纳米二氧化硅改性粉煤灰地聚合物力学性能及微观分析

doi:10.11896/cldb.19080113

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Abstract The effects of nano-SiO₂ on the setting time, fluidity and mechanical properties of fly ash-based geopolymer were investigated systematically. The microstructure of the system was tested by XRD, SEM and thermal analysis methods to investigate the polymerization of nano-SiO₂ to fly ash and the mechanism of modification of the substance. The results show that the incorporation of nano-SiO₂ is a decrease in the fluidity of the system, and the condensation time is shortened, and the greater the amount of the addition, the more noticeable the effect. Nano-SiO₂ can improve the early compressive strength of fly ash-based geopolymer, and the suitable content of nano-SiO₂ is 1% (mass fraction). The nano-SiO₂ increases the compressive strength of the fly ash-based geopolymer through chemical reaction, particle filling and seed nucleation.

Key words： nano-silica fly ash geopolymer compressive strength microstructure

Published: 02 December 2020

CLC number:

TB324

Fund:This work was supported by the Opening Project of State Key Laboratory of Green Building Materials, China Building Materials Academy(0211002402028).

About author:: Xin Liu, a master candidate, currently study in Chongqing University. His research interests are fly ash geopolymer, nano materials.Hongyu Yangreceived his Ph.D. from University of Science and Technology of China in 2015. He is currently an associate professor in College of Materials Science and Engineering, Chongqing University. His research interests are flame-retardant polymeric mate-rials, chemical building materials and so on.

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	LIU Xin
	PENG Zechuan
	PAN Chenhao
	HU Xin
	WAN Chaojun
	YANG Hongyu

Cite this article:

LIU Xin,PENG Zechuan,PAN Chenhao, et al. Mechanical Properties and Microscopic Analysis of Nano-silica Modified Fly Ash Geopolymer[J]. Materials Reports, 2020, 34(22): 22078-22082.

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http://www.mater-rep.com/EN/10.11896/cldb.19080113 OR http://www.mater-rep.com/EN/Y2020/V34/I22/22078

Davidovits J.Journal of Thermal Analysis,1989,35(2),429.2 Gao X, Yu Q L, Brouwers H.Construction and Building Materials, 2015, 98,397.3 Tom G, John D, Russell G, et al.In: Proceeding of 27th Biennial National Conference of the Concrete Institute of Australia in Conjunction With the 69th RILEM Week. Melbourne, Australia,2015, pp. 679.4 Guo X, Shi H, Chen L, et al.Journal of Hazardous Materials,2010,173,480.5 Daniel L Y K, Jay C S. Cement and Concrete Research, 2010,40(2),334.6 Chindaprasirta P, Rattanasakb U, Taebuanhuadb.Advanced Powder Technology, 2013,24(3),703.7 Peigang H, Dechang J. Meirong W, et al.Ceramics International,2011,37(1),59.8 Hussin M W. Bhutta M A R, Azreen M, et al. Materials and Structures, 2015,48(3),709.9 Cuo X, Shi H, Dick W A. Cement and Concrete Composites,2010,32(2),142.10 Temuujin J, Williams R P, Riessen A V, Journal of Materials Processing Technology, 2009,209,5276.11 Hou P Z. Effect of nano-SiO2 on hydration and hardening of cement fly ash system. Ph.D. Thesis, Chongqing University, China, 2012 (in Chinese).侯鹏坤.纳米SiO2对水泥粉煤灰体系水化硬化作用研究.博士学位论文,重庆大学,2012.12 Sato T, Diallo F. Journal of the Transportation Research Board, 2010,2141,61.13 Shekari A H, Razzaghi M S. Procedia Engineering, 2011,14,3036.14 Abdoli Y N, Arefi M R, Mollaahmadi E, et al. Life Science Journal, 2011,8(4),550.15 Guo X L, Shi H S, Xia M. Journal of Functional Materials, 2016(11),11001 (in Chinese).郭晓潞,施惠生,夏明.功能材料,2016(11),11001.16 Phoo-ngernkham T, Chindaprasirt P, Sata V, et al. Materials and Design, 2014,55,58.17 Riahi S, Nazari A. Ceramics International, 2012,38(6),4467.18 Ramezanianpour Ali Akbar, Moeini Mohammad Amin. Construction and Building Materials , 2018,163,611.19 Xie T, Ozbakkaloglu T. Ceramics International, 2015, 41(4),5945.20 Chindaprasirt P, De Silva P, Sagoe-Crentsil K, et al. Journal of Mate-rials Science, 2012,47(12),4876.21 Silva P D, Sagoe-Crenstil K. Cement and Concrete Research, 2008,38(6),870.22 Silva P D, Sagoe-Crenstil K. Journal of the Australian Ceramic Society, 2009,45(1),63.23 Weng L, Sagoe-Crentsil K. Journal of Materials Science, 2007,42(9), 2997.24 Sagoe-Crentsil K, Weng L. Journal of Materials Science, 2007,42(9),3007.25 Assaedi H, Shaikh F U A, Low I M. Construction and Building Mate-rials, 2016, 123,541.26 Adak D, Sarkar M, Mandal S. Construction and Building Materials, 2017, 135,430.27 Adak D, Sarkar M, Mandal S. Construction and Building Materials, 2014, 70,453.