Title:
Long-Term Mechanical Properties of Blended Fly Ash—Rice Husk Ash Alkali-Activated Concrete
Author(s):
S. Fernando, C. Gunasekara, D. W. Law, M. C. M. Nasvi, S. Setunge, R. Dissanayake, and M. G. M. U. Ismail
Publication:
Materials Journal
Volume:
119
Issue:
5
Appears on pages(s):
175-188
Keywords:
compressive strength; low-calcium fly ash; mechanical properties; microcracking; microstructure; rice husk ash
DOI:
10.14359/51735954
Date:
9/1/2022
Abstract:
This paper presents an experimental investigation on the long-term mechanical properties of alkali-activated concrete prepared with low-calcium fly ash and rice husk ash (RHA). Detailed chemical, microstructural, and pore structure analysis were evaluated to elucidate the variation of the long-term mechanical properties. The addition of 10% RHA leads to a reduction in all mechanical properties—that is, compressive strength, flexural strength splitting, tensile strength, and elastic modulus—for all ages up to 365 days. Lower workability and higher density resulted from the addition of 10% RHA attributed to its higher unburnt carbon content and specific surface area. From 7 to 28 days, both concrete (100% fly ash and 10% RHA-90% fly ash concrete) showed an incremental
increase in strength for all mechanical properties. However, all
properties subsequently decreased from 28 to 365 days. Crack
propagation was evident after 28 days in both concrete, which is identified as negatively influencing the microstructure, and is the cause of the observed deterioration in the mechanical properties after 28 days. It is postulated that the combined effects of the degree of microcracking and the homogeneity in structure are the primary factors that govern the long-term mechanical strength properties for blended fly ash-RHA alkali-activated concrete.
Related References:
1. von Buchwaldt, A., “Four Challenges to Achieving Sustainability in the Cement Industry,” EY Parthenon, 2020, https://www.ey.com/en_gl/strategy/strategic-leaps-in-cement-production. (last accessed July 28, 2022)
2. McLellan, B. C.; Williams, R. P.; Lay, J.; van Riessen, A.; and Corder, G. D., “Costs and Carbon Emissions for Geopolymer Pastes in Comparison to Ordinary Portland Cement,” Journal of Cleaner Production, V. 19, No. 9-10, 2011, pp. 1080-1090. doi: 10.1016/j.jclepro.2011.02.010
3. Amer, I.; Kohail, M.; El-Feky, M. S.; Rashad, A.; and Khalaf, M. A., “A Review on Alkali-Activated Slag Concrete,” Ain Shams Engineering Journal, V. 12, No. 2, 2021, pp. 1475-1499. doi: 10.1016/j.asej.2020.12.003
4. Albitar, M.; Mohamed Ali, M. S.; Visintin, P.; and Drechsler, M., “Durability Evaluation of Geopolymer and Conventional Concretes,” Construction and Building Materials, V. 136, 2017, pp. 374-385. doi: 10.1016/j.conbuildmat.2017.01.056
5. Abdullah, M. M. A. B.; Kamarudin, H.; Binhussain, M.; Nizar, K.; Razak, R.; and Yahya, Z., “Comparison of Geopolymer Fly Ash and Ordinary Portland Cement to the Strength of Concrete,” Advanced Science Letters, V. 19, No. 12, 2013, pp. 3592-3595. doi: 10.1166/asl.2013.5187
6. Khale, D., and Chaudhary, R., “Mechanism of Geopolymerization and Factors Influencing its Development: A Review,” Journal of Materials Science, V. 42, No. 3, 2007, pp. 729-746. doi: 10.1007/s10853-006-0401-4
7. Huynh, T. P.; Hwang, C. L.; and Lin, K. L., “Performance and Microstructure Characteristics of the Fly Ash and Residual Rice Husk Ash‐Based Geopolymers Prepared at Various Solid‐to‐Liquid Ratios and Curing Temperatures,” Environmental Progress & Sustainable Energy, V. 36, No. 1, 2017, pp. 83-92. doi: 10.1002/ep.12445
8. Das, S. K.; Mishra, J.; Singh, S. K.; Mustakim, S. M.; Patel, A.; Das, S. K.; and Behera, U., “Characterization and Utilization of Rice Husk Ash (RHA) in Fly Ash – Blast Furnace Slag Based Geopolymer Concrete for Sustainable Future,” Materials Today: Proceedings, V. 33, 2020, pp. 5162-5167. doi: 10.1016/j.matpr.2020.02.870
9. Khan, M. N. N., “Jami., M.; Kaish, A. B. M.; and Zain, M., “An Overview on Manufacturing of Rice Husk Ash as Supplementary Cementitous Material,” Australian Journal of Basic and Applied Sciences, V. 8, No. 19, 2014, pp. 176-181.
10. Hwang, C. L., and Huynh, T. P., “Effect of Alkali-Activator and Rice Husk Ash Content on Strength Deveoplment of Fly Ash and Residual Rice Husk Ash Based Geopolymers,” Construction and Building Materials, V. 101, 2015, pp. 1-9. doi: 10.1016/j.conbuildmat.2015.10.025
11. Kusbiantoro, A.; Nuruddin, M. F.; Shafiq, N.; and Qazi, S. A., “The Effect of Microwave Incinerated Rice Husk Ash on the Compressive and Bond Strength of Fly Ash Based Geopolymer Concrete,” Construction and Building Materials, V. 36, 2012, pp. 695-703. doi: 10.1016/j.conbuildmat.2012.06.064
12. Usman, M., and Pandian, S., “Study on Fly Ash and Rice Husk Ash Based Geopolymer Concrete with Steel Fibre,” Civil Engineering Systems and Sustainable Innovations, 2014, pp. 978-993.
13. Inti, S.; Sharma, M.; and Tandon, V., “Ground Granulated Blast Furnace Slag (GGBS) and Rice Husk Ash (RHA) Uses in the Production of Geopolymer Concrete,” Geo-Chicago 2016, 2016, pp. 621-632.
14. AS 3582.1, “Supplementary Cementitious Materials for Use with Portland and Blended Cement Fly Ash,” Standards Australia, Sydney, Australia, 1998.
15. Hardjito, D., and Rangan, B. V., “Development and Properties of Low-Calcium Fly Ash-Based Geopolymer Concrete,” Research Report GC 1, Curtin University of Technology, Perth, Australia, 2005.
16. Khodr, M.; Law, D. W.; Gunasekara, C.; Setunge, S.; and Brkljaca, R., “Compressive Strength and Microstructure Evolution of Low Calcium Brown Coal Fly Ash-Based Geopolymer,” Journal of Sustainable Cement-Based Materials, V. 9, No. 1, 2020, pp. 17-34. doi: 10.1080/21650373.2019.1666061
17. Nasvi, M.; Gunasekara, M. C. M.; Law, D. W.; Setunge, S.; Dissanyake, P. B. R.; and Fernando, S., “Mix Optimization of Geopolymer Mortar Produced with Low Calcium Fly Ash in Sri Lanka,” 10th International Conference on Structural Engineering and Construction Management (ICSECM), Kandy, Sri Lanka, 2019.
18. Fernando, S.; Gunasekara, C.; Law, D. W.; Nasvi, M. C. M.; Setunge, S.; Dissanayake, R.; and Ismail, M. G. M. U., “Investigation of the Reaction Mechanism of Blended Fly Ash and Rice Husk Ash Alkali-Activated Binders,” Archives of Civil and Mechanical Engineering, V. 22, No. 1, 2022, p. 24. doi: 10.1007/s43452-021-00349-6
19. AS 1012.9, “Methods of Testing Concrete–Compressive Strength Tests–Concrete, Mortar and Grout Specimens,” Standards Australia, Sydney, Australia, 2014.
20. AS 1012.11, “Methods of Testing Concrete Determination of the Modulus of Rupture,” Standards Australia, Sydney, Australia, 2000.
21. AS 1012.10, “Methods of Testing Concrete Determination of Indirect Tensile Strength of Concrete Cylinders,” Standards Australia, Sydney, Australia, 2000.
22. AS 1012.12.2, “Methods of Testing Concrete–Determination of Mass per Unit Volume of Hardened Concrete–Water Displacement,” Standards Australia, Sydney, Australia, 1998.
23. AS 1012.17, “Methods of Testing Concrete – Determination of the Static Chord Modulus of Elasticity and Poisson’s Ratio of Concrete Specimens,” Standards Australia, Sydney, Australia, 1997.
24. AS 1012.3.1, “Methods of Testing Concrete–Determination of Properties Related to the Consistency of Concrete,” Standards Australia, Sydney, Australia, 2014.
25. Kirschner, A., and Harmuth, H., “Investigation of Geopolymer Binders with Respect to their Application for Building Materials,” Ceramics-Silikáty, V. 48, No. 11, 2004, pp. 7-20.
26. Fernandez-Jimenez, A. M., “Palomo, A. and Lopez-Hombrados, C., “Engineering Properties of Alkali-Activated Fly Ash Concrete,” ACI Materials Journal, V. 103, No. 2, Mar.-Apr. 2006, pp. 106-112.
27. Nath, P., and Sarker, P. K., “Flexural Strength and Elastic Modulus of Ambient-Cured Blended Low-Calcium Fly Ash Geopolymer Concrete,” Construction and Building Materials, V. 130, 2017, pp. 22-31. doi: 10.1016/j.conbuildmat.2016.11.034
28. Gupta, R.; Tomar, A. S.; Mishra, D.; and Sanghi, S. K., “Multinuclear MAS NMR Characterization of Fly‐Ash‐Based Advanced Sodium Aluminosilicate Geopolymer: Exploring Solid‐State Reactions,” ChemistrySelect, V. 5, No. 16, 2020, pp. 4920-4927. doi: 10.1002/slct.202000203
29. Gunasekera, C.; Law, D. W.; Setunge, S.; Burgar, I.; and Brkljaca, R., “Effect of Element Distribution on Strength in Fly Ash Geopolymers,” ACI Materials Journal, V. 114, No. 5, Sept.-Oct. 2017, pp. 795-808. doi: 10.14359/51689779
30. Hamdan, H.; Muhid, M. N. M.; Endud, S.; Listiorini, E.; and Ramli, Z., “29Si MAS NMR, XRD and FESEM Studies of Rice Husk Silica for the Synthesis of Zeolites,” Journal of Non-Crystalline Solids, V. 211, No. 1-2, 1997, pp. 126-131. doi: 10.1016/S0022-3093(96)00611-4
31. Fernández-Jiménez, A.; Palomo, A.; Sobrados, I.; and Sanz, J., “The Role Played by the Reactive Alumina Content in the Alkaline Activation of Fly Ashes,” Microporous and Mesoporous Materials, V. 91, No. 1-3, 2006, pp. 111-119. doi: 10.1016/j.micromeso.2005.11.015
32. De Silva, P.; Sagoe-Crenstil, K.; and Sirivivatnanon, V., “Kinetics of Geopolymerization: Role of Al2O3 and SiO2,” Cement and Concrete Research, V. 37, No. 4, 2007, pp. 512-518. doi: 10.1016/j.cemconres.2007.01.003
33. Provis, J. L., and van Deventer, J. S. J., “Geopolymerisation Kinetics. 1. In Situ Energy-Dispersive X-Ray Diffractometry,” Chemical Engineering Science, V. 62, No. 9, 2007, pp. 2309-2317. doi: 10.1016/j.ces.2007.01.027
34. Hajimohammadi, A., and van Deventer, J. S. J., “Dissolution Behaviour of Source Materials for Synthesis of Geopolymer Binders: A Kinetic Approach,” International Journal of Mineral Processing, V. 153, 2016, pp. 80-86. doi: 10.1016/j.minpro.2016.05.014
35. Ke, X.; Bernal, S. A.; Ye, N.; Provis, J. L.; and Yang, J., “One‐Part Geopolymers Based on Thermally Treated Red Mud/NaOH Blends,” Journal of the American Ceramic Society, V. 98, No. 1, 2015, pp. 5-11. doi: 10.1111/jace.13231
36. Kupwade-Patil, K., and Allouche, E. N., “Impact of Alkali Silica Reaction on Fly Ash-Based Geopolymer Concrete,” Journal of Materials in Civil Engineering, ASCE, V. 25, No. 1, 2013, pp. 131-139. doi: 10.1061/(ASCE)MT.1943-5533.0000579
37. Kani, E. N., and Allahverdi, A., “Effect of Chemical Composition on Basic Engineering Properties of Inorganic Polymeric Binder Based on Natural Pozzolan,” Ceramics-Silikáty, V. 53, No. 3, 2009, pp. 195-204.
38. Najafi Kani, E.; Allahverdi, A.; and Provis, J. L., “Efflorescence Control in Geopolymer Binders Based on Natural Pozzolan,” Cement and Concrete Composites, V. 34, No. 1, 2012, pp. 25-33. doi: 10.1016/j.cemconcomp.2011.07.007
39. Khan, I.; Xu, T.; Castel, A.; Gilbert, R. I.; and Babaee, M., “Risk of Early Age Cracking in Geopolymer Concrete Due to Restrained Shrinkage,” Construction and Building Materials, V. 229, 2019, p. 116840. doi: 10.1016/j.conbuildmat.2019.116840
40. Thomas, R. J.; Lezama, D.; and Peethamparan, S., “On Drying Shrinkage in Alkali-Activated Concrete: Improving Dimensional Stability by Aging or Heat-Curing,” Cement and Concrete Research, V. 91, 2017, pp. 13-23. doi: 10.1016/j.cemconres.2016.10.003