TY  - JOUR
T1  - The Comparison of the Properties of Geopolymer Paste and Ordinary Portland Cement Mortar Produced Using Polycarboxylate Based Admixture
TT  - The Comparison of the Properties of Geopolymer Paste and Ordinary Portland Cement Mortar Produced Using Polycarboxylate Based Admixture
AU  - Arıöz, Evren
AU  - Saraç, Gamze
AU  - Arıöz, Ömer
AU  - Koçkar, Ö. Mete
PY  - 2022
DA  - March
DO  - 10.31590/ejosat.1083318
JF  - Avrupa Bilim ve Teknoloji Dergisi
JO  - EJOSAT
PB  - Osman SAĞDIÇ
WT  - DergiPark
SN  - 2148-2683
SP  - 537
EP  - 540
IS  - 34
LA  - en
AB  - Chemical admixtures are generally used in ready mixed concrete production to improve and enhance the concrete properties. Polycarboxylate based superplasticizers are classified as third generation plasticizing admixtures which increase fluidity and workability without decreasing compressive strength. Geopolymers having many superior properties are alternative materials to ordinary Portland cement concrete. Geopolymers are environmentally friendly and sustainable materials because they can be synthesized from waste materials such as fly ash. In this experimental study, geopolymer pastes were produced by using fly ash, 10 M sodium hydroxide, sodium silicate solution and plasticizer. Cement mortars were produced according to TS EN 196-1 standard. Polycarboxylate based plasticizers synthesized at laboratory conditions were used at 1% by weight in both ordinary Portland cement mortar and geopolymer paste.  Geopolymer samples were aged for 7 and 28 days at laboratory conditions while cement mortars were aged in water bath. The fluidity values of fresh mixtures were determined. The flexural strength and compressive strength tests were conducted at the ages of 7 and 28 days. The plasticizers had positive effects on cement mortars but unfavorable results on geopolymer. The use of plasticizer increased the fluidity and the strength values in mortars, on the contrary, admixtures caused decrease in the values of geopolymer samples. The highest compressive strength was obtained as 38.3 MPa for mortar sample aged for 28 days and was 15.3 MPa for geopolymer samples.
KW  - Plasticizer
KW  - Cement mortar
KW  - Compressive strength
KW  - Geopolymer
KW  - Workability
N2  - Chemical admixtures are generally used in ready mixed concrete production to improve and enhance the concrete properties. Polycarboxylate based superplasticizers are classified as third generation plasticizing admixtures which increase fluidity and workability without decreasing compressive strength. Geopolymers having many superior properties are alternative materials to ordinary Portland cement concrete. Geopolymers are environmentally friendly and sustainable materials because they can be synthesized from waste materials such as fly ash. In this experimental study, geopolymer pastes were produced by using fly ash, 10 M sodium hydroxide, sodium silicate solution and plasticizer. Cement mortars were produced according to TS EN 196-1 standard. Polycarboxylate based plasticizers synthesized at laboratory conditions were used at 1% by weight in both ordinary Portland cement mortar and geopolymer paste.  Geopolymer samples were aged for 7 and 28 days at laboratory conditions while cement mortars were aged in water bath. The fluidity values of fresh mixtures were determined. The flexural strength and compressive strength tests were conducted at the ages of 7 and 28 days. The plasticizers had positive effects on cement mortars but unfavorable results on geopolymer. The use of plasticizer increased the fluidity and the strength values in mortars, on the contrary, admixtures caused decrease in the values of geopolymer samples. The highest compressive strength was obtained as 38.3 MPa for mortar sample aged for 28 days and was 15.3 MPa for geopolymer samples.
CR  - Cagg, C. R. (2014). Cement and concrete as an engineering material: An historic appraisal and case study analysis. Engineering Failure Analysis, 40, 114 – 140. https://doi.org/10.1016/j.engfailanal.2014.02.004
CR  - SinghN.B., KumarM. & Rai S. (2020). Geopolymer cement and concrete: Properties. Materials Today: Proceedings, 29, 743-748. https://doi.org/10.1016/j.matpr.2020.04.513
CR  - Damme, H.V. (2018). Concrete material science: Past, present, and future innovations. Cement and Concrete Research, 112, 5-24. https://doi.org/10.1016/j.cemconres.2018.05.002
CR  - Thamilselvi, P., Siva A., & D. Oyejobi. (2017). Geopolymer Concrete: Overview. International Journal of Advanced Research in Engineering and Technology, 8, 10-14.
CR  - Pavithra P., Reddy M.S., Dinakar P., Rao B. H., Satpathy B.K. & Mohanty A.N. (2016). A mix design procedure for geopolymer concrete with fly ash. Journal of Cleaner Production, 133, 117-125. https://doi.org/10.1016/j.jclepro.2016.05.041
CR  - Mehta A. & Siddique R. (2016). An overview of geopolymers derived from industrial by-products. Construction and Building Materials, 127, 183-198. https://doi.org/10.1016/j.conbuildmat.2016.09.136
CR  - Li F., Chen D., Yang Z., Lu Y., Zhang H. & Li S. (2022). Effect of mixed fibers on fly ash-based geopolymer resistance against carbonation. Construction and Building Materials, 322, 126394. https://doi.org/10.1016/j.conbuildmat.2022.126394
CR  - Degefu D.M., Liao Z., Berardi U. & Labbe G. (2022). The dependence of thermophysical and hygroscopic properties of macro-porous geopolymers on Si/Al. Journal of Non-Crystalline Solids, 582, 121432. https://doi.org/10.1016/j.jnoncrysol.2022.121432
CR  - Podolsky Z., Liu J., Doh J.H., Guerrieri M. & Fragomeni S. (2021). State of the art on the application of waste materials in geopolymer concrete. Case Studies in Construction Materials, 15, e00687. https://doi.org/10.1016/j.cscm.2021.e00637
CR  - Li S., Zhang J., Li Z., Gao Y. & Liu C. (2021). Feasibility study of red mud-blast furnace slag based geopolymeric grouting material: Effect of superplasticizers. Construction and Building Materials, 267, 120910. https://doi.org/10.1016/j.conbuildmat.2020.120910
CR  - Mardani-Aghabaglou A., Tuyan M., Yılmaz G., Arıöz Ö. & Ramyar K. (2013). Effect of different types of superplasticizer on fresh, rheological and strength properties of self-consolidating concrete. Construction and Building Materials, 47, 1020-1025. https://doi.org/10.1016/j.conbuildmat.2013.05.105
CR  - Wang C., Kayali O. & Liow J. (2021). The effectiveness and mechanisms of superplasticisers in dispersing class F fly ash pastes. Powder Technology, 392, 81-92. https://doi.org/10.1016/j.powtec.2021.06.054
CR  - Kang S.H., Kwon M., Kwon Y. & Moon J. (2021). Effects of polycarboxylate ether (PCE)-based superplasticizer on the dissolution and subsequent hydration of calcium oxide (CaO). Cement and Concrete Research, 146, 106467. https://doi.org/10.1016/j.cemconres.2021.106467
CR  - Ren J., Wang X., Xu S., Luo Q., Fang Y., Zhu J.  & Xing F. (2021). Effects of polycarboxylate superplasticiser on hydration characteristics and hardened properties of cement blended with seawater. Construction and Building Materials, 304, 124660. https://doi.org/10.1016/j.conbuildmat.2021.124660
CR  - Al-Shwaiter A., Awang H. & Khalaf M. A. (2021). The influence of superplasticiser on mechanical, transport and microstructure properties of foam concrete. Journal of King Saud University - Engineering Sciences, In Press, Corrected Proof, 2021. https://doi.org/10.1016/j.jksues.2021.02.010
UR  - https://doi.org/10.31590/ejosat.1083318
L1  - https://dergipark.org.tr/tr/download/article-file/2291913
ER  -