Study on Influence Factors of Fly Ash and Metakaolin Based Geopolymer

2012 ◽  
Vol 538-541 ◽  
pp. 2322-2328 ◽  
Author(s):  
Jing Zhong Kuang ◽  
Xiang Chuan Zhao ◽  
Fang Shi ◽  
Hai Ying Cao
Keyword(s):  
Fly Ash ◽  
Liquid Phase ◽  
Sodium Silicate ◽  
Influence Factors ◽  
Solution Concentration ◽  
Organic Polymer ◽  
Liquid Ratio ◽  
Naoh Solution ◽  
Solid Liquid ◽  
Orthogonal Tests

Gepolymeric material is a new building material, which not only has the characteristics of organic polymer, ceramic and cement but also unique properties. The effects of four factors on the strength of fly ash and metakaolin based geopolymer were discussed with the orthogonal tests in this study, including fly ash content, NaOH solution concentration, solid-liquid ratio and the content of sodium silicate in the liquid phase. The results show that: content of fly ash 30%, NaOH solution concentration 12mol/L, solid-to-liquid ratio 4.5 and the content of sodium silicate in the liquid phase 65% is the best condition preparation of fly ash and metakaolin based geopolymer.

Effect of Fly Ash/Alkaline Activator Ratio and Sodium Silicate/NaOH Ratio on Fly Ash Geopolymer Coating Strength

2013 ◽  
Vol 594-595 ◽  
pp. 146-150 ◽  
Author(s):  
J. Liyana ◽  
Abdullah Mohd Mustafa Al Bakri ◽  
Kamarudin Hussin ◽  
C.M. Ruzaidi ◽  
A. Rashid Azura
Keyword(s):  
Fly Ash ◽  
Flexural Strength ◽  
Sodium Silicate ◽  
Sintering Temperature ◽  
Coating Material ◽  
Liquid Ratio ◽  
Alkali Activator ◽  
Alkaline Activator ◽  
Solid Liquid ◽  
Exposure Conditions

Fly ash geopolymer coating material potential used to protect surface used in exposure conditions. Ratio of fly ash/alkaline activator and Na2SiO3/NaOH play important parameter on determining the best flexural strength of geopolymer coating material. Fly ash and alkali activator (Al2O3/Na2SiO3) were mixed with the solids-to-liquid ratios in range of 1.0-3.0 and different ratios of Na2SiO3/NaOH (1.0-3.0) to prepare geopolymer coating material at constant NaOH concentration of 10 M. Effect of fly ash/alkaline activator ratio and Na2SiO3/NaOH on geopolymer coating was determined with respect to the highest flexural strength of the 1200oC sintering temperature of geopolymer coating substrates. The results concluded that the highest strength for fly ash geopolymer coating material is achieved 42 MPa when the solid/liquid ratio is 2.0 and the Na2SiO3/NaOH ratio is 2.5.

Study on the Preparation of Activated Carbons with Baijiu Vinasse

2013 ◽  
Vol 448-453 ◽  
pp. 669-673
Author(s):  
Ling Lin Chen ◽  
Hua Zhao
Keyword(s):  
Activated Carbons ◽  
Retention Rate ◽  
Chemical Activation ◽  
Solution Concentration ◽  
Optimum Conditions ◽  
Liquid Ratio ◽  
Protein Retention ◽  
Surface Method ◽  
Naoh Solution ◽  
Solid Liquid

Activated carbons were prepared with Baijiu vinasse in this study. The response surface method was used to optimize the process parameters of NaOH solution boiling treatment to extract the protein in Baijiu vinasse. Ascertaining the optimum conditions that NaOH solution concentration is 2.5mol/L, treating time is 2hours and solid-liquid ratio is 1:4. So the protein retention rate is 1.116%.The methods of ZnCl2 chemical activation and high temperature calcination activation were used to prepare activated carbons. Under the optimum conditions of ZnCl2 concentration 50%, solid-liquid ratio 1:2, calcination time 120min, calcination temperature 600°C, the methylene blue adsorption reaches to 208mg/g.

The Influence Factors of Compressive Strength and Production of Mineral Polymer of Aluminum Rocks in Xiuwen County, Guizhou Province, China

2013 ◽  
Vol 690-693 ◽  
pp. 1086-1090
Author(s):  
Jie Zhang ◽  
Qiong Qiong Li ◽  
Yu Qiang Xiong
Keyword(s):  
Compressive Strength ◽  
Water Glass ◽  
Mineral Water ◽  
Raw Materials ◽  
Influence Factors ◽  
Polymer Materials ◽  
Guizhou Province ◽  
Liquid Ratio ◽  
Alkaline Activator ◽  
Solid Liquid

Aluminous rocks from Xiuwen County, Guizhou are the main raw materials, mixed some kaolin mineral. Water glass and alkaline activators are used to product polymer materials, the main experimental indicators are the compressive strength. Here, the studies on amount of water glass and alkaline activator, solid-liquid ratio, amount of kaolin and effects on compressive strength of Geopolymer have been proceeded respectively. The result shows that: the highest compressive strength of geopolymers is17.94 Mpa, with aluminous rock 40g, solid-liquid ratio 2.2, water glass12g and alkali activator 2.01g, as well as kaolin 18.02g.

scholarly journals Effect of Alkaline Concentration and Solid Liquid Ratio on the Acid Resistance of Fly Ash Based Geopolymer Mortar

2019 ◽  
Vol 4 (4) ◽  
pp. 80
Author(s):  
Abel W. Ourgessa ◽  
Amen Aniley ◽  
Ababo G. Gudisa ◽  
Ibsa Neme ◽  
Alemshet Bekele
Keyword(s):  
Fly Ash ◽  
Acid Resistance ◽  
Liquid Ratio ◽  
Solid Liquid

The Preparation of Ferronickel Powder from Nickel-Contained Sodium Jarosite Residue

2011 ◽  
Vol 396-398 ◽  
pp. 536-542
Author(s):  
Rui Ren ◽  
Shu Ping Zheng ◽  
Qian Zhang
Keyword(s):  
Hydrogen Reduction ◽  
Reduction Process ◽  
Decomposition Temperature ◽  
Reduction Temperature ◽  
Liquid Ratio ◽  
Percent Reduction ◽  
Alkaline Decomposition ◽  
Reduced Products ◽  
Naoh Solution ◽  
Solid Liquid

nickel and iron was recovered as ferronickel from sodium jarosite residue containing nickel, the processes include alkaline decomposing residue, hydrogen reducing precipitations produced in alkaline decomposition process and magnetic separating reduced precipitations. The effects of alkaline decomposition temperature, the concentration of NaOH solution and solid/liquid ratio on the process of alkaline decomposing residue were examined. Meanwhile, the influence of hydrogen reduction temperature on the reduced products was studied, too. The results shown the natrojarosite in residue can be near completely decomposed to form hydroxide precipitations in the process of alkaline decomposition. In the process of hydrogen reduction, the rise of reduction temperature can increase the percent reduction for both nickel and iron in reduced results. But it is easier to reduce nickel than to reduce iron at the range of 750°C-950°C. When hydrogen reduction temperature was 950 °C, the percent reduction for nickel and iron in hydrogen reduction process was 95.81% and 94.4%, respectively. XRD tests indicated, except for ferronickel, there were still some impurities such as barium sulfate and barium oxide in reduced product. SEM test indicated the particles of precipitations will become fused together during hydrogen reduction process, so it is difficult to magnetic separate ferronickel purely from reduced results. The content of nickel and iron in magnetic separating product was only 11.64% and 62.40%.

Adhesiveness of Kaolin Based Coating Material on Lumber Wood

2016 ◽  
Vol 673 ◽  
pp. 47-54 ◽  
Author(s):  
Shamala Ramasamy ◽  
Kamarudin Hussin ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Che Mohd Ruzaidi Ghazali ◽  
Andrei Victor Sandu ◽  
...  
Keyword(s):  
Sodium Chloride ◽  
Sodium Silicate ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Source Material ◽  
Wood Substrate ◽  
Liquid Ratio ◽  
Morphological Studies ◽  
Alkaline Activator ◽  
Solid Liquid

Kaolin, widely used aluminosilicate source material was added with alkaline activator solution, creating geopolymer coating paste.Optimum design for kaolin based coating using geopolymer technology was studied. The work was to analyses the effect of solid liquid ratio, sodium silicate and sodium chloride ratio and sodium chloride molarity on its adhesive performances on lumber wood substrate. Upon observation, coating with 0.9 solid/liquid ratio, 0.45 sodium silicate/sodium chloride ratio and sodium chloride solution with 6M molarity shows promising adhesive strength. These results were further evident with morphological studies.

Effects of sodium hydroxide (NaOH) solution concentration on fly ash-based lightweight geopolymer

2017 ◽  
Author(s):  
W. M. W. Ibrahim ◽  
K. Hussin ◽  
M. M. A. Abdullah ◽  
A. A. Kadir ◽  
L. M. Deraman
Keyword(s):  
Fly Ash ◽  
Sodium Hydroxide ◽  
Solution Concentration ◽  
Naoh Solution

The Effect of Solid-to-Liquid Ratio and Temperature on Mechanical Properties of Kaolin Geopolymer Ceramics

2015 ◽  
Vol 660 ◽  
pp. 23-27 ◽  
Author(s):  
Romisuhani Ahmad ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Kamarudin Hussin ◽  
Andrei Victor Sandu ◽  
Mohammed Binhussain ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Flexural Strength ◽  
Relative Density ◽  
Sodium Silicate ◽  
Sintered Sample ◽  
Liquid Ratio ◽  
Naoh Solution ◽  
Sample Range ◽  
Alkaline Activator

The effect of solid-to-liquid ratio and temperature on the mechanical properties of kaolin geopolymer ceramics are studied. Kaolin and alkaline activator were mixed with the solid-to-liquid ratio in the range of 0.8-1.2. Alkaline activator was formed by mixing the 12 M NaOH solution with sodium silicate at a ratio of 0.24. Kaolin geopolymer ceramic have been produced by using powder metallurgy (PM) technique. The samples were heated at different temperature started from 900 °C until 1200 °C and the strength were tested. The relative density and flexural strength of sintered sample range approximately 84%-95% and 20-90 MPa respectively. The result revealed that the optimum flexural strength was obtained at solid-to-liquid ratio of 1.0 and the samples heated at 1200 °C achieved the highest flexural strength (90 MPa).

Effect of Solid to Liquid Ratio on the Mechanical and Physical Properties of Fly Ash Geopolymer without Sodium Silicate

2014 ◽  
Vol 625 ◽  
pp. 46-49 ◽  
Author(s):  
Rosniza Hanim Abdul Rahim ◽  
Khairun Azizi Azizli ◽  
Zakaria Man ◽  
Tia Rahmiati ◽  
Lukman Ismail
Keyword(s):  
Mechanical Property ◽  
Compressive Strength ◽  
Fly Ash ◽  
Physical Properties ◽  
Silicate Solution ◽  
Strength Development ◽  
Alkali Activation ◽  
Liquid Ratio ◽  
Mechanical And Physical Properties ◽  
Solid Liquid

Geopolymer is produced from the alkali activation of materials rich in Si and Al with addition of silicate solution in order to improve the mechanical property. Limited research has been done with the absence of silicate solution in the geopolymerization process by varying solid/liquid ratio and on how it works for that condition on mechanical and physical properties. This paper presents an investigation on the mechanical and physical properties of fly ash based geopolymer by varying solid to liquid ratio using sodium hydroxide as the only activator. In addition, the strength development also been investigated. The samples were prepared using 50mm x 50mm x 50mm mould and cured at an elevated temperature (60oC). It can be observed that the optimum compressive strength and density were obtained at solid/ liquid ratio of 4. In addition, the compressive strength of fly ash based geopolymer for all the solid to liquid ratio increased until 14 days and started to decrease later.

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