  
Dynamic Modulus ◽  
Resilient Modulus ◽  
Falling Weight Deflectometer ◽  
Red Sandstone ◽  
Bearing Plate ◽  
Static Modulus ◽  
Falling Weight ◽  
Static Detection ◽  
Compaction Ratio

The portable falling weight deflectometer (PFWD) test, bearing plate test, beckman beam test, and compaction test were carried out in this study. The relation of dynamic modulus and static modulus, dynamic modulus and deflection, dynamic modulus and compaction ratio, dynamic modulus and water content (consistency) was built. It turns out that there are good power function regression relationship between dynamic modulus and static modulus, dynamic modulus and deflection, dynamic modulus and compaction ratio, dynamic modulus and water content and consistency. Key words: red sandstone; dynamic modulus; resilient modulus; deflection; compaction ratio; water content

Research on the Impact of Moisture Content on the CBR Value of Shanxi Loess

2013 ◽  
Vol 838-841 ◽  
pp. 80-83
Author(s):  
Xi Rong Wu ◽  
Jun Ming Shen
Keyword(s):  
Moisture Content ◽  
Water Content ◽  
Laboratory Experiments ◽  
Orthogonal Experiment ◽  
Optimum Moisture Content ◽  
Soil Samples ◽  
Shanxi Province ◽  
Sample Category ◽  
The Impact ◽  
Typical Soil

Several typical soil samples in Shanxi Province were selected. Laboratory experiments were adopted to study the CBR of the three kinds of soil samples with different compaction and different water content. Orthogonal experiment was used to analyze the impact of factors including water content, compaction and soil sample category on the CBR value. The result shows that the moisture content has great impact on CBR value and the CBR value is maximize under optimum moisture content and maximum degree of compaction condition, while the not flooded CBR is decrease with the increasing of water content.

Study on Roadbed Soil Dynamic Resilient Modulus Test

2013 ◽  
Vol 671-674 ◽  
pp. 1245-1253 ◽  
Author(s):  
An Hua Xu ◽  
Jian Hong Fang
Keyword(s):  
Water Content ◽  
Test Data ◽  
Data Model ◽  
Resilient Modulus ◽  
Forecast Model ◽  
Deviatoric Stress ◽  
Triaxial Tests ◽  
Subgrade Soil ◽  
The Relationship ◽  
Soil Dynamic

This paper draws on the successful experience from domestic and abroad researches, testing repeatedly of powder subgrade with load triaxial tests, analyzing the relationship between the subgrade soil resilient modulus, deviatoric stress, water content and degree of compaction. At the same time, conducting corresponded roadbed soil resilient modulus forecast model, and qualifying its correctness of test data model.

Energetic relationships for crushing of soil clods

2006 ◽  
Vol 2 (1) ◽  
pp. 51-72
Author(s):  
István Patay ◽  
Virág Sándor
Keyword(s):  
Moisture Content ◽  
Specific Energy ◽  
Soil Moisture Content ◽  
Energy Requirement ◽  
Clay Content ◽  
Clay Soils ◽  
Rigid Support ◽  
Soil Plasticity ◽  
Specific Energy Requirement ◽  
The Relationship

Clod crushing is a principal problem with soils of high clay content. Therefore, there is a need for determining the conditions for clod breaking and clod crushing. The objective of the work was to develop a special purpose tool for single clod breaking both by rigid support of the clod and by a single clod supported by soil and to develop a machine for clod crushing. Furthermore, the purpose was to determine the relationship between the specific energy requirement for clod crushing in the function of soil plasticity and the soil moisture content by the means of the developed tool and machine. The main result of the experiments is summarized in a 3D diagram where the specific energy requirement for soil clod crushing is given in the function of the moisture content and the plasticity index for different clay soils.

Sign in / Sign up

Export Citation Format

Share Document