Effect of Solid/Liquid Ratio during Curing Time Fly Ash Based Geopolymer on Mechanical Property

2014 ◽  
Vol 803 ◽  
pp. 120-124 ◽  
Author(s):  
Tia Rahmiati ◽  
Khairun Azizi Azizli ◽  
Zakaria Man ◽  
Lukman Ismail ◽  
Mohd Fadhil Nuruddin
Keyword(s):  
Mechanical Property ◽  
Compressive Strength ◽  
Fly Ash ◽  
Setting Time ◽  
Alkali Activation ◽  
Good Mechanical Property ◽  
Curing Time ◽  
Liquid Ratio ◽  
Characterization Result ◽  
Solid Liquid

Geopolymer is produced from the alkali activation of materials rich in Si and Al such as fly ash. Based on the experimental and characterization result, solid to liquid ratio influenced the setting time and compressive strength of geopolymer in order to have good mechanical property. The optimum setting time and compressive strength were obtained at 3 : 1 solid to liquid ratio. Optimum curing time reach at 14 days.

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.

The effect of Solid/Liquid ratio on setting time, workability and compressive strength of fly ash based geopolymers

2018 ◽  
Vol 5 (14) ◽  
pp. 27441-27445
Author(s):  
N. Nikoloutsopoulos ◽  
A. Sotiropoulou ◽  
G. Kakali ◽  
S. Tsivilis
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Setting Time ◽  
Liquid Ratio ◽  
Solid Liquid

The Effect of KOH Concentration on Setting Time and Compressive Strength of Fly Ash-Based Geopolymer

2014 ◽  
Vol 625 ◽  
pp. 94-97 ◽  
Author(s):  
Tia Rahmiati ◽  
Khairun Azizi Azizli ◽  
Zakaria Man ◽  
Lukman Ismail ◽  
Mohd Fadhil Nuruddin
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Fly Ash ◽  
Sodium Hydroxide ◽  
Setting Time ◽  
Alkali Activation ◽  
High Concentration ◽  
Low Concentration ◽  
Optimum Result ◽  
Alkaline Activator

Geopolymer is produced from the alkali activation of materials rich in Si and Al such as fly ash. Sodium hydroxide (NaOH) with high concentration is normally used in geopolymerization. Limited research has been done with low concentration of alkali activator. This study confirms that KOH with low concentration affect the setting time and compressive strength of geopolymer in order to have good mechanical properties. Optimum result was observed at 4.5 M KOH. This result can be further developed to produce geopolymer with low alkaline activator for coating applications.

scholarly journals Improvement of High-Volume Fly Ash Cementitious Material Using Single Alkali Activation

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Wichian Chalee ◽  
Reaksmey Soeurt ◽  
Pumipat Pachana ◽  
Smith Songpiriyakij
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Setting Time ◽  
High Volume ◽  
Cementitious Material ◽  
Partial Replacement ◽  
Alkali Activation ◽  
Type I ◽  
Alkali Activator ◽  
High Volume Fly Ash

AbstractThis research aimed to present the improvement of the cementitious material in high-volume fly ash using only one alkali activator. Fly ash was used as a partial replacement for Portland cement type I, varying from 0 to 60% by weight of the binder. Concentrations of NaOH varying from 0.00 to 1.25 molar were used as alkali activator. Paste properties and mortar compressive strength at the ages of 3, 7, 14, 28, 60, and 90 days of water curing were investigated. The results reveal that fly ash paste with an alkali activator provides shorter initial setting time when compared to control paste without alkali activator. The use of 0.50 molar NaOH concentration in mortar containing fly ash not exceeding 50% by weight of binder provides the highest compressive strength at any age of curing. At that concentration, there is a significant increase in the 28-day compressive strength of up to 45% over that of the control mortar. In addition, higher NaOH concentration (not exceeding 1.00 molar) has a significant positive effect on the compressive strength of mortar with higher fly ash content, especially over longer curing periods.

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.

Mechanical Property of Phosphoaluminate Cement

2010 ◽  
Vol 150-151 ◽  
pp. 1754-1757 ◽  
Author(s):  
Peng Liu ◽  
Zhi Wu Yu ◽  
Ling Kun Chen ◽  
Zhu Ding
Keyword(s):  
Mechanical Property ◽  
Compressive Strength ◽  
Phase Composition ◽  
Electrical Properties ◽  
Pore Size Distribution ◽  
Pore Size ◽  
High Strength ◽  
Curing Time ◽  
Hydration Products ◽  
Resistance Value

The influence of curing time on the mechanical property of the phosphoaluminate cement (PAC) was investigated, and the mechanism was discussed as well. The phase composition and morphology of hydration products, electrical properties, porosity and pore size distribution of PAC cured different age were analyzed with XRD, EIS and MIP. The results showed PAC has the property of early-high strength, and the compressive strength of PAC cured for 1 day was about 70% of 28 days’. The main hydration products of PAC are micro-crystal phase and gel of phosphate and phosphoaluminate which formed compacter microstructure. In addition, there are no calcium hydroxide (CH) and ettringite (AFt) produced during the process of hydration. The compressive strength of PAC increased with age, which was due to more products continuously produced. The ac resistance analysis manifested as the change of the nyquist pattern and resistance value.

scholarly journals Influence of Particle Size Distribution of High Calcium Fly Ash on HVFA Mortar Properties

2018 ◽  
Vol 20 (2) ◽  
pp. 51
Author(s):  
Antoni . ◽  
Hendra Surya Wibawa ◽  
Djwantoro Hardjito
Keyword(s):  
Particle Size ◽  
Compressive Strength ◽  
Fly Ash ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Setting Time ◽  
High Volume ◽  
High Volume Fly Ash ◽  
High Calcium ◽  
High Calcium Fly Ash

This study evaluates the effect of particle size distribution (PSD) of high calcium fly ash on high volume fly ash (HVFA) mortar characteristics. Four PSD variations of high calcium fly ash used were: unclassified fly ash and fly ash passing sieve No. 200, No. 325 and No. 400, respectively. The fly ash replacement ratio of the cementitious material ranged between 50-70%. The results show that with smaller fly ash particles size and higher levels of fly ash replacement, the workability of the mixture was increased with longer setting time. There was an increase in mortar compressive strength with finer fly ash particle size, compared to those with unclassified ones, with the highest strength was found at those with fly ash passing mesh No. 325. The increase was found due to better compactability of the mixture. Higher fly ash replacement reduced the mortar’s compressive strength, however, the rate was reduced when finer fly ash particles was used.

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
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