MECHANICAL STRENGTH DEGRADATION OF SLAG AND FLY ASH BASED GEOPOLYMER SPECIMENS EXPOSED TO SULFURIC ACID ATTACK

Anıl Niş; Melis B. Altundal

MECHANICAL STRENGTH DEGRADATION OF SLAG AND FLY ASH BASED GEOPOLYMER SPECIMENS EXPOSED TO SULFURIC ACID ATTACK

Abstract

In this study, mechanical properties and durability performances of fly ash based geopolymer concrete (FAGPC) and slag based geopolymer concrete (SGPC) were investigated against 5% sulfuric acid attack. The low calcium (F-type) fly ash (FA) and ground granulated blast furnace slag (GGBS) were utilized as binder materials with an amount of 360 kg/m3, and a combination of sodium silicate and 14 M sodium hydroxide with a silicate to hydroxide ratio of 2.5 were used as an alkaline activator in order to produce geopolymer concretes. The binder amounts were selected in accordance with the XA3 chemical environmental condition given in TS EN 206 standard. An ordinary Portland cement concrete (OPC) was also produced and exposed to sulfuric acid attacks for comparison. The effect of sulfuric acid on 150x150x150 mm cube and 100x200 mm cylinder specimens was evaluated by visual inspection, weight change, compressive and splitting tensile strength tests. Results indicated that similar surface deterioration was observed on the cube and cylinder specimens due to acid exposure. However, cube specimens showed more weight loss than the cylinder specimens, which can be attributed to the higher acid influenced area due to the size effect. In addition, the SGPC specimens exhibited superior mechanical performance, while FAGPC specimens showed the poorest mechanical performance when low binder amounts (360 kg/m3) were utilized under sulfuric acid attack. The results also pointed out that slag based geopolymer concrete can be utilized in structural applications instead of ordinary Portland cement concrete.

Keywords

References

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Details

Primary Language

English

Subjects

Engineering

Journal Section

Research Article

Authors

Anıl Niş This is me
0000-0001-9092-8088
Türkiye

Melis B. Altundal This is me
0000-0003-4236-2985
Türkiye

Publication Date

September 1, 2020

Submission Date

March 19, 2019

Acceptance Date

July 8, 2019

Published in Issue

Year 2019 Volume: 37 Number: 3

IZ

https://izlik.org/JA65LW84YP

Cite

RIS / Bibtex

APA

Niş, A., & Altundal, M. B. (2020). MECHANICAL STRENGTH DEGRADATION OF SLAG AND FLY ASH BASED GEOPOLYMER SPECIMENS EXPOSED TO SULFURIC ACID ATTACK. Sigma Journal of Engineering and Natural Sciences, 37(3), 917-926. https://izlik.org/JA65LW84YP

AMA

1.Niş A, Altundal MB. MECHANICAL STRENGTH DEGRADATION OF SLAG AND FLY ASH BASED GEOPOLYMER SPECIMENS EXPOSED TO SULFURIC ACID ATTACK. SIGMA. 2020;37(3):917-926. https://izlik.org/JA65LW84YP

Chicago

Niş, Anıl, and Melis B. Altundal. 2020. “MECHANICAL STRENGTH DEGRADATION OF SLAG AND FLY ASH BASED GEOPOLYMER SPECIMENS EXPOSED TO SULFURIC ACID ATTACK”. Sigma Journal of Engineering and Natural Sciences 37 (3): 917-26. https://izlik.org/JA65LW84YP.

EndNote

Niş A, Altundal MB (September 1, 2020) MECHANICAL STRENGTH DEGRADATION OF SLAG AND FLY ASH BASED GEOPOLYMER SPECIMENS EXPOSED TO SULFURIC ACID ATTACK. Sigma Journal of Engineering and Natural Sciences 37 3 917–926.

IEEE

[1]A. Niş and M. B. Altundal, “MECHANICAL STRENGTH DEGRADATION OF SLAG AND FLY ASH BASED GEOPOLYMER SPECIMENS EXPOSED TO SULFURIC ACID ATTACK”, SIGMA, vol. 37, no. 3, pp. 917–926, Sept. 2020, [Online]. Available: https://izlik.org/JA65LW84YP

ISNAD

Niş, Anıl - Altundal, Melis B. “MECHANICAL STRENGTH DEGRADATION OF SLAG AND FLY ASH BASED GEOPOLYMER SPECIMENS EXPOSED TO SULFURIC ACID ATTACK”. Sigma Journal of Engineering and Natural Sciences 37/3 (September 1, 2020): 917-926. https://izlik.org/JA65LW84YP.

JAMA

1.Niş A, Altundal MB. MECHANICAL STRENGTH DEGRADATION OF SLAG AND FLY ASH BASED GEOPOLYMER SPECIMENS EXPOSED TO SULFURIC ACID ATTACK. SIGMA. 2020;37:917–926.

MLA

Niş, Anıl, and Melis B. Altundal. “MECHANICAL STRENGTH DEGRADATION OF SLAG AND FLY ASH BASED GEOPOLYMER SPECIMENS EXPOSED TO SULFURIC ACID ATTACK”. Sigma Journal of Engineering and Natural Sciences, vol. 37, no. 3, Sept. 2020, pp. 917-26, https://izlik.org/JA65LW84YP.

Vancouver

1.Anıl Niş, Melis B. Altundal. MECHANICAL STRENGTH DEGRADATION OF SLAG AND FLY ASH BASED GEOPOLYMER SPECIMENS EXPOSED TO SULFURIC ACID ATTACK. SIGMA [Internet]. 2020 Sep. 1;37(3):917-26. Available from: https://izlik.org/JA65LW84YP