Laboratory Evaluation of Mixing Energy Consumption and Its Influence on Soil-Cement Strength

2004 ◽  
Vol 1868 (1) ◽  
pp. 23-30 ◽  
Author(s):  
Shui-Long Shen ◽  
Jie Han ◽  
Norihiko Miura
Keyword(s):  
Energy Consumption ◽  
Laboratory Evaluation ◽  
Mixing Energy ◽  
Soil Cement ◽  
Cement Strength

IMPROVE ON PERFORMANCE OF INDIRECT CALORIMETRY FOR SMALL PRETERM INFANTS

2001 ◽  
Vol 13 (03) ◽  
pp. 109-115 ◽  
Author(s):  
SHIH-CHING LIN ◽  
CHING-HSING LUO ◽  
TSU-FUH YEH
Keyword(s):  
Oxygen Consumption ◽  
Energy Consumption ◽  
Clinical Research ◽  
Preterm Infants ◽  
Indirect Calorimetry ◽  
Carbon Dioxide Production ◽  
Laboratory Evaluation ◽  
Low Birth Weight Infants ◽  
Accuracy And Precision ◽  
Improved Performance

An indirect calorimetry system of measuring oxygen consumption and carbon dioxide production has been frequently used for preterm infants. The energy consumption and metabolic measurements are based on flow-through technology. The noninvasive measurement feature of the indirect calorimeter is widely used in pediatric clinical research. However, the indirect calorimeter has several limitations for small preterm infants, particularly the ill infant weighing < 1.0 kg. In this paper, we propose some technologies and methodologies to improve the performance of the indirect calorimetry. According to these technologies and methodologies, we redesign the indirect calorimeter proposed in our pervious study. The laboratory evaluation at the different alcohol combustion rates and several exhaust flow rates is used to survey the improved performance. As the results, the accuracy and precision is enhanced by these methods and the lowest oxygen consumption rate, 4.35 ml/min, fits for baby weight of 0.66 kg. It is demonstrated that the performances of new indirect calorimetry are substantially improved. It can be applied to calculate the energy consumption and metabolic rate for low-birth-weight infants in clinical research.

ANALYSIS AND RECOMMENDATIONS ON SANDY CLAY BRICKS WITH CEMENT MIX

2020 ◽  
Vol 92 (6) ◽  
pp. 99-112
Author(s):  
PHARAM SINGH THAPA ◽  
◽  
GOVIND PRASAD LAMICHHANE ◽  
Keyword(s):  
Compressive Strength ◽  
High Performance ◽  
Cement Content ◽  
Low Cost ◽  
Clay Brick ◽  
Clay Bricks ◽  
Sandy Clay ◽  
Soil Cement ◽  
Structural Durability ◽  
Cement Strength

In order to contribute to the sustainability of the brick construction sector, this work studied the formation of economic and environment friendly sandy clay brick. Therefore, the goal was set to be developed, a “sandy clay brick with cement mix”, which has more structural durability, less weight, low cost, together with high performance with respect to indoor air quality. In this research, variation on soil – cement brick with gradual increase in cement content replacing soil material and how the soil- cement brick may be studied using soil and cement as binder by fulfilling the requirement of National Building Code (NBC). The water cement ratio was kept controlled and all other material properties used were same. The effect was seen on compressive strength because the 28 days strength of brick is slightly more when soil is replaced by 15% cement content then no replacement of soil by cement strength. Taking about 11 samples starting from 0 % to 50 % cement content it was found that sandy clay soil – cement brick with compressive strength up to 23.44 MPa with traditional value may be achieved.

A Quantification of Mixing Energy During the Whole Cementing Cycle

2017 ◽  
Author(s):  
Fatemeh Saleh ◽  
Adonis Ichim ◽  
Daniel Mbainayel ◽  
Catalin Teodoriu
Keyword(s):  
Unconfined Compressive Strength ◽  
Energy Input ◽  
Maximum Energy ◽  
Literature Survey ◽  
Experimental Investigations ◽  
Mixing Process ◽  
Cement Slurry ◽  
Mixing Energy ◽  
Well Integrity ◽  
Cement Strength

Various authors have pointed out the importance of cement mixing process and its effect on cement properties. From all cement properties, two are extremely important: the mechanical cement strength (unconfined compressive strength or UCS) and the rheology. The first is critically impacting the well integrity whereas the latter is affecting the pumping ability and displacement in the well, which will also have effects on the well integrity. A previously performed literature survey has pointed out that mixing energy alone may not be sufficient to describe the cement slurry changes, and inferred that shear rate can also impact the final cement properties, such as thickening time or cement strength. Starting from the existing investigations, our goal is to quantify the source of maximum energy input during a conventional cement job and estimate its effect on final cement properties. This paper is showing theoretical and experimental investigations on selected API cements with respect to their properties as a function of mixing energy. The first part of the paper is focusing on the estimation of mixing energy in different section of the cement pathway to the annulus. The second part will show some experimental results and the new way ahead, based on our findings.

Correlations for mixing energy in processes using Rushton turbine mixer‡

2016 ◽  
Vol 70 (6) ◽  
Author(s):  
Grzegorz Story ◽  
Marian Kordas ◽  
Rafał Rakoczy
Keyword(s):  
Energy Consumption ◽  
Mixing Time ◽  
Power Input ◽  
Rotating Magnetic Field ◽  
Mixing Process ◽  
Total Energy Consumption ◽  
Innovative Strategy ◽  
Rushton Turbine ◽  
Mixing Energy ◽  
Dimensionless Energy

AbstractThis study reports the research results on a mixing process using a stirred tank mixer under the action of a rotating magnetic field (RMF). Dimensionless correlations are proposed to predict the power consumption and mixing time for the mixing systems analysed. The results suggest that the mixing behaviour of the experimental set-ups tested may be assessed using the dimensionless mixing energy as the product of the power input and mixing time. In addition, an innovative strategy is proposed on the basis of the synergistic effect of the rotational Rushton turbine and the RMF generator. The values of the dimensionless energy thus obtained were used to compare the mixing process performed by the mixing devices tested. It is shown that the mixing process under the RMF action has significantly higher values of energy consumption than the conventional Rushton turbine. The total energy consumption for the mixing process performed by the RMF mixer may be reduced by concomitant use of a rotational agitator.

scholarly journals Influence of the Mixing Energy Consumption Affecting Coagulation and Floc Aggregation

2017 ◽  
Vol 51 (6) ◽  
pp. 3480-3489 ◽  
Author(s):  
Yamuna S. Vadasarukkai ◽  
Graham A. Gagnon
Keyword(s):  
Energy Consumption ◽  
Mixing Energy

Static mixer proposal for tubular photobioreactors to reduce mixing energy consumption and enhance light–dark cycles

2020 ◽  
Vol 96 (1) ◽  
pp. 113-124
Author(s):  
Yulánderson Salguero‐Rodríguez ◽  
C A Gómez‐Pérez ◽  
Juan P Arango‐Restrepo ◽  
Jairo Espinosa
Keyword(s):  
Energy Consumption ◽  
Static Mixer ◽  
Mixing Energy ◽  
Tubular Photobioreactors

Effect of the Technological Additives on the Properties of Recycled Polyolefins

2019 ◽  
Vol 816 ◽  
pp. 90-95 ◽  
Author(s):  
Svetoslav Isaakovich Volfson ◽  
Larisa Yuryevna Zakirova ◽  
Yulia Sergeevna Karaseva ◽  
Alina Ildusovna Nigmatullina
Keyword(s):  
Thermal Properties ◽  
Energy Consumption ◽  
Surface Defects ◽  
Melt Flow Index ◽  
Flow Index ◽  
Shear Stresses ◽  
Technological Properties ◽  
Melt Flow ◽  
Processing Equipment ◽  
Mixing Energy

Recycling of polymers is an important environmental task. However, during the recycling of polymers many technological problems arise because usually not only one polymer, but also mixtures of polymers are recycled. To improve technological properties, such as increasing fluidity, improving processability and quality, reducing the melt pressure in the spinneret head, addressing surface defects caused by viscosity anomaly and excessive shear stresses, preventing the formation of deposits and residue on the forming tool, increasing productivity, reducing the amount gelic, etc., use processing and technological additives. In the research, the effect of technological additives manufactured by Weihai CY Dendrimer Technology Co., Ltd (China) on the technological and thermal properties of recycled polyolefins was studied. It was shown that the technological additives improved the technological properties of recycled polymers: the mixing energy decreased when receiving compositions, the melt flow index values increased, the thermal properties did not deteriorate. The results show the possibility of using of the technological additives in production to increase the productivity of processing equipment and reducing its energy consumption.

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