Effect of Alternative Materials Added to the Plaster Composition

2014 ◽  
Vol 92 ◽  
pp. 127-132
Author(s):  
Nurcan Seyhan ◽  
Aslı Tayçu ◽  
Mehmet Gula ◽  
Arzu Eker ◽  
Kagan Kayaci ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Service Life ◽  
Scanning Electron Microscope ◽  
Water Absorption ◽  
Bending Strength ◽  
Setting Time ◽  
Glass Beads ◽  
Noticeable Effect ◽  
Alternative Materials ◽  
Scanning Electron

In this study, the effect of alternative additives on the properties spred diameter, setting time, bending strength and water absorption of sanitaryware plaster moulds was investigated. The plaster was partially replaced by the alternative additives such as perlite, diatomite and glass beads. Microstructural features of the resultant compositions were determined by scanning electron microscope (SEM). Finally, represantative moulds were produced and their performance was investigated under industrial conditions. It was observed that perlite and diatomite addition deteriorated the strength of plaster moulds and there was no noticeable effect of these additives on casting performance of the plaster moulds. Morever, the presence of glass beads in plaster decreased weight of the moulds without deterioration of moulds service life.

Influence of Calcined CaSO4 Whisker and Dispersion Method on Bending Strength of Gypsum Board

2014 ◽  
Vol 638-640 ◽  
pp. 1350-1353
Author(s):  
Chang Chen ◽  
Yu Bin Wang ◽  
Wei Zhang ◽  
Xiao Yu Xue ◽  
Lei Liu ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Aspect Ratio ◽  
Scanning Electron Microscope ◽  
Bending Strength ◽  
X Ray Diffraction ◽  
Hydration Time ◽  
Gypsum Board ◽  
Dispersion Method ◽  
X Ray ◽  
Scanning Electron

The hydration ability of CaSO4 whiskers calcined under the condition of 475-500 °C for 10-60 min was researched by X-ray diffraction and scanning electron microscope. The optimal calcined CaSO4 whiskers were added into building gypsum and the bending strength of gypsum board was influenced by different dispersion methods. The results show that the whiskers calcined under 475 °C for 30 min begin to hydrate and the aspect ratio of whisker calcined under 500 °C and 525 °C has no changed for 1 h of hydration time. The bending strength value of gypsum board with ultrasonic dispersed whisker is lower than that of gypsum board with directly mixed whisker.

Influence of hydraulic conductance of xylem on water status in cuttings

1986 ◽  
Vol 16 (1) ◽  
pp. 98-102 ◽  
Author(s):  
Takefumi Ikeda ◽  
Tamio Suzaki
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Water Absorption ◽  
Water Potential ◽  
Water Flow ◽  
Water Status ◽  
Total Resistance ◽  
Low Level ◽  
Bordered Pits ◽  
Scanning Electron

The reduction in water potential of cuttings after planting in water closely was related to an increase in resistance to water flow in the xylem. From observations of water-conducting tissues using a scanning electron microscope, the increase in resistance to water flow of cuttings was caused by blockage of vessel lumens with tyloses for Populuscarolinensis and aspiration of bordered pits for Cryptomeriajaponica. Water status of cuttings decreased with time after planting and was maintained at a low level by water absorption through bark. After rooting, the total resistance to water flow decreased and the water status of cuttings increased.

The Effects of Na2SiO3/NaOH Ratios on the Volumetric Properties of Fly Ash Geopolymer Artificial Aggregates

2019 ◽  
Vol 967 ◽  
pp. 228-235
Author(s):  
I Dewa Made Alit Karyawan ◽  
Januarti Jaya Ekaputri ◽  
Iswandaru Widyatmoko ◽  
Ervina Ariatedja
Keyword(s):  
Electron Microscope ◽  
Fly Ash ◽  
Scanning Electron Microscope ◽  
Specific Gravity ◽  
Water Absorption ◽  
Asphalt Mixture ◽  
Interfacial Transition Zone ◽  
Volumetric Properties ◽  
Test Results ◽  
Scanning Electron

This study was conducted as a part of a research to assess the influence of the volumetric properties of geopolymer artificial aggregates made of fly ash to the performance of asphalt mixture to be used in pavement layers. This paper presents the parameters adopted during the production of geopolymer artificial aggregates which may affect the volumetric properties and the structure of the aggregates. The investigated volumetric properties included specific gravity and water absorption. In the experiment laboratory, two variables were utilized for producing the artificial aggregates, which might affect the considered volumetric properties. Those variables are pan-granulator slopes and alkaline ratios (the ratios of Sodium Silicate to Sodium Hydroxide). The pan-granulator slopes were set at 3 different angles, i.e. 45o, 50o, and 55o. The selected alkaline ratios were 1.5, 2.0, 2.5, and 3.0. The test results indicated that the best volumetric properties were obtained at a slope of 50o and alkaline ratio of 2.5. The bulk specific gravity values at the best volumetric properties were found to be: 1) oven dry at 1.9 grams/cm3; 2) saturated surface dry (SSD) at 2.0 grams/cm3, and 3) apparent at 2.1 grams/cm3 with 6% water absorption. In addition, the interfacial transition zone and microstructure aggregates were examined by using Scanning Electron Microscope (SEM). In this study, it was found that there were effects of Na2SiO3/ NaOH ratios and the granulation method on the volumetric properties.

Preparation and Characterization on PU/CS Nanofiber Membrane

2012 ◽  
Vol 268-270 ◽  
pp. 193-197
Author(s):  
Long Jiao ◽  
Wei Min Kang ◽  
Bo Wen Cheng
Keyword(s):  
Mechanical Property ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Water Absorption ◽  
Nanofiber Membrane ◽  
Electrostatic Spinning ◽  
Moisture Permeability ◽  
Antibacterial Performance ◽  
Scanning Electron

PU/CS nanofiber membrane was prepared by means of electrostatic spinning. The morphology of nanofiber membrane was examined by a scanning electron microscope (SEM), and the mechanical property, water absorption, moisture permeability and antibacterial performance were also investigated. The results show that the diameter and mechanical property of PU/CS nanofiber decreased with the increase of the content of CS. However, the water absorption, moisture permeability and antibacterial performance were improved significantly with the addition of CS.

Study on Hole-Sealing Coating of Porous Silicon Nitride Surface

2013 ◽  
Vol 537 ◽  
pp. 20-23
Author(s):  
Qi Hong Wei ◽  
Chong Hai Wang ◽  
Ling Li ◽  
Hong Sheng Wang ◽  
Jian Liu ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Silicon Nitride ◽  
Porous Silicon ◽  
Water Absorption ◽  
Bending Strength ◽  
Sol Gel ◽  
Universal Testing ◽  
Before And After ◽  
Scanning Electron ◽  
Sealing Coating

Hole-sealing coating was fabricated on the porous silicon nitridesubstrate by sol-gel method, with Li2O-Al2O3-SiO2 as the basic materials and other additives were added. The morphology of the coating was tested by scanning electron microscope(SEM). The density,water absorption and porosity of porous silicon nitride before and after coating were tested by Archimedes method.The bending strength was tested by universal testing machine．The results indicated that the water absorption of porous silicon nitride was decreaced by 93.73% to 96.74%, the bending strength of porous silicon nitride was increaced by 8.21％ to 15.56％.

The Effect of Normal Pressure Air Plasma Treatment on the Hydrophilicity of PPS Fiber

2011 ◽  
Vol 332-334 ◽  
pp. 820-823
Author(s):  
Xue Ping Guo ◽  
Rui Ping Zhang ◽  
Peng Wei Xiang
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Water Absorption ◽  
Plasma Treatment ◽  
Breaking Strength ◽  
Great Influence ◽  
Normal Pressure ◽  
Air Plasma ◽  
Air Plasma Treatment ◽  
Scanning Electron

Because of the hydrophobicity of PPS fiber,we used normal pressure air plasma treatment on PPS fiber with the rusult that the PPS fiber was modied and its hydrophilicity was improved effectively.The surface of PPS fiber was etched under the scanning electron microscope (SEM), observation. With the power and the time increasing, the water absorption of PPS fiber increased first and then decreased. However, to the breaking strength of PPS fiber, it was declined basically with the power increasing. Also, it had no great influence for the lasting of time.

The Preparation of Red Mud Lightweight Ceramsite

2013 ◽  
Vol 648 ◽  
pp. 96-99 ◽  
Author(s):  
Long Ma ◽  
Guo Zhong Li
Keyword(s):  
Compressive Strength ◽  
Electron Microscope ◽  
Fly Ash ◽  
Scanning Electron Microscope ◽  
Water Absorption ◽  
Bulk Density ◽  
Red Mud ◽  
Roasting Process ◽  
Microscopic Morphology ◽  
Scanning Electron

The red mud lightweight ceramsite was made by using red mud, fly ash and bentonite, mixed with a certain amount of pore-forming agent and foam stabilizer, through the roasting process. Influence of pore-forming agent on red mud ceramsite was studied. The microscopic morphology of red mud lightweight ceramsite damage fracture was analyzed by using scanning electron microscope. The results show that with 6% pore-forming agent, the apparent density is 731kg/m3, the bulk density is 547kg/m3; the cylinder compressive strength is 3.3Mpa, the water absorption is 9.7%.

scholarly journals Pembuatan dan Karakterisasi Plastik Biodegradable dari Umbi Talas (Xanthosoma sagittifolium) dengan Penambahan Filler Kitosan dan Kalsium Silikat

2019 ◽  
Vol 3 (1) ◽  
pp. 10
Author(s):  
S. Sigit Udjiana ◽  
Sigit Hadiantoro ◽  
Muchammad Syarwani ◽  
Profiyanti Hermien Suharti
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Water Absorption ◽  
Calcium Silicate ◽  
Plastic Waste ◽  
Biodegradable Plastic ◽  
Main Ingredient ◽  
Casting Method ◽  
Xanthosoma Sagittifolium ◽  
Scanning Electron

Permasalahan tentang sampah plastik di Indonesia berdampak pada ketidakstabilan ekosistem lingkungan dan peningkatan pencemaran lingkungan. Hal ini dikarenakan sampah plastik tidak dapat terurai oleh mikroorganisme di dalam tanah. Inovasi untuk mengatasi masalah ini terus dilakukan, salah satunya adalah pengembangan plastik biodegradable. Plastik biodegradable dalam penelitian ini dikembangkan dengan pati umbi talas sebagai bahan utama, sorbitol sebagai plasticizer serta kitosan dan kalsium silikat sebagai filler. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan filler kitosan dan kalsium silikat terhadap sifat mekanik, kemampuan biodegradasi, maupun water absorption. Selain itu, juga dilakukan analisa Scanning Electron Microscope (SEM) untuk mengetahui morfologi dari plastik biodegradable. Variabel berubah yang digunakan dalam penelitian ini adalah 2%,4%,6% dan 8% dari berat pati yang digunakan. Plastik biodegradable dibuat menggunakan metode casting, di mana pati didispersikan ke dalam campuran air dan plasticizer. Hasil percobaan menunjukkan bahwa kemampuan degradasi paling tinggi sebesar 42,86% untuk plastik biodegradable dengan filler kalsium silikat 6%. Sedang hasil uji water absorption menunjukkan nilai terendah 11,76% dengan filler kitosan 8%. Uji kuat tarik diperoleh nilai paling besar 9,56 MPa pada filler kalsium silikat 6%.Plastic waste in Indonesia became a national problematic that has an impact on the instability of environmental ecosystems and increased environmental pollution. This happens because plastic waste cannot be decomposed by microorganisms in the soil. Innovation has been carried out continuously to overcome this problem. the development of biodegradable plastic became one solution to this problem. Biodegradable plastic in this study was developed with taro tuber starch as the main ingredient, sorbitol as plasticizer and chitosan and calcium silicate as filler. The objective of this study was to determine the effect of the addition of chitosan and calcium acetate as fillers on mechanical properties, biodegradability, and water absorption. Scanning Electron Microscope (SEM) was also analyzed in this study to determine the morphology of biodegradable plastic. The variables used in this study were the amount of fillers as much as 2%, 4%, 6%, and 8% of the weight of the starch used. Biodegradable plastic has been made using the casting method, in which starch is dispersed into a mixture of water and plasticizer. The results showed that the highest biodegradation ability was 42.86% for biodegradable plastic with 6% calcium silicate filler. While the water absorption results showed the lowest value of 11.76% for biodegradable plastic with 8% chitosan filler. Tensile strength test obtained the highest value of 9.56 MPa for biodegradable plastic with 6% calcium silicate filler.

Concrete Made with Alternative Fine Aggregates: The Reuse of Porcelain Electrical Insulators

2018 ◽  
Vol 912 ◽  
pp. 185-190
Author(s):  
Marco Antonio Campos ◽  
Vladimir Antonio Paulon ◽  
André Munhoz de Argollo Ferrão
Keyword(s):  
Mechanical Properties ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Ceramic Waste ◽  
Fine Aggregates ◽  
Alternative Materials ◽  
Microscope Images ◽  
Porcelain Insulators ◽  
Physical And Chemical ◽  
Scanning Electron

The use of alternative materials as substitutes for ordinary aggregates, mainly in concrete and mortar, has been common in recent decades in Brazil. Due to its physical and chemical similarities to common aggregates, ceramic waste, when coupled with a granulometric control, is suitable for use as an aggregate in concrete. Brazil has been estimated to dispose of approximately 25,000 tons of porcelain insulators annually, which are insulators that are often discarded along with other debris and harm the environment. This study examined the grinding methodology for and subsequent use of porcelain to replace fine aggregates in concrete and verified the improvement this substitution provided by evaluating the mechanical properties and durability of the concrete under study and examining scanning electron microscope images.

scholarly journals Fracture and Embedment Behavior of Brittle Submicrometer Spherical Particles Fabricated by Pulsed Laser Melting in Liquid Using a Scanning Electron Microscope Nanoindenter

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2201
Author(s):  
Daizen Nakamura ◽  
Naoto Koshizaki ◽  
Nobuyuki Shishido ◽  
Shoji Kamiya ◽  
Yoshie Ishikawa
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Density Functional ◽  
Bending Strength ◽  
Pulsed Laser ◽  
Spherical Shape ◽  
Spherical Particles ◽  
Laser Melting ◽  
Load Displacement ◽  
Scanning Electron

Generally, hard ceramic carbide particles, such as B4C and TiC, are angulated, and particle size control below the micrometer scale is difficult owing to their hardness. However, submicrometer particles (SMPs) with spherical shape can be experimentally fabricated, even for hard carbides, via instantaneous pulsed laser heating of raw particles dispersed in a liquid (pulsed laser melting in liquid). The spherical shape of the particles is important for mechanical applications as it can directly transfer the mechanical force without any loss from one side to the other. To evaluate the potential of such particles for mechanical applications, SMPs were compressed on various substrates using a diamond tip in a scanning electron microscope. The mechanical behaviors of SMPs were then examined from the obtained load–displacement curves. Particles were fractured on hard substrates, such as SiC, and fracture strength was estimated to be in the GPa range, which is larger than their corresponding bulk bending strength and is 10–40% of their ideal strength, as calculated using the density-functional theory. Contrarily, particles can be embedded into soft substrates, such as Si and Al, and the local hardness of the substrate can be estimated from the load–displacement curves as a nanoscale Brinell hardness measurement.

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