Abstract
Coal fly ash (CFA), as a by-product generated from coal fired power stations, is widely used for autoclaved concrete block production. It has been found that the generation of tobermorite is great benefit to the block strength during autoclaving. In this study, the tobermorite fibers synthesized from CFA and lime via the hydrothermal process are used as the revulsive to promote the mechanic strength of the concrete blocks. The results show that tobermorite fibers with 0.01–0.5 μm in diameter and 1–3 μm in length are obtained at 200 °C for 0.2 h. As the addition of prepared tobermorite fibers increases from 0 wt% to 2.0 wt%, the compression strength of concrete block increases from 24.6 to 40.5 MPa, and the compression strength of aerated concrete block produced under the optimized conditions can reach above 7.5 MPa.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsReferences
Blissett RS, Rowson NA (2012) A review of the multi-component utilization of coal fly ash. Fuel 97:1–23
BP Statistical Review of World Energy (2007). http://www.bp.com/content/dam/bp/en/corporate/pdf/energy-economics/statistical-review-2017/bp-statistical-review-of-world-energy-2017-full-report.pdf. Accessed June 2017
Bentz DP, Ferraris CF, Varga IDL, Peltz MA, Winpigler J (2010) Mixture proportioning options for improving high volume fly ash concretes. Int J Pavement Res Tech 3:234–240
Bentz DP, Hansen AS, Guynn JM (2011) Optimization of cement and fly ash particle sizes to produce sustainable concretes. Cem Concr Compos 33:824–831
Donatello S, Palomo A, Fernández-Jiménez A (2013) Durability of very high volume fly ash cement pastes and mortars in aggressive solutions. Cem Concr Compos 38:12–20
Naganathan S, Mohamed AYO, Mustapha KN (2015) Performance of bricks made using fly ash and bottom ash. Constr Build Mater 96:576–580
Çicek T, Çinçin Y (2015) Use of fly ash in production of light-weight building bricks. Constr Build Mater 94:521–527
Coleman NJ, Brassington DS, Raza A, Mendham AP (2006) Sorption of Co2+ and Sr2+ by waste-derived 11 Å tobermorite. Waste Manag 26:260–267
Reinik J, Heinmaa I, Kirso U, Kallaste T, Ritamäki J, Boström D, Pongrácz E, Huuhtanen M, Larsson W, Keiski R, Kordás K, Mikkola JP (2011) Alkaline modified oil shale fly ash: Optimal synthesis conditions and preliminary tests on CO2 adsorption. J Hazard Mater 196:180–186
Tsutsumi T, Nishimoto S, Kameshima Y, Miyake M (2014) Hydrothermal preparation of tobermorite from blast furnace slag for Cs+ and Sr2+ sorption. J Hazard Mater 266:174–181
Ding J, Tang Z, Ma S, Wang Y, Zheng S, Zhang Y, Shen S, Xie Z (2016) A novel process for synthesis of tobermorite fiber from high-alumina fly ash. Cem Concr Compos 65:11–18
Chen M, Lu L, Wang S, Zhao P, Zhang S (2017) Investigation on the formation of tobermorite in calcium silicate board and its influence factors under autoclaved curing. Constr Build Mater 143:280–288
Li G, Zhang J, Luo J, Chen H, Zeng J, Jiang T (2012) Preparation of tobermorite whisker from sodium silicate solution. J Chin Ceram Soc 40:1721–1727 (In Chinese)
Luo J, Li G, Jiang T, Peng Z, Rao M, Zhang Y (2016) Conversion of coal gangue into alumina, tobermorite and TiO2-rich material. J Cent South Univ 23:1883–1889
Li G, Jiang T, Peng Z et al (2016) A method of synthesizing tobermorite fibers using coal fly ash as raw material. Chinese patent: CN 105780121A, 20 Juy 2016 (in Chinese)
Acknowledgements
The authors wish to express their thanks to the National Natural Science Foundation of China (Nos. 51234008 and 51174230) for the financial support of this research. This work was also financially supported by Co-Innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 The Minerals, Metals & Materials Society
About this paper
Cite this paper
Cao, P., Luo, J., Li, G., Dong, Y., Rao, M., Peng, Z. (2018). Utilization CFA-Derived Tobermorite Fiber as Crystallization Revulsive in Autoclaved Concrete Block Production. In: Sun, Z., et al. Energy Technology 2018 . TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72362-4_23
Download citation
DOI: https://doi.org/10.1007/978-3-319-72362-4_23
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-72361-7
Online ISBN: 978-3-319-72362-4
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)