The Effect of Lime Addition on the Setting Time and Strength of Ambient Cured Fly Ash Based Geopolymer Binder

Adam, Andi Arham; Amiri, Nur Hayati; Suarnita, I Wayan; Rupang, Nicodemus

doi:10.1051/matecconf/20164701015

Cited by 13 publications

(7 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To achieve these purposes, some researchers have been focusing on the use of other alumino-silicates, like class C fly ash and GGBS [4][5][6]. Other researchers prefer calcium sources addition [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Water absorption of ambient-cured geopolymer concrete

Adam,

Deviana,

Siregar

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

Self Cite

View full text Add to dashboard Cite

This study aims to determine the effect of the activator-binder ratio on the water absorption of ambient-cured geopolymer concrete. Class F fly ash from Mpanau power plant was used as precursor. This raw material was activated by a mixture of sodium silicate and sodium hydroxide solution, with an activator-binder ratio of 0,45; 0,50; 0,55; 0,60. Five percent replacement of fly ash by slaked lime was added to achieve ambient curing. The test specimen for the absorption test is made in the form of a cylinder with a size of 100 mm dia x 100 mm height. The absorption test used ASTM C642-06, and the test was conducted at the age of 28 days. The test results show that the geopolymer concrete with the largest activator/binder ratio has the lowest absorption, and volume permeable of voids. In this research, it was found that for the geopolymer concrete, activator-binder ratio of 0.60 has the lowest absorption and volume of permeable voids but gave the highest compressive strength. In addition, the test results show that normal concrete has the highest absorption and volume permeable of voids compared to the geopolymer concrete

show abstract

Section: Introductionmentioning

confidence: 99%

Water absorption of ambient-cured geopolymer concrete

Adam,

Deviana,

Siregar

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Using lime in alkaline activation mixtures has been explored in many research works. In the majority of them, the use of lime is limited to quantities between 1 and 20%, but normally at <10% [15][16][17][18][19]. Chakraborty et al [15] used sewage sludge ash (SSA), quick lime and blast furnace slag (BFS) as precursors activated with NaOH.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Lime–Pozzolan Geopolymer Systems: Microstructural, Mechanical and Durability Studies

et al. 2022

View full text Add to dashboard Cite

This work studies the possibility of using geopolymer materials to enhance the mechanical and durability properties of hydrated lime–pozzolan mixtures, which gave rise to the so-called “hybrid systems”. Two different waste types were used as pozzolan in the lime–pozzolan system: rice husk ash (RHA) and spent fluid catalytic cracking (FCC). The geopolymer fabricated with FCC was activated with commercial reagents (NaOH and Na2SiO3), and also with alternative sources of silica to obtain a lower carbon footprint in these mixtures. The alternative silica sources were RHA and residual diatomaceous earth (RDE) from the beer industry. The geopolymer mixture substituted the lime–pozzolan mixture for 30% replacement in weight. The hybrid systems showed better mechanical strengths for the short and medium curing ages in relation to the lime–pozzolan mixtures. Thermogravimetric analyses were performed to characterise the types of products formed in these mixtures. In the durability studies, hybrid systems better performed in freeze–thaw cycles and obtained lower capillarity water absorption values.

show abstract

“…Some researchers focused on the utilization of other alumino-silicate materials such as the class C fly ash and GGBS (Guo, Shi and Dick, 2010;Law et al, 2012;Wardhono, Law and Strano, 2015) . Adding a small amount of calcium to class F fly ash is another alternative to avoid heat curing (Dombrowski, Buchwald and Weil, 2007;Yip et al, 2008;Khater, 2011;Adam et al, 2016). In our previous research, the ambient cured class F fly ash geopolymer paste was achieved by adding 8%, 9%, and 10% slaked lime as the partial substitute for the fly ash.…”

Section: Introductionmentioning

confidence: 99%

“…It was found that the addition of lime increased strength but decreased the setting time. The setting time of the fly ash based geopolymer paste can be controlled by adding up to 10% of slaked lime (Adam et al, 2016). This paper aims to produce ambient-cured geopolymer concrete through the addition of calcium in the mixture.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Water to Solid Ratio, Activator to Binder Ratio, and Lime Proportion on the Compressive Strength of Ambient-Cured Geopolymer Concrete

Adam

2019

Journal of the Civil Engineering Forum

Self Cite

View full text Add to dashboard Cite

Low calcium fly ash based Geopolymer has been proven to be one of the potential alternatives substitutes to Portland Cement not only due to its high resistance to chemical attack but also because of the vast availability of class F fly ash for raw materials. However, one of the limitations of geopolymer as the alternative binders in concrete is that the strength develops slowly under ambient condition. This paper presented the investigation of water to solid ratio, activator to binder ratio, and lime proportion on the compressive strength of ambient-cured geopolymer concrete. To develop sufficient strength at an early age, class F fly ash and slaked lime (Ca (OH)2) were used as the binder with the proportion of lime to binder of 4%, 5%, 6%, and 7%. The blended binder was activated by sodium silicate and sodium hydroxide solution with the variation of activator to binder ratio of 0.45, 0.5, 0.55, and 0.6. The water to solid ratio of 0.30, 0.31, 0.32, and 0.33 was chosen to facilitate good workability which was done by adding water to the mix. The compressive strength tests were conducted at 7, 14, and 28 days on the cylindrical concrete specimens with a dimension of 100 mm diameter and 200 mm height. The results show that the activator to binder ratio of 0.50 to 0.55, and the proportion of lime to the binder of 6% to 7% were the optimum range value. It was also found that the lower the water to cement ratio the higher the compressive strength and the water to solid ratio as low as 0.3 produced the highest compressive strength while still maintaining good workability.

show abstract

The Effect of Lime Addition on the Setting Time and Strength of Ambient Cured Fly Ash Based Geopolymer Binder

Cited by 13 publications

References 14 publications

Water absorption of ambient-cured geopolymer concrete

Water absorption of ambient-cured geopolymer concrete

Hybrid Lime–Pozzolan Geopolymer Systems: Microstructural, Mechanical and Durability Studies

The Effects of Water to Solid Ratio, Activator to Binder Ratio, and Lime Proportion on the Compressive Strength of Ambient-Cured Geopolymer Concrete

Contact Info

Product

Resources

About