TY - JOUR
T1 - Factors influencing strength and setting time of fly ash based-geopolymer paste
AU - Leonard Wijaya, Adhitya
AU - Jaya Ekaputri, Januarti
AU - Triwulan,
N1 - Publisher Copyright:
© The Authors, published by EDP Sciences, 2017.
PY - 2017/12/30
Y1 - 2017/12/30
N2 - In general, fly ash is often used as a binder in geopolymer mixture. In this paper, seven samples of fly ash were collected from five Indonesian power plants. The variation of fly ash may depend upon many factors. However, there is no standardization of fly ash used for geopolymer binder. This experiment was conducted to study and categorize fly ashes both by assessing their physical and chemical characters. All fly ashes were activated with alkali activator to prepare geopolymer paste. Ratio of fly ash to the alkali activator was kept constant at 65: 35. Compression test was conducted at three, seven, 14, 21, 28, and 56 days to identify the strength development of each sample. The result revealed that the content of CaO in fly ash affected the setting time and early strength development. In three days paste with CaO content more than 20% gain 54% of its 28-day strength. It is caused by both hydration and polymerization reactions. A range of Si to Al ratio contributed to the strength.
AB - In general, fly ash is often used as a binder in geopolymer mixture. In this paper, seven samples of fly ash were collected from five Indonesian power plants. The variation of fly ash may depend upon many factors. However, there is no standardization of fly ash used for geopolymer binder. This experiment was conducted to study and categorize fly ashes both by assessing their physical and chemical characters. All fly ashes were activated with alkali activator to prepare geopolymer paste. Ratio of fly ash to the alkali activator was kept constant at 65: 35. Compression test was conducted at three, seven, 14, 21, 28, and 56 days to identify the strength development of each sample. The result revealed that the content of CaO in fly ash affected the setting time and early strength development. In three days paste with CaO content more than 20% gain 54% of its 28-day strength. It is caused by both hydration and polymerization reactions. A range of Si to Al ratio contributed to the strength.
UR - http://www.scopus.com/inward/record.url?scp=85040532331&partnerID=8YFLogxK
U2 - 10.1051/matecconf/201713801010
DO - 10.1051/matecconf/201713801010
M3 - Conference article
AN - SCOPUS:85040532331
SN - 2261-236X
VL - 138
JO - MATEC Web of Conferences
JF - MATEC Web of Conferences
M1 - 01010
T2 - 6th International Conference of Euro Asia Civil Engineering Forum, EACEF 2017
Y2 - 22 August 2017 through 25 August 2017
ER -