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 Pengaruh Penambahan Abu Sekam Padi Terhadap Sifat Fisis dan Mekanis pada Mortar

2020 ◽  
Vol 8 (1) ◽  
pp. 111-118
Author(s):  
Ahmad Munawir Siregar ◽  
◽  
Roniyus Marjunus ◽  
Simon Sembiring ◽  
◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Rice Husk ◽  
Elasticity Modulus ◽  
Rice Husk Ash ◽  
Physical And Mechanical Properties ◽  
Modulus Of Rupture ◽  
National Standard ◽  
X Ray ◽  
Microstructure Morphology

The research was carried out about the effect of adding rice husk ash to physical and mechanical properties of mortar. Mortar was moulded with three composition comparisons between ordinary portland cement, rice husk ash, and rice stalk fiber. Rice husk ash was burned at temperature of 700 OC for 2 hours, rice stalk fiber was mechanically sliced up to 0.8 mm in size, then mortar molding and maintenance was processed for 28 days. The mortars that had reached the age of 28 days were tested according to the Indonesia National Standard (SNI) including physical properties (water absorption, density), and mechanical properties (compressive strength, modulus of elasticity, modulus of rupture). Characterization of microstructure, morphology and counting all elements on the surface of mortar were processed by using Scanning Electron Microscopy - Energy Dispersive X-ray Spectroscopy (SEM-EDS). The results of research that had been carried out, mortar with the most optimum physical and mechanical properties was mortar B with a composition of 65%: 10%: 25%. The results of the characterization using SEM-EDS showed that the surface of mortar B was better with grain diameter (1.4 ± 0.9) µm and the most dominant element in the mortar was element of Ca and Si which functioned as mortar binder and hardener.

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