Estimation of Coupled Thermo-Physical and Thermo-Mechanical Properties of Porous Thermolabile Ceramic Material Using Hot Distortion Plus® Test

In the paper the thermo-mechanical phenomena which occur in thermal shocked thermolabile porous ceramic material were described. Such materials are applied in foundry industry for mould making and they are characterized the low thermal stability losing its strength above 400°C. In [3] the usefulness of Hot Distortion Plus® to estimate the thermo-physical parameters (apparent thermal conductivity, heat capacity) was discussed. These parameters are necessary in data base of simulation codes which permit to simulate the phenomena in casting-mould system. The aim of these tests is to predict the mould material phenomena influence on castings quality. Parameters applied in these thermo-mechanical models (Young's modulus, Poisson's ratio, Yield stress) and their variations with temperature are not really known for thermal unstable mould material. There is no adapted method in literature and description of such total investigations of both parameters groups: thermo-physical and thermo-mechanical. The author's method called Hot Distortion Plus® consists in acquisition of temperature curves of heated sample of material and correlation with curves of their dilatation. Following the simulation using inverse solution method to reproduce the measured parameters with experiment was applied. The tests were carried out for the new quartz sand bonded by resin (approx. 1%). The specimens (dimensions 114 × 25 × 6mm) from binder-sand mixture were made using special core-box.

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Porous Ceramic Material Based on Clay And Waste of Production of Granite Rubble

Stroitel nye Materialy ◽

10.31659/0585-430x-2019-770-5-45-50 ◽

2019 ◽

Vol 770 (5) ◽

pp. 45-50

Author(s):

S.N. LEONOVICH ◽

◽

D.V. SVIRIDOV ◽

A.L. BELANOVICH ◽

L.S. KARPUSHENKOVA ◽

...

Keyword(s):

Ceramic Material ◽

Porous Ceramic

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WATER QUALITY OF POST CONTAMINATION OF MARINE DEBRIS IN THE KUTA BEACH OF BALI

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.28930/jitkt.v9i1.17917 ◽

2017 ◽

Vol 9 (1) ◽

pp. 57

Author(s):

Aprizon Putra ◽

Semeidi Husrin

Keyword(s):

Water Quality ◽

Sea Water ◽

Measurement Data ◽

Ocean Waves ◽

Quality Parameters ◽

Marine Debris ◽

Physical Parameters ◽

White Sand ◽

Foreign Countries ◽

Value Range

Kuta Beach of Bali is one of the top tourist destination for a vacation in Bali Island. The beauty of the beach with white sand, ocean waves are excellent for surfing, sunset, and tourism infrastructure which detailed makes very famous Kuta beach to foreign countries. However, in recent years the beauty of Kuta beach which has become an icon of tourism in Bali began plagued by high levels of contaminant of the marine debris on the beach, mainly contamination of the marine debris that often accumulate in Kuta beach every season West. The purpose of this study was to determine the condition of water quality based the quality standards of sea water KMNLH Number 51 Years 2004 post contamination of the marine debris that occurred in the Kuta beach of Bali. The method used is to perform measurements using a "Water Quality Checker" at 8 measuring stations. Water quality parameters which measured, namely physical parameters (temperature, turbidity) and chemical parameters (pH, salinity, DO). The results showed a temperature with the range of value 29.10-29.40°C, turbidity with the value range 0.30-18.70 NTU, pH with the value range 8.10-8.15 DO with the value range 6.85-7.38 mg/L and salinity with the value range 30.60-30.90%o. Based on the measurement data obtained indicates conditions of the waters chemistry of still suitable and condition of the waters physical showed the value of the temperature is still suitable, except the turbidity value shows the value does not suitable in the station 1, 2 and 8. Keywords: Bali, water quality, Kuta Beach, marine debris

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RESPONSE SURFACE METHODOLOGY VIA DESIRABILITY FUNCTION TECHNIQUES FOR OPTIMIZING CORRELATED RESPONSES OF ELECTRICAL CONDUCTIVITY AND TOTAL DISSOLVED SOLIDS OF SELECTED BOREHOLE WATER

FUDMA Journal of Sciences ◽

10.33003/fjs-2020-0403-236 ◽

2020 ◽

Vol 4 (3) ◽

pp. 333-342

Author(s):

KEHINDE MONSURU YUSUFF ◽

M. Lawal ◽

A. T. Audu ◽

O. A. Wale-Orojo

Keyword(s):

Water Quality ◽

Electrical Conductivity ◽

Response Surface Methodology ◽

Response Surface ◽

Water Source ◽

Total Dissolved Solids ◽

Quality Parameters ◽

Water Quality Parameters ◽

Physical Parameters ◽

Dissolved Solids

The health benefits in the description and observation of quantitative contents of quality parameters present or contained in any water source cannot be underestimated as they determine selection of best choice from available water sources for different intended uses as well as resource consumption. It also helps to compare the observed quantity of the quality with the acceptable standards or limits to get desired results. Physical parameters like pH, temperature, electrical conductivity (EC) and total dissolved solids (TDS) among others are determined by present of other chemical properties like Cations (Mg2+, Ca2+, Na+, etc), Anions (Cl-, NO3-, SO42+, etc), heavy metals and other dissolved materials during the course of its formation in different proportions and amounts. This study observed EC and TDS of 20 selected boreholes as two close and correlated water quality parameters as well as two of the major water quality parameters that account for overall quality of any water source, despite their different quantitative contents and physical features, they are likely determined by the same set of cations and anions with similar constraint equations. In contrast to linear programming, multiple criteria optimization models were fitted for EC and TDS using Response Surface Methodology via desirability techniques, optimal values obtained in this case measured against several criteria are found to lie between acceptable standards limits for drinking water, other numerical values and descriptive features in the final results reflect that the response equations obtained were well fitted.

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Preparation of Macroporous Ceramic Materials by Using Aluminium Powder as Foaming Agent

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.699.336 ◽

2014 ◽

Vol 699 ◽

pp. 336-341 ◽

Cited By ~ 1

Author(s):

Nurulfazielah Nasir ◽

Ridhwan Jumaidin ◽

Hady Efendy ◽

Mohd Zulkefli Selamat ◽

Goh Keat Beng ◽

...

Keyword(s):

Ceramic Material ◽

Reaction Rate ◽

Porous Alumina ◽

Porous Ceramic ◽

Ceramic Materials ◽

Calcium Sulphate ◽

Alumina Ceramic ◽

Deionized Water ◽

Foaming Agent ◽

Aluminium Powder

Aluminium powder was used as foaming agent in the production of macro-porous alumina ceramic. The porous ceramic material was developed by mixing an appropriate composition of cement, aluminium powder (Al), alumina (Al2O3), calcium oxide (CaO), gypsum (calcium sulphate dehydrate, CaSO4.2H2O), silica powder and deionized water. Different compositions of porous ceramic were produced at 2wt.%, 3wt.% and 4wt.% of aluminium powder. Their mechanical properties and macro-porosity structural of the porous ceramic material were analysed and compared. It is determined that the optimal properties of porous ceramic material were found at 3wt.% of aluminium powder and degraded drastically at 4wt.%. This phenomenon is due to the chemical reaction between the aluminium powder and DI water in which they form aluminium oxide that promotes the strength of the material but at the same time, more pores are created at higher reaction rate between these two fundamental materials.

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Multi-Purpose Porous Ceramic Material

Materials Science Forum ◽

10.4028/www.scientific.net/msf.931.594 ◽

2018 ◽

Vol 931 ◽

pp. 594-597

Author(s):

Yu.S. Bagaiskov

Keyword(s):

Ceramic Material ◽

Construction Material ◽

Porous Ceramic ◽

Ceramic Composites ◽

Refractory Clay ◽

Treatment Processes ◽

Wide Range ◽

Porosity And Permeability ◽

And Performance ◽

Criteria For Evaluation

The main criteria for evaluation of ceramic products’ properties are strength, structural and mechanical, and thermophysical properties. To produce ceramic composites with a wide range of structural, mechanical, strength, and performance properties depending on application, various additives (flux agents, sintering agents, fillers) and heat treatment processes are used. Studies to determine a rational mixture composition have been carried out. A multipurpose material, comprising particles of the basic chamotte filler (burned clay) with a bonding agent in the form of refractory clay from the Latnenskoye deposit with a field spar fluxing agent, an additional filler made of heat-resistant silicon carbide, and an adhesive component in the form of powdered dextrin, is suggested. According to the combination of its ensured parameters, the obtained ceramic material can be multipurpose. Its degree of porosity and permeability make the material filtering, sound-proofing, and heat-retaining; considering the low density, it can be used as a lightweight construction material.

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Assessing biodiesel quality parameters for wastewater grown Chlorella sp.

Water Science & Technology ◽

10.2166/wst.2017.223 ◽

2017 ◽

Vol 76 (3) ◽

pp. 719-727 ◽

Cited By ~ 7

Author(s):

Samadhan Yuvraj Bagul ◽

Randhir K. Bharti ◽

Dolly Wattal Dhar

Keyword(s):

Tap Water ◽

Cetane Number ◽

Acid Methyl Ester ◽

Dry Weight ◽

Quality Parameters ◽

Biodiesel Production ◽

Physical Parameters ◽

Fuel Quality ◽

Cold Filter Plugging Point ◽

Chlorella Sp

Microalgae are reported as the efficient source of renewable biodiesel which should be able to meet the global demand of transport fuels. Present study is focused on assessment of wastewater grown indigenous microalga Chlorella sp. for fuel quality parameters. This was successfully grown in secondary treated waste water diluted with tap water (25% dilution) in glass house. The microalga showed a dry weight of 0.849 g L−1 with lipid content of 27.1% on dry weight basis on 21st day of incubation. After transesterification, the yield of fatty acid methyl ester was 80.64% with major fatty acids as palmitic, linoleic, oleic and linolenic. The physical parameters predicted from empirical equations in the biodiesel showed cetane number as 56.5, iodine value of 75.5 g I2 100 g−1, high heating value 40.1 MJ kg−1, flash point 135 °C, kinematic viscosity 4.05 mm2 s−1 with density of 0.86 g cm3 and cold filter plugging point as 0.7 °C. Fourier transform infra-red (FTIR), 1H, 13C NMR spectrum confirmed the chemical nature of biodiesel. The results indicated that the quality of biodiesel was almost as per the criterion of ASTM standards; hence, wastewater grown Chlorella sp. can be used as a promising strain for biodiesel production.

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Variability of energy woodchips and their economic effects

Folia Forestalia Polonica ◽

10.1515/ffp-2016-0007 ◽

2016 ◽

Vol 58 (2) ◽

pp. 62-71 ◽

Cited By ~ 3

Author(s):

Arkadiusz Gendek ◽

Tomasz Nurek

Keyword(s):

Power Plant ◽

Water Content ◽

Quality Parameters ◽

Ash Content ◽

Economic Effects ◽

Physical Parameters ◽

Transport Distance ◽

Green Matter ◽

Forested Areas ◽

Average Water

Abstract The main aim of the work is to assess physical parameters of forest woodchips and their impact on the prices achieved by the supplier in transactions with a power plant. During fragmentation of logging residue, high content of green matter and contaminants negatively impacts the quality parameters that serve as basis for settlements. The analysis concerns data on the main parameters - water content, fuel value, sulphur and ash content - from 252 days of deliveries of forest chips to a power plant. The deliveries were realised from forested areas on an average about 340 km from the plant. Average water content and the resultant fuel value of forest chips was within 27-47% and 8.7-12.9 GJ×Mg-1 (appropriately), respectively. They depend on the month in which they are delivered to the power plant. The threshold values for the above-mentioned parameters are set by the plant at a real level and the suppliers have no problems with meeting them. The parameter that is most frequently exceeded is ash content (11.5% of cases). The settlement system does not differentiate on the basis of the transport distance but gives possibility to lower the settlement price when the quality parameters are not met but provides no reward for deliveries with parameters better than the average ones. On the basis of results obtained, it was calculated that average annual settlement price is lower than the contract price by about 0.20 PLN×GJ-1, which in case of the analysed company may translate into an average daily loss of about 700 PLN.

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Modelling a Structural-Acoustic Coupled System with an Equivalent Lumped Parameter Mechanical System

Journal of Vibration and Acoustics ◽

10.1115/1.2894002 ◽

1999 ◽

Vol 121 (4) ◽

pp. 453-459 ◽

Cited By ~ 10

Author(s):

S. M. Kim ◽

M. J. Brennan

Keyword(s):

Coupled System ◽

Acoustic Mode ◽

Physical Parameters ◽

Acoustic System ◽

Acoustic Modes ◽

Lumped Parameter ◽

Resonance Frequencies ◽

Mechanical Models ◽

Equivalent Mass ◽

Physical Insight

This paper describes the way in which a structural acoustic coupled system can be modelled using an equivalent lumped parameter mechanical model. The impedance-mobility approach is first used to model the system, and by relating the physical parameters to equivalent mass and stiffness, lumped parameter models can be derived provided that damping in the acoustic system is neglected in all modes, but the first (zero order) mode. A limitation of this approach, however, is that these simple mechanical models formulated in terms of the uncoupled structural and acoustic modes are only possible for either a single structural mode coupled to many acoustic modes, or a single acoustic mode coupled to many structural modes. These models facilitate physical insight into the dynamic behavior of a lightly-damped structural-acoustic system at frequencies close to the resonance frequencies of the coupled system.

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Sensitivity analysis of crude oil’s physical properties to total freezing time

Thermal Science ◽

10.2298/tsci180612100l ◽

2020 ◽

Vol 24 (6 Part A) ◽

pp. 3735-3747

Author(s):

Yang Liu ◽

Ying Xu ◽

Xiaoyan Liu ◽

Qinglin Cheng ◽

Xin Nie ◽

...

Keyword(s):

Heat Transfer ◽

Crude Oil ◽

Solution Method ◽

Convection Heat Transfer ◽

Orthogonal Test ◽

Maximum Temperature ◽

Physical Parameters ◽

Freezing Time ◽

Factors Affecting ◽

Main Factors

The physical parameters of crude oil are one of the main factors affecting the heat transfer of phase change. A mathematical model for a hot oil overhead pipeline was established, taking latent heat impact, the non-Newtonian properties of crude oil, and nature convection heat transfer into account. Compared with the experimental data, the model and the solution method were correct. A criterion was made to estimate the crude oil total freezing in a pipeline by tracking the change trajectory of the maximum temperature point. The effects of the crude oil with average properties on the total freezing time in a pipeline were analyzed, and the sensitivity of the different influencing factors was investigated by orthogonal test.

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Behavior of compacted Ca-bentonite subjected to HMC loading: observations and interpretation

MATEC Web of Conferences ◽

10.1051/matecconf/202133704004 ◽

2021 ◽

Vol 337 ◽

pp. 04004

Author(s):

Takayuki Motoshima ◽

Sachie Iso ◽

Tomoyoshi Nishimura

Keyword(s):

Chemical Properties ◽

Swelling Pressure ◽

Simulation Models ◽

Radioactive Waste Disposal ◽

Physical Parameters ◽

Unconfined Compression ◽

Unconfined Compression Test ◽

Sand Mixture ◽

Pressure Test ◽

Calcium Bentonite

This study presents result of HMC experimental test and discussions of chemical effort in Cabentonite. SWCC test, swelling pressure test and unconfined compression test as hydro-mechanical-chemical (HMC) test were applied to Cabentonite-sand mixture. Na-type bentonite has been studied to predict safety and confidence for artificial barrier layer consist of bentonite that many experimental research reports are represented, and can offer technology advanced comprehensive performance due to mathematical simulation models associated to physical parameters on thermal-hydration-mechanical-chemical properties. This study proposed a significant property for calcium bentonite to relate evaluating safety in radioactive waste disposal system, which emphasised much influence of suction and salinity chloride to hydration-mechanical behaviour for Calcium bentonite.

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