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.

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.

Effect of Ultra High Molecular Weight Polyethylene (UHMWPE) as Binder and Sintering Temperature in Kaolin Geopolymer Ceramics on Flexural Strength

2016 ◽  
Vol 857 ◽  
pp. 412-415
Author(s):  
Romisuhani Ahmad ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Kamarudin Hussin ◽  
Andrei Victor Sandu ◽  
Mohammed Binhussain ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Powder Metallurgy ◽  
Flexural Strength ◽  
High Molecular Weight ◽  
Sintering Temperature ◽  
Powder Metallurgy Method ◽  
Liquid Ratio ◽  
Naoh Solution ◽  
Alkaline Activator ◽  
Ultra High Molecular Weight

This paper present the flexural strength of kaolin geopolymer ceramics with addition of ultra-high molecular weight polyethylene (UHMWPE) as a binder. The effect of varying UHMWPE loading and different sintering temperature on kaolin geopolymer ceramics were evaluated. Kaolin and alkaline activator were mixed with the solid-to-liquid ratio of 1.0. Alkaline activator was formed by mixing the 8 M NaOH solution with sodium silicate at a ratio of 0.24. Addition of UHMWPE to the kaolin geopolymer ceramics are fabricated with UHMWPE loadings of 2, 4, 6 and 8 (wt. %) by using powder metallurgy method. The samples were heated at different temperature started from 900 °C until 1200 °C and the strength were tested. It was found that the flexural strength for the kaolin geopolymer ceramics with addition of UHMWPE were higher and generally increased with the increasing of UHMWPE loading. Similar trend was observed for the effect of sintering temperature. The result revealed that the optimum flexural strength was obtained at UHMWPE loading of 8 wt. % and the samples heated at 1200 °C achieved the highest flexural strength (49.15 MPa).

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.

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).

scholarly journals OPTIMASI RASIO Si/Al, RASIO PADATAN/CAIRAN, KONSENTRASI NaOH DAN JENIS AGREGAT DALAM SINTESA BETON GEOPOLIMER DENGAN METODE TAGUCHI

2018 ◽  
Vol 2 (1) ◽  
pp. 26
Author(s):  
Ufafa Anggarini
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Taguchi Method ◽  
Room Temperature ◽  
Sol Gel ◽  
Experimental Result ◽  
Liquid Ratio ◽  
Alkaline Activator ◽  
Solid Liquid

The optimization synthezised of geopolymer based on fly ash materials have been done by using Taguchi method. The experimental design was done with 4 factors and 3 levels, that were the influence of Si/Al ratio, solid/liquid ratio, NaOH and the type of aggregate. Geopolymers were synthesized by sol gel method at room temperature, using fly ash as aluminasilica source and alkaline activator solutions thain consist of NaOH and Na2SiO3. The influence of Si/Al ratio studied at level of 4.00, 4.25, 4,50, solid/liquid ratio at level of 1.50, 2.33, 4.00. NaOH (%wt/%v) of 0.24, 0.40, 0.56, and the type of aggregate of Malang sand, Bojonegoro sand and granite. Based on SNR analysis and the characterization determination of higher is better, the geopolymer optimum composition was Si/Al factor at level of 3 (4.50), solid/liquid ratio level at 2 (2.33), NaOH level at 1 (0.24) and type of aggregate level at 3 (granite). The calculation of compressive strength prediction was determined at 21.01 Mpa, while the optimum compressive strength of the experimental result was found at 21 Mpa. Keywords: Geopolymer, Taguchi Method, Si/Al, Solid/Liquid, NaOH, Type of agreggate

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.

Correlation between Na2SiO3/NaOH and NaOH Molarity to Flexural Strength of Geopolymer Ceramic

2015 ◽  
Vol 754-755 ◽  
pp. 152-156 ◽  
Author(s):  
Nur Ain Jaya ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Che Mohd Ruzaidi Ghazali ◽  
M. Binhussain ◽  
Kamarudin Hussin ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Flexural Strength ◽  
Sodium Hydroxide ◽  
Sodium Silicate ◽  
Alkali Activation ◽  
M 12 ◽  
Alkaline Activator

Clay based geopolymer ceramic were produced through the geopolymerisation process by the alkali activation of kaolin with an activator solution which is mixture of sodium silicate and sodium hydroxide and undergoes heating at elevated temperature. The concentration of NaOH used in this study was in the range of 6 M-12 M. The ratio of kaolin to alkaline activator used is 1.0. Three different ratios of Na2SiO3/NaOH of 0.16, 0.24 and 0.32 were used to investigate the optimum flexural strength. The samples were cured at 80 °C for 24 hours and sintered at temperatures ranging from 900 °C-1200 °C. The optimum flexural strength of 86.833 MPa is obtained when the ratios of Na2SiO3/NaOH is 0.24 with the NaOH concentration of 12M at 1200 °C.

scholarly journals Effect of Fly Ash on the Properties of Ceramics Prepared from Steel Slag

2018 ◽  
Vol 8 (7) ◽  
pp. 1187 ◽  
Author(s):  
Yanbing Zong ◽  
Xuedong Zhang ◽  
Emile Mukiza ◽  
Xiaoxiong Xu ◽  
Fei Li
Keyword(s):  
Fly Ash ◽  
Flexural Strength ◽  
Water Absorption ◽  
Sintering Temperature ◽  
Steel Slag ◽  
Diffraction Peak ◽  
National Standard ◽  
Sintered Ceramic ◽  
Base Steel ◽  
Sintering Shrinkage

In this study, SiO2–Al2O3–CaO–MgO steel slag ceramics containing 5 wt % MgO were used for the preparation of ceramic bodies, with the replacement of 5–20 wt % quartz and feldspar by fly ash. The effect of the addition of fly ash on the sintering shrinkage, water absorption, sintering range, and flexural strength of the steel slag ceramic was studied. Furthermore, the crystalline phase transitions and microstructures of the sintered samples were investigated by XRD, Fourier transform infrared (FTIR), and SEM. The results showed that the addition of fly ash affected the crystalline phases of the sintered ceramic samples. The main crystal phases of the base steel slag ceramic sample without fly ash were quartz, diopside, and augite. With increasing fly ash content, the quartz diffraction peak decreased gradually, while the diffraction peak intensity of anorthite became stronger. The mechanical properties of the samples decreased with the increasing amount of fly ash. The addition of fly ash (0–20 wt %) affected the optimum sintering temperature (1130–1160 °C) and widened the sintering range. The maximum addition amount of fly ash should be 15 wt %, for which the optimum sintering temperature was 1145 °C, water absorption was 0.03%, and flexural strength was 43.37 MPa higher than the Chinese national standard GBT 4100-2015 requirements.

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 Effect of Curing Time on the Properties of Fly Ash-Based Geopolymer Bricks

2012 ◽  
Vol 626 ◽  
pp. 937-941 ◽  
Author(s):  
W.I. Wan Mastura ◽  
H. Kamarudin ◽  
I. Khairul Nizar ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
H. Mohammed
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Water Absorption ◽  
Sodium Hydroxide ◽  
Sodium Silicate ◽  
Experimental Work ◽  
Base Material ◽  
Curing Time ◽  
Curing Conditions ◽  
Alkaline Activator

This paper reports the results of an experimental work conducted to investigate the effect of curing conditions on the properties of fly ash-based geopolymer bricks prepared by using fly ash as base material and combination of sodium hydroxide and sodium silicate as alkaline activator. The experiments were conducted by varying the curing time in the range of 1-24 hours respectively. The specimens cured for a period of 24 hours have presented the highest compressive strength for all ratio of fly ash to sand. For increasing curing time improve compressive strength and decreasing water absorption.

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