Experimental Study on Cementitious Reactivity of MSTP Sludge Incineration Ash

Abstract:

One of the main objectives of this study was to activate the pozzolanic activity of sludge, produced by municipal sewage treatment plants (MSTP), which makes it become an admixture to replace a part of cement in cement-based materials. Nowadays, a significant quantity of MSTP sludge is obtained in China, and the disposal of sludge presents a rising challenge for the environment, which is the reason why this paper examines the possibility of adding this waste product to cement-based materials. MSTP sludge was activated by thermal (Incineration) and mechanical (Grinding) treatment. Meanwhile, the changes in the crystalline structure of MSTP sludge incineration ash (MSA) were evaluated using X-Ray Diffraction (XRD), and mortar strength tests were carried out on the mortars containing MSA to investigate the reactivity of the produced materials. The obtained results revealed that the optimal activation conditions of MSA were as follows: incinerated at 800°C for 2.5 hours followed by fast cooling in air and then ground until 60 minutes. Moreover, we have observed that MSA has an appreciable effect on the increase in compressive strength of the mortars and using of 20% MSA as a replacement of part of cement could be considered the optimum content. More importantly, the tests showed that extract toxicity of heavy metals in MSA were much lower than the national standard though some heavy metals existed in MSA. These results demonstrate the feasibility of recycling MSTP sludge has become an admixture in cement-based materials for construction engineering.

• Periodical: Advanced Materials Research (Volumes 838-841)
• Pages: 175-182
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.838-841.175
• Online since: November 2013
• Authors: Dong Ouyang, Liu Lei Lu*, Xi Lian Wen
• Keywords: Cementitious Reactivity, Compressive Strength, Mortar, MSTP Sludge

References

[1] W.D., Li, M., Li, W.F., Liu, H.F. Study on the ash fusion temperatures of coal and sewage sludge mixtures. Fuel, 2010; 89(7): 1566-72.

DOI: 10.1016/j.fuel.2009.08.039

[2] Alina S, Maria S, Ola H. Energy use and recovery strategies within wastewater treatment and sludge handling at pulp and paper mills. Bioresour Technol 2009; 100(14): 3497–505.

DOI: 10.1016/j.biortech.2009.02.041

[3] Walid BA, Noureddine G, Abdelbasset L, Gijs DL, Marc V, Naceur J, et al. Effect of 5-year application of municipal solid waste compost on the distribution and mobility of heavy metal sin a Tunisian calcarrous soil. Agric Ecosyst Environ 2009; 130: 156–63.

[4] Conesa JA, Marcilla A, Prats D, Pastor MR. Kinetic study of the pyrolysis of sewage sludge. Waste Manage Res 1997; 15(3): 293–305.

DOI: 10.1177/0734242x9701500307

[5] Konar SM, Boocock DGB, Mao V, Liu J. Fuels and chemicals from sewage sludge: 3. hydrocarbon liquids from the catalytic pyrolysis of sewage sludge lipids over activated alumina. Fuel 1994; 73(5): 642–8.

DOI: 10.1016/0016-2361(94)90002-7

[6] Ferrasse JH, Seyssiecq I, Roche N. Thermal gasification: a sensible solution for sewage sludge valorization. Chem Eng Technol 2003; 26: 941–5.

DOI: 10.1002/ceat.200301813

[7] S. Valls, A. Yagüe, E. Vázquez, C. Mariscal, Physical and mechanical properties of concrete with added dry sludge from a sewage treatment plant, Cement and Concrete Research 2004; 34(12): 2203-8.

DOI: 10.1016/j.cemconres.2004.02.004

[8] D.J. Lisk, Compressive strength of cement containing ash from municipal refuse or sewage sludge incinerators, Bulletin of Environmental Contamination and Toxicology 1989; 42 (4): 540–543.

DOI: 10.1007/bf01700234

[9] J.I. Bhatty, K.J. Reid, Compressive strength of municipal sludge ash mortars, ACI Materials Journal 1989; 86 (4): 394–400.

DOI: 10.14359/2170

[10] S.C. Pan, D.H. Tseng, C. Lee, Use of sewage sludge ash as fine aggregate and pozzolan in Portland cement mortar, Journal of Solid Waste Technology and Management 2002; 28 (3): 121–130.

[11] YU Rui, YE Qing, YE Wen, Study and Measurement on the Use of Urban Sewage Sludge as Building Materials, China Water & Wastewater 2004; 20(11): 1-5 [in Chinese].

[12] V. Pinarli, in: R.K. Dhir, et al., (Eds. ), Sustainable Waste Management—Studies on the Use of Sewage Sludge Ash in Construction Industry as Concrete Material, Sustainable Construction: Use of Incinerator Ash, Thomas Telford, London (UK), 2000: 415–426.

DOI: 10.1680/uoia.28616

[13] C.M.A. Fontes, M.C. Barbosa, R.D. Toledo Filho, J.P. Goncalves, Potentiality of sewage sludge ash as mineral additive in cement mortar and high performance concrete, International RILEM Conference on the Use of Recycled Materials in Buildings and Structures, 8–11 November 2004, Barcelona, Spain, 2004: 797–806.

[14] Cyr M, Coutand M, Clastres P. Technological and environmental behavior of sewage sludge ash (SSA) in cement-based materials. Cement and Concrete Research 2007; 37(8): 1278-1289.

DOI: 10.1016/j.cemconres.2007.04.003

[15] Vizcayno C, de Gutiérrez RM, Castello R, Rodriguez E, Guerrero CE, Pozzolan obtained by mechanochemical and thermal treatments of kaolin, Applied Clay Science 2010; 49(4): 405-13.

DOI: 10.1016/j.clay.2009.09.008

[16] S. Su, P.S. Li, X.X. Sun, M. Li, S. Hu, Thermogravimetric study on basic characteristics of sewage sludge and it's mix burning performance with coal, Thermal Power Generation 2004; 09: 69-74.

[17] Husillos Rodríguez N, Martínez-Ramírez S, Blanco-Varela MT, et al. Evaluation of spray-dried sludge from drinking water treatment plants as a prime material for clinker manufacture. Cem Concr Compos 2011; 33(2): 267–75.

DOI: 10.1016/j.cemconcomp.2010.10.020

[18] El-Dakroury A, Gasser M S. Rice husk ash (RHA) as cement admixture for immobilization of liquid radioactive waste at different temperatures [J]. Journal of Nuclear Materials 2008; 381(3): 271-7.

DOI: 10.1016/j.jnucmat.2008.08.026