Strength and microstructural properties of fly ash based geopolymer concrete containing high-calcium and water-absorptive aggregate
作者： Rahimah Embong , Andri Kusbiantoro , Nasir Shafiq , Muhd Fadhil Nuruddin
DOI: 10.1016/J.JCLEPRO.2015.06.058
关键词:
摘要: In this research, performance of limestone and oil palm shell (OPS) as the alternative aggregates in fly ash based geopolymer concrete was evaluated on fresh hardened test. Fly were studied due to their abundant availability industrial agricultural waste. Experimental works conducted by replacing portion coarse fine aggregate with various percentages. Evaluation its done slump, compressive strength, porosity Microstructure analysis added via Scanning Electron Microscope (SEM) Energy Dispersive X-Ray (EDX) test support generated hypothesis. From properties test, increasing amount OPS have shortened setting time concrete, even though they presented small variations slump's height diameter results. The Calcium Aluminate Silicate Hydrate (C–A–S–H) structure specimen higher polycondensation rate optimum water content specimens stimulated rapid production gel improved strength ambient curing condition. Moderate absorption from fibers additional dissolution Al Si elements formation C–A–S–H gels inclusion 10% 25% replacement river sand granite aggregate, respectively. curing, a 35.23% while had 11.01% than control. An escalation temperature reduced efficiency both aggregates, where only able produce 2.34% control A supportive SEM EDX has also revealed existence poly(sialate), poly(sialate-siloxo), poly(sialate-disiloxo) sialate link matrix. applications nurturing result, particularly ambient-cured application.
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sci-hub.se 参考文章(24)
Pavel Krivenko, Caijun Shi, Della Roy, Alkali-Activated Cements and Concretes ,(2003)
Joseph Davidovits, Geopolymer Chemistry and Applications ,(2008)
Paulo Monteiro, P. K. Mehta, Concrete: Microstructure, Properties, and Materials ,(2005)
Adam Matthew Neville, Properties of concrete ,(1968)
Benjamin C. McLellan, Ross P. Williams, Janine Lay, Arie van Riessen, Glen D. Corder, Costs and carbon emissions for geopolymer pastes in comparison to ordinary portland cement Journal of Cleaner Production. ,vol. 19, pp. 1080- 1090 ,(2011) , 10.1016/J.JCLEPRO.2011.02.010
Sravanthi Puligilla, Paramita Mondal, Role of slag in microstructural development and hardening of fly ash-slag geopolymer Cement and Concrete Research. ,vol. 43, pp. 70- 80 ,(2013) , 10.1016/J.CEMCONRES.2012.10.004
W.K.W. Lee, J.S.J. van Deventer, The effect of ionic contaminants on the early-age properties of alkali-activated fly ash-based cements Cement and Concrete Research. ,vol. 32, pp. 577- 584 ,(2002) , 10.1016/S0008-8846(01)00724-4
I. Garcia-Lodeiro, A. Palomo, A. Fernández-Jiménez, D.E. Macphee, Compatibility studies between N-A-S-H and C-A-S-H gels. Study in the ternary diagram Na2O–CaO–Al2O3–SiO2–H2O Cement and Concrete Research. ,vol. 41, pp. 923- 931 ,(2011) , 10.1016/J.CEMCONRES.2011.05.006
Alaa M. Rashad, Potential use of phosphogypsum in alkali-activated fly ash under the effects of elevated temperatures and thermal shock cycles Journal of Cleaner Production. ,vol. 87, pp. 717- 725 ,(2015) , 10.1016/J.JCLEPRO.2014.09.080
Ivana Perná, Tomáš Hanzlíček, The solidification of aluminum production waste in geopolymer matrix Journal of Cleaner Production. ,vol. 84, pp. 657- 662 ,(2014) , 10.1016/J.JCLEPRO.2014.04.043