Title:
High-Strength, Cement-Free Concrete of Flue Gas Desulfurization Gypsum-Based Non-Fired Brick
Author(s):
Dongxue Yu, Jun Zhou, Zhu Shu, and Yanxin Wang
Publication:
Materials Journal
Volume:
113
Issue:
6
Appears on pages(s):
745-752
Keywords:
building materials; cement-free concrete; flue gas desulfurization gypsum; non-fired brick; waste recycling
DOI:
10.14359/51689239
Date:
11/1/2016
Abstract:
A high-strength, cement-free concrete, non-fired brick was prepared merely using waste flue gas desulfurization (FGD) gypsum, river sand, and water with a cost-effective technology. The processing procedures consisted of drying FGD gypsum, mixing the dried power with river sand, adding water, stirring, press-forming, spraying water, and naturally curing. The results revealed that the optimal content of FGD gypsum was as high as 75%, and the economical press-forming pressure was just 10 MPa (1.45 ksi). Furthermore, the 7-day compressive strength of the as-prepared non-fired brick was up to 34 MPa (4.93 ksi), which was far beyond the property requirements of the highest grade (MU25) of non-fired rubbish gangue bricks stated in the Chinese standard (JC/T422-2007). The excellent characteristics resulted from the dense macrostructure of brick body formed by press-forming and the interlocking microstructure of dihydrate gypsum crystals attained by
water-spraying and naturally curing.
Related References:
1. Tzouvalas, G.; Rantis, G.; and Tsimas, S., “Alternative Calcium-Sulfate-Bearing Materials as Cement Retarders: Part II. FGD Gypsum,” Cement and Concrete Research, V. 34, No. 11, 2004, pp. 2119-2125. doi: 10.1016/j.cemconres.2004.03.021
2. Yan, Y. B.; Dong, X. L.; Sun, X. L.; Sun, X. Y.; Li, J. S.; Shen, J. Y.; Han, W. Q.; Liu, X. D.; and Wang, L. J., “Conversion of Waste FGD Gypsum into Hydroxyapatite for Removal of Pb2+ And Cd2+ from Wastewater,” Journal of Colloid and Interface Science, V. 429, Sept. 2014, pp. 68-76. doi: 10.1016/j.jcis.2014.05.010
3. Koukouzas, N., and Vasilatos, C., “Mineralogical and Chemical Properties of FGD Gypsum from Florina, Greece,” Journal of Chemical Technology and Biotechnology (Oxford, Oxfordshire), V. 83, No. 1, 2008, pp. 20-26. doi: 10.1002/jctb.1770
4. Tesárek, P.; Drchalová, J.; Kolísko, J.; Rovnaníková, P.; and Černý, R., “Flue Gas Desulfurization Gypsum: Study of Basic Mechanical, Hydric and Thermal Properties,” Construction and Building Materials, V. 21, No. 7, 2007, pp. 1500-1509. doi: 10.1016/j.conbuildmat.2006.05.009
5. Lee, Y. B.; Bigham, J. M.; Dick, W. A.; and Kim, P. J., “Impact of Flue Gas Desulfurization-Calcium Sulfite and Gypsum on Soil Microbial Activity and Wheat Growth,” Soil Science, V. 173, No. 8, 2008, pp. 534-543. doi: 10.1097/SS.0b013e318182b049
6. Kadam, M. P., and Patil, Y. D., “Effect of Sieved Coal Bottom Ash as a Sand Replacement on the Properties of Cement Concrete,” Magazine of Concrete Research, V. 67, No. 5, 2015, pp. 227-234. doi: 10.1680/macr.14.00179
7. Yazıcı, H., “Utilization of Coal Combustion Byproducts in Building Blocks,” Fuel, V. 86, No. 7-8, 2007, pp. 929-937. doi: 10.1016/j.fuel.2006.10.014
8. Zhong, S. Y.; Ni, K.; and Li, J. M., “Properties of Mortars Made by Uncalcined FGD Gypsum-Fly Ash-Ground Granulated Blast Furnace Slag Composite Binder,” Waste Management, V. 32, No. 7, 2012, pp. 1468-1472. doi: 10.1016/j.wasman.2012.02.014
9. Su, T. X.; Wang, A. M.; Wang, Q. Z.; and Zhao, B., “Non-Fired Desulfurized Gypsum Brick,” State Intellectual Property Office of the People’s Republic of China, 2009, CN101549982. (in Chinese)
10. Yang, D. W.; Zhan, W. G.; Liu, Y.; and Du, M., “Calcination Free Energy Saving Insulating Brick Prepared from Desulfurized Gypsum and Construction Waste,” State Intellectual Property Office of the People’s Republic of China, 2011, CN102515688. (in Chinese)
11. Yang, D. W.; Liu, Y.; Li, Q. H.; and Yao, Y., “Novel Non-Fired Desulfurized Gypsum Brick,” State Intellectual Property Office of the People’s Republic of China, 2011, CN102140027. (in Chinese)
12. Mansur, M. A.; Wee, T. H.; and Lee, S. C., “Crushed Bricks as Coarse Aggregate for Concrete,” ACI Materials Journal, V. 96, No. 4, July-Aug. 1999, pp. 478-484.
13. Pandey, V. C.; Singh, J. S.; Singh, R. P.; Singh, N.; and Yunus, M., “Arsenic Hazards in Coal Fly Ash and its Fate in Indian Scenario,” Resources, Conservation and Recycling, V. 55, No. 9-10, 2011, pp. 819-835. doi: 10.1016/j.resconrec.2011.04.005
14. Pei, G. B.; Wu, J. H.; Chen, W.; and Qin, X. X., “Red-Mud Coal Ash Baking-Free Brick,” State Intellectual Property Office of the People’s Republic of China, 2006, CN101205126. (in Chinese)
15. Fan, G. W.; Zhang, D. S.; and Wang, X. F., “Reduction and Utilization of Coal Mine Waste Rock in China: A Case Study in Tiefa Coalfield,” Resources, Conservation and Recycling, V. 83, Feb, 2014. pp. 24-33. doi: 10.1016/j.resconrec.2013.12.001
16. Su, J. G., and Gong, B. Y., “Colliery Wastes Burn-Free Brick and Production Process Thereof,” State Intellectual Property Office of the People’s Republic of China, 2005, CN1792966. (in Chinese)
17. Yue, Q. Y.; Jiang, T. T.; Wei, Y. Y.; Zheng, H. Y.; Li, W. K.; and Yue, D. T., “A Process of Preparing Non-Fired Bricks from Coal Gangue and Red Mud,” State Intellectual Property Office of the People’s Republic of China, 2014, CN104072069. (in Chinese)
18. Sun, J. S., “Production Process of Red Mud Unburned Brick,” State Intellectual Property Office of the People’s Republic of China, 2007, CN101456703. (in Chinese)
19. Yang, J. K.; Liu, W. C.; Zhang, L. L.; and Xiao, B., “Preparation of Load-Bearing Building Materials from Autoclaved Phosphogypsum,” Construction and Building Materials, V. 23, No. 2, 2009, pp. 687-693. doi: 10.1016/j.conbuildmat.2008.02.011
20. Zhou, J.; Gao, H.; Shu, Z.; Wang, Y. X.; and Yan, C. J., “Utilization of Waste Phosphogypsum to Prepare Non-Fired Bricks by a Novel Hydration-Recrystallization Process,” Construction and Building Materials, V. 34, Sept. 2012, pp. 114-119. doi: 10.1016/j.conbuildmat.2012.02.045
21. ACI Committee 212, “Chemical Admixtures for Concrete (ACI 212.3R-04) (Reapproved 2010),” American Concrete Institute, Farmington Hills, MI, 2004, 30 pp.
22. GB/T14506-2010, “Methods for Chemical Analysis of Silicate Rocks,” Bureau of Quality and Technical Supervision of China, Beijing, China, 2010, 6 pp.
23. GB/T2542-2003, “Test Methods for Wall Bricks,” Bureau of Quality and Technical Supervision of China, Beijing, China, 2003, 16 pp.
24. JC/T422-2007, “Non-Fired Rubbish Gangue Brick,” Bureau of Quality and Technical Supervision of China, Beijing, China, 2007, 5 pp.
25. ACI Committee 211, “Guide for Selecting Proportions for High-Strength Concrete Using Portland Cement and Other Cementitious Materials (ACI 211.4R-93) (Reapproved 2008),” American Concrete Institute, Farmington Hills, MI, 1993, 13 pp.
26. GB/T9966, 3-2001, “Test Methods for Natural Facing Stones,” Bureau of Quality and Technical Supervision of China, Beijing, China, 2001, 3 pp.
27. Stock, A. F.; Hannantt, D. J.; and Williams, R. I. T., “The Effect of Aggregate Concentration upon the Strength and Modulus of Elasticity of Concrete,” Magazine of Concrete Research, V. 31, No. 109, 1979, pp. 225-234. doi: 10.1680/macr.1979.31.109.225
28. Guo, T. M., Application Technology of Industrial By-Product Gypsum, first edition, China Building Materials Industry Press, China, 2010, 4 pp.
29. ACI Committee 308, “Guide to Curing Concrete (ACI 308R-01) (Reapproved 2008),” American Concrete Institute, Farmington Hills, MI, 2001, 30 pp.
30. Mehmet, B., and Tugrul, T., “Experimental Study on Seismic Strengthening of Reinforced Concrete Frames by Precast Concrete,” ACI Structural Journal, V. 108, No. 2, Mar.-Apr. 2011, pp. 227-237.
31. Mariam, F. G., and Mohamed, F. A. E. H., “Optimization of Lightweight Concrete Process by Gray-Taguchi Method,” ACI Materials Journal, V. 112, No. 3, May-June 2015, pp. 365-374.
32. Naik, T. R.; Chun, Y.; Kraus, R. N.; Ramme, B. W.; and Siddique, R., “Precast Concrete Products Using Industrial By-Products,” ACI Materials Journal, V. 101, No. 3, May-June 2001, pp. 199-206.