scholarly journals Preparation of glass–ceramic materials from coal ash and rice husk ash: Microstructural, physical and mechanical properties

2020 ◽  
Author(s):  
Julián Dávalos ◽  
Ashley Bonilla ◽  
Mónica A. Villaquirán-Caicedo ◽  
Ruby M. de Gutiérrez ◽  
Jesús Ma. Rincón
Keyword(s):  
Mechanical Properties ◽  
Rice Husk ◽  
Glass Ceramic ◽  
Rice Husk Ash ◽  
Coal Ash ◽  
Physical And Mechanical Properties ◽  
Ceramic Materials ◽  
Glass Ceramic Materials

Effect of Sintering Temperature on the Preparation and Characterization of Green Glass Ceramic from Rice Husk Ash as a Matrix

2020 ◽  
Vol 1010 ◽  
pp. 211-215
Author(s):  
Shahrizam Saad ◽  
Abdullah Chik ◽  
Khairel Rafezi Ahmad ◽  
Sharifah Shahnaz Syed Bakar
Keyword(s):  
Mechanical Properties ◽  
Rice Husk ◽  
Glass Ceramic ◽  
Rice Husk Ash ◽  
Volume Fraction ◽  
Sintering Temperature ◽  
Physical And Mechanical Properties ◽  
Hardness Test ◽  
Constant Composition ◽  
Green Glass

Powder metallurgy technique were proved successful net-shape technology which suitable for the production of green glass ceramic (GGC) from rice husk ash (RHA) and characterized by good physical and mechanical properties of glass ceramic. In this research, the glass sample was formed by mixing varying percentage of weight of silica, flux and additives. The aim of this work is to study the effect of the sintering temperature to the physical and mechanical properties of GGC. The samples were mixed in different volume fraction of additives which is 5%, 10% and 15% in constant composition of RHA and flux. The mixture was consolidated into rigid die compaction at 300MPa, then sintered at 450, 550 and 750°C. Vickers hardness test were investigated. The glass composite were then characterize by scanning electron microscopy (SEM). The GGC with 10% additives at sintering temperature 550°C shows highest hardness strength which is about 213.0 HV.

scholarly journals Application of the final flotation waste for obtaining the glass-ceramic materials

2017 ◽  
Vol 49 (4) ◽  
pp. 431-443
Author(s):  
Mira Cocic ◽  
Mihovil Logar ◽  
Suzana Eric ◽  
Visa Tasic ◽  
Snezana Devic ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Glass Ceramic ◽  
Construction Materials ◽  
Glass Ceramics ◽  
Propagation Speed ◽  
Ceramic Materials ◽  
Time Duration ◽  
Good Thermal Stability ◽  
Glass Ceramic Materials ◽  
Main Component

This work describes the investigation of the final flotation waste (FFW), originating from the RTB Bor Company (Serbia), as the main component for the production of glass-ceramic materials. The glass-ceramics was synthesized by the sintering of FFW, mixtures of FFW with basalt (10%, 20%, and 40%), and mixtures of FFW with tuff (20% and 40%). The sintering was conducted at the different temperatures and with the different time duration in order to find the optimal composition and conditions for crystallization. The increase of temperature, from 1100 to 1480?C, and sintering time, from 4 to 6h resulted in a higher content of hematite crystal in the obtained glass-ceramic (up to 44%). The glass-ceramics sintered from pure FFW (1080?C/36h) has good mechanical properties, such as high propagation speed (4500 m/s) and hardness (10800 MPa), as well as very good thermal stability. The glass-ceramics obtained from mixtures shows weaker mechanical properties compared to that obtained from pure FFW. The mixtures of FFW with tuff have a significantly lower bulk density compared to other obtained glass-ceramics. Our results indicate that FFW can be applied as a basis for obtaining the construction materials.

scholarly journals Influence of Rice Husk Ash on the Properties of Concrete

2016 ◽  
Vol 9 (1) ◽  
pp. 29-33
Author(s):  
MB Hossain ◽  
KM Shaad ◽  
MS Rahman ◽  
P Bhowmik
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Lightweight Concrete ◽  
Physical And Mechanical Properties ◽  
Test Results ◽  
Structural Concrete ◽  
Conventional Concrete

This research was carried out to investigate various physical properties of Rice Husk Ash (RHA) and, some physical and mechanical properties of concrete incorporating RHA in different proportions. The concrete specimens were tested at 7, 21 and 28 days after curing. Test results revealed that the specific gravity of RHA was found lower than that of sand. The density of concrete containing RHA was recorded between 80-110 lb.ft-3, which is lower than conventional concrete. Water absorption was found increasing with the increase of RHA content in concrete specimens. There were significant variations in compressive strength values of concrete containing 5%, 10% and 20% volume of RHA. The compressive strength of 5% RHA specimen was 150-200% higher than that of other specimens. Hence, upto 5% replacement of RHA could be recommended for making normal lightweight concrete. The splitting tensile strength was about 9-10% of compressive strength. It was concluded that upto 5% RHA can be used effectively in making normal lightweight concrete. The higher percentage of RHA could be used in making non-structural concrete where the strength of concrete is not concerned.J. Environ. Sci. & Natural Resources, 9(1): 29-33 2016

Influence of Temperature on the Substitution of Quartz by Rice Husk Ash (RHA) in Porcelain Composition

2013 ◽  
Vol 465-466 ◽  
pp. 1297-1303 ◽  
Author(s):  
Hassan Usman Jamo ◽  
Mohamad Zaky Noh ◽  
Zainal Arifin Ahmad
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Rice Husk ◽  
Glassy Phase ◽  
Rice Husk Ash ◽  
Physical And Mechanical Properties ◽  
Agricultural Industry ◽  
Influence Of Temperature ◽  
Influence Of Temperature On

Rice Husk Ash (RHA) is a by-product of the agricultural industry which contains high amount of silica. Active silica from RHA has been used progressively to substitute quartz in a porcelain composition and the effect this substitution in relation to temperature on physical and mechanical properties has been investigated. It was found that progressive substitution of RHA in a porcelain composition resulted in early vitrification of the mixture. The compressive strength was highest and the porosity was the least at a temperature of 1200°C on 20wt% substitution of RHA. The improvement in the properties could be attributed to sharp changes in the microstructural features as a result of increase in mullite and glassy phase simultaneously. Hence the extension of study on microstructure and morphology has influence on the physical and mechanical properties.

scholarly journals Studies on the durability of wood-cement particleboards produced with residues of Pinus spp., silica fume, and rice husk ash

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 3064-3086
Author(s):  
Adauto José Miranda de Lima ◽  
Setsuo Iwakiri ◽  
Kestur G. Satyanarayana ◽  
María Guadalupe Lomelí-Ramírez
Keyword(s):  
Mechanical Properties ◽  
Silica Fume ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Physical And Mechanical Properties ◽  
Significant Loss ◽  
Natural Weathering ◽  
Accelerated Weathering ◽  
Cement Particle ◽  
Pinus Spp

Wood-cement composites were considered as substitutes for wood or asbestos cement. This research is focused on the development, characterization, and durability of different wood-cement particle boards composed of wood waste [residual particles of pine species (Pinus spp.)], with silica fume or rice husk ash. The wood-cement panels produced by cold compression were evaluated for their physical and mechanical properties after accelerated and natural weathering for 28 and 91 days of curing, respectively. Results indicate that the performance of wood-cement panels containing the Pinus spp. residue was comparable to that of lignocellulosic aggregate in wood cement panels. Pine residue wood panels exhibited high levels of pozzolanic activity, suggesting that silica fume or rice husk ash could be used as a partial substitute in Portland cement. There was a significant loss of mechanical properties over time with both the reference panel and the panel produced with pozzolana. Although there was no direct correlation between the values of accelerated weathering tests and natural weathering tests, there was a larger degradation of the panels after 20 cycles of the accelerated weathering than that after 12 months of natural weathering. Morphology studies supported the observed results.

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