Influence of moisture content on the LCPC test results and its implications on tool wear in mechanized tunneling

2018 ◽  
Vol 81 ◽  
pp. 165-175 ◽  
Author(s):  
M.Z. Abu Bakar ◽  
Y. Majeed ◽  
J. Rostami
Keyword(s):  
Moisture Content ◽  
Tool Wear ◽  
Test Results ◽  
Mechanized Tunneling

Medium Density Particleboard with Addition of Impregnated Paper

2014 ◽  
Vol 1025-1026 ◽  
pp. 543-546
Author(s):  
Juliana Cortez Barbosa ◽  
Anderson Luiz da Silva Michelon ◽  
Elen Aparecida Martines Morales ◽  
Cristiane Inácio de Campos ◽  
André Luis Christoforo ◽  
...  
Keyword(s):  
Moisture Content ◽  
Modulus Of Elasticity ◽  
Mechanical Tests ◽  
Modulus Of Rupture ◽  
Medium Density ◽  
Test Results ◽  
Thickness Swelling ◽  
Adhesion Test ◽  
Layer Medium ◽  
Determine Moisture Content

The aim of this research was to produce three-layer Medium Density Particleboard (MDP), with the addition of impregnated paper, in the inner layer, in proportions of 1; 5 and 20%. In this study, MDP was composed with particles of small size in outer layers, and larger particles in internal layer. After panel manufacturing, physical and mechanical tests based on Brazilian Code ABNT NBR 14.810 were carried out to determine moisture content; density; thickness swelling; water absorption; modulus of rupture (MOR) and modulus of elasticity (MOE) in static bending and internal adhesion. Test results were compared to commercial panels, produced with 100% Eucalyptus, considering the requirements specified by Brazilian Code. Properties presented values close to normative specifications, indicating positively the possibility of production of MDP using addition of waste paper impregnated.

Experiment and Optimization of High-Efficiency Mechanical Separation of Peanut Seedlings and Residual Film Based on Suspension Velocity

2021 ◽  
Vol 64 (4) ◽  
pp. 1381-1389
Author(s):  
Fengwei Gu ◽  
Meng Yang ◽  
Zhichao Hu ◽  
Yanhua Zhang ◽  
Chong Zhang ◽  
...  
Keyword(s):  
Moisture Content ◽  
Rotational Speed ◽  
Loss Rate ◽  
Removal Rate ◽  
Performance Tests ◽  
Test Results ◽  
Material Loss ◽  
Validation Test ◽  
Residual Film ◽  
Forage Utilization

HighlightsAn efficient method for separating peanut seedlings and residual film harvested from film-mulched peanut was proposed, and the mechanism was optimized.The relationships between the suspension velocity and moisture content of different shredded materials were studied.Four-factor, three-level Box-Behnken experiments were carried out and analyzed, and the optimal parameter combination was determined.A validation test was carried out to verify the rationality and accuracy of the optimized regression model.Abstract. To address the problems of lower residual film removal and higher material loss in the forage utilization of peanut seedlings wrapped in residual film, this study explored the relationships between the suspension velocity and moisture content of different shredded materials derived from peanut seedlings and conducted performance tests and parameter optimization for a machine that uses peanut seedlings as forage material. Four-factor, three-level Box-Behnken experiments were designed using the rotational speeds of the shredding shaft, upper fans, and lower fans and the frequency of the vibrating sieve as test factors, and using the residual film removal rate and material loss rate as response values. The test results indicated that the suspension velocity of the shredded materials showed a quadratic relationship with moisture content. The performance tests showed that the significance sequence of the test factors for the residual film removal rate was: rotational speed of the lower fans, rotational speed of the upper fans, rotational speed of the shredding shaft, and frequency of the vibrating sieve. The significance sequence for the material loss rate was: rotational speed of the lower fans, rotational speed of the shredding shaft, frequency of the vibrating sieve, and rotational speed of the upper fans. The parameter optimization and validation test showed that the residual film removal rate was 92.71% and the material loss rate was 8.19% when the rotational speeds of the shredding shaft, upper fans, and lower fans were 1650, 770, and 665 rpm, respectively, and the frequency of the vibrating sieve was 4 Hz. The relative errors between the validation test results and the predicted values from the regression models were less than 3%, which suggests that the regression models are reliable. This study provides a reference for the forage utilization of peanut seedlings harvested from film-mulched peanut and provides a reference for determining the optimal working parameters of forage processing machines. Keywords: Agricultural machinery, Box-Behnken experiment, Optimization, Peanut film-seedling separation, Suspension velocity.

scholarly journals PEMANFAATAN KITOSAN DARI CANGKANG RAJUNGAN (Portonus sanginolentus L.) SEBAGAI PENGAWET IKAN KEMBUNG (Rastrelliger sp) DAN IKAN LELE (Clarias Batrachus)

2015 ◽  
Vol 3 (4) ◽  
pp. 18-24
Author(s):  
Rika Silvia ◽  
Sari Wahyu Waryani ◽  
Farida Hanum
Keyword(s):  
Acetic Acid ◽  
Moisture Content ◽  
Shelf Life ◽  
Microbial Activity ◽  
Storage Time ◽  
Chitosan Solution ◽  
Ash Content ◽  
Clarias Batrachus ◽  
Test Results ◽  
Chitin And Chitosan

The use of appropriate anti-microbial compounds can extend the shelf life of a product as well as ensure the safety of the product. That requires a material that is naturally anti-microbial so as not harmful to health. The use of chitosan to inhibit microbial activity on mackerel (Rastrelliger sp) and catfish (Clarias batrachus) to test it's effectiveness. In this research chitosan that used as an anti-microbial extracted from the shells of crabs (Portunus sanginolentus L.). Chitin and chitosan that were successfully extracted were characterized it's results includes moisture content testing, ash content, and degrees of deacetylation. Characterized chitosan, were used as an anti-microbial mackerel (Rastrelliger sp) and catfish (Clarias batrachus). Chitosan was dissolved in 1% acetic acid with varying concentrations of chitosan as 1%, 1.5%, 2%, and 2.5%. The storage time of fish: 0 hours, 10 hours, 15 hours, 20 hours, and 25 hours. The results of research chitosan form as granules / powder, 5% moisture content, ash content  2% and the degree of deacetylation which amounted to 61,08%. Chitosan solution test results on fish showed that fish preservation by soaking with chitosan addition of 1.5% was the best variable and could extend the shelf life of fish  more than 5 hours while fish preservation by spraying gave the best variable with addition of chitosan 2.5% and could extend the shelf life of fish less than 5 hours.

scholarly journals KOMPOSISI KIMIA, SENYAWA BIOAKTIF DAN ANKGA LEMPENG TOTAL PADA RUMPUT LAUT Gracillaria edulis

2017 ◽  
Vol 5 (3) ◽  
pp. 90
Author(s):  
Susanti Musa ◽  
Grace Sanger ◽  
Henny Adeleida Dien
Keyword(s):  
Moisture Content ◽  
Proximate Composition ◽  
Bioactive Compound ◽  
Bacterial Count ◽  
Ash Content ◽  
Plate Count ◽  
Test Results ◽  
Gracilaria Edulis ◽  
Average Value ◽  
Total Plate Count

This study was conducted to determine the proximate composition, bioactive compound and total plate count (TPC) in Gracilaria edulis seaweed. This research used descriptive explorative method. The results showed the average value of moisture content (77.7%); protein content (39.4%); fat content (8.1%); carbohydrates by difference (71.7%); ash content (20.7%) and very low bacterial count. Phytochemical test results show this seaweed contains alkaloids, saponins, flavonoids, and triterpenoids compounds. Penelitian ini dilakukan untuk mengetahui komposisi proksimat, senyawa bioaktif dan angka lempeng total (ALT) pada rumput laut Gracilaria edulis. Penelitian ini menggunakan metode penelitian deskriptif eksploratif. Hasil penelitian menunjukkan nilai rata-rata kadar air (77,7%); protein (39,4%); kadar lemak (8,1%); karbohidrat (71,7%); kadar abu (20,7%) dan jumlah bakteri yang sangat rendah. Hasil uji fitokimia menunjukkan rumput laut ini mengandung  senyawa alkaloid, saponin, flavonoid, dan triterpenoid.

scholarly journals Impact of the moisture content in medium sands on CPTU test results

2016 ◽  
Vol 48 (3) ◽  
pp. 221-231 ◽  
Author(s):  
Łukasz Zawadzki ◽  
Marek Bajda
Keyword(s):  
Moisture Content ◽  
Unsaturated Soils ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Degree Of Saturation ◽  
Test Results ◽  
Time Dynamic ◽  
Tip Resistance ◽  
The Impact ◽  
Resistance Value

Abstract Soils occurring in the soil “active zone” are in contact with the surface and are directly influenced by external factors (mainly climatic changes) that cause variation in their parameters over time. Dynamic and uncontrolled changes of soil properties e.g. due to rainfall and evapotranspiration processes may affect field test results leading to the misinterpretation of the obtained data. This paper presents investigations on the influence of moisture content changes in sandy soils on CPTU results. For this purpose, a field ground model has been constructed and five CPTU tests with a different moisture content of soil were carried out. During the investigations, the tip resistance (qc), friction on sleeve (fs), and pore water pressure (u2) were measured. Moreover, a TDR probe was applied to determine the distribution of the moisture content in the studied soil columns. Differences between CPT results obtained in saturated and unsaturated soils have been shown. Furthermore, a simple equation to correct the tip resistance value due to the impact of the degree of saturation has been proposed.

Influence of interior layer properties to moisture dry-out of CLT walls

2019 ◽  
Vol 46 (11) ◽  
pp. 1001-1009 ◽  
Author(s):  
Villu Kukk ◽  
Annegrete Külaots ◽  
Jaan Kers ◽  
Targo Kalamees
Keyword(s):  
Moisture Content ◽  
Laboratory Test ◽  
Simulation Model ◽  
Initial Moisture Content ◽  
Mineral Wool ◽  
Test Results ◽  
Interior Layer ◽  
Cross Laminated Timber ◽  
Simulation Results ◽  
Dry Out

The objective of this study was to determine the maximum allowable initial moisture content (MC) for cross-laminated timber (CLT) walls having both exterior and interior thermal insulation. A laboratory test was conducted, for which four test walls with two different insulation solutions and two different MCs were built. Based on the test results, a simulation model was configured and simulations using the model were completed. The simulation results determined that the maximum allowable initial MC of the CLT panels was 17% for walls insulated additionally from inside with mineral wool and 15% for CLT wall assemblies insulated with polyisocyanurate (PIR). Based on these results, it was concluded that the allowable MC ranges between 8% and 16% for construction timber, and therefore, using a PIR board as interior insulation for CLT walls should be undertaken with caution given the very small margin for error in MC.

Influence of particle size distribution, test time, and moisture content on sandy stratum LCPC abrasivity test results

2020 ◽  
Vol 80 (1) ◽  
pp. 611-625 ◽  
Author(s):  
Zhengyang Sun ◽  
Zhiyong Yang ◽  
Yusheng Jiang ◽  
Hongji Gao ◽  
Kuanda Fang ◽  
...  
Keyword(s):  
Particle Size ◽  
Moisture Content ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Test Time ◽  
Test Results

scholarly journals Automatic Monitoring and Cutoff of Peanut Dryers

1984 ◽  
Vol 11 (2) ◽  
pp. 58-60 ◽  
Author(s):  
Paul D. Blankenship ◽  
James I. Davidson
Keyword(s):  
Weight Loss ◽  
Moisture Content ◽  
Automatic Monitoring ◽  
Full Scale ◽  
Test Results ◽  
Initial Weight ◽  
Moisture Control ◽  
Final Weight ◽  
Conventional Methods

Abstract A method for automatic cutoff of full-scale peanut dryers when peanuts approach a prescribed moisture content without periodic moisture sampling is described. Final weight is mathematically predicted from initial weight and moisture content. Peanut weight loss is monitored and dryer operation subsequently controlled through electronics. Six of 8 drying wagon loads of peanuts dried with the method were dried to a satisfactory moisture content at grading. Additional drying was required on 2 loads. Test results indicate that the method will require less labor, provide better moisture control, and reduce the danger of overdrying compared to conventional methods.

Analysis for Influence Factors of Cold Recycling Mixture Compaction Test

2012 ◽  
Vol 204-208 ◽  
pp. 1633-1637
Author(s):  
Yong Bing Wang ◽  
Guo Qiang Ying ◽  
Jian Lin Hu ◽  
Hua Wei Wei ◽  
Qian Zhang
Keyword(s):  
Moisture Content ◽  
Water Absorption ◽  
Base Material ◽  
Optimum Moisture Content ◽  
Dry Density ◽  
Surface Material ◽  
Test Results ◽  
Maximum Dry Density ◽  
Compaction Test ◽  
Recycled Material

In order to study the factors which influence the inorganic binder stabilized material’s compaction test results, different recycled material content therefore different reclaimed gradation mixtures are tested while varying the amount of cement. The experiment results show that contents of the recycled base material and the recycled surface material on the compaction test results are determined by the change of their density and water absorption ratio. Dry density of the recycled mixture increases with the increase of the reclaimed base material density. Low water absorption ratio of the recycled material reduces the reclaimed mixture’s optimum moisture content. Density of the reclaimed wearing surface material reduces the maximum dry density of the reclaimed mixture because the old wearing surface material has lower density. Its low water absorption reduces the optimum moisture content of the recycled mixture. Influence of cement content on compaction test results is the increase of the cement content can enhance the maximum dry density and optimum moisture content of the recycled material. Through the analysis of the results of the compaction test, the key factors in the recycled material compaction test are unveiled.

Sign in / Sign up

Export Citation Format

Share Document