The characterization and influence of brine sludge on the properties of cement-fly ash-sludge binders are presented. The reaction products formed during the hydration of binder provide an interlocking framework to physically encapsulate the waste particles and are responsible for the development of strength. The utilization of brine sludge in making paver blocks and bricks and the effect of sludge concentration on the engineering properties of these products are also discussed. These results clearly exhibited that brine sludge up to 35 and 25% can safely be utilized for making paver blocks and bricks, respectively. The leachability studies confirm that the metals ions and impurities in the sludge are substantially fixed in the matrix and do not readily leach from there. The utilization of brine sludge in construction materials could serve as an alternative solution to disposal and reduce pollution. 1. Introduction The rapid growth of industrialization in India in the recent years is the striking feature of nation’s economic development. But the other side of industrialization has been the serious damage to the surrounding environment due to the wastes and pollutants generated from the industries. Various chemical, mining, steel, fertilizer, paper, and pulp industries generate huge amounts of wastes out of their production processes. The uncontrolled dumping of these wastes causes irreparable damage to the surface and ground water, air, and soil and has become a matter of serious concern for the protection of environment. Thus, the utilization/recycling of these waste materials are quite desirable for the sustainable development of the economy and for ensuring a clean and safe environment. Attempts have been made earlier to utilize various industrial wastes as an alternative material in the construction industry. Balasubramanian et al. [1] have suggested that the use of textile ETP sludge up to a maximum of 30% substitution for cement may be possible in the manufacture of nonstructural building materials. Several researchers reported that the slag obtained from different sources can be utilized as a supplementary raw material in different construction applications？[2–5]. Saxena et al. ？[6] investigated the use of copper tailings up to 50% in replacement of clay in the manufacture of bricks. Saikia et al. [7, 8] reported that the hydration characteristics of metakaolin-lime system are enhanced by cocalcining kaolin with petroleum ETP sludge and the properties of blended cement are improved by replacing 20% cement with cocalcined kaolin-sludge containing
References
[1]
J. Balasubramanian, P. C. Sabumon, J. U. Lazar, and R. Ilangovan, “Reuse of textile effluent treatment plant sludge in building materials,” Waste Management, vol. 26, no. 1, pp. 22–28, 2006.
[2]
Y. Xue, S. Wu, H. Hou, and J. Zha, “Experimental investigation of basic oxygen furnace slag used as aggregate in asphalt mixture,” Journal of Hazardous Materials, vol. 138, no. 2, pp. 261–268, 2006.
[3]
P. Ahmedzade and B. Sengoz, “Evaluation of steel slag coarse aggregate in hot mix asphalt concrete,” Journal of Hazardous Materials, vol. 165, no. 1–3, pp. 300–305, 2009.
[4]
M. Maslehuddin, A. M. Sharif, M. Shameem, M. Ibrahim, and M. S. Barry, “Comparison of properties of steel slag and crushed limestone aggregate concretes,” Construction and Building Materials, vol. 17, no. 2, pp. 105–112, 2003.
[5]
W. Shen, M. Zhou, W. Ma, J. Hu, and Z. Cai, “Investigation on the application of steel slag-fly ash-phosphogypsum solidified material as road base material,” Journal of Hazardous Materials, vol. 164, no. 1, pp. 99–104, 2009.
[6]
M. Saxena, V. Sorna Gowri, J. Prabhakar, and T. Sangeetha, “Innovative building materials: polymer composites, copper tailing bricks, and blue dust primers,” Civil Engineering & Construction Review, vol. 15, pp. 46–50, 2002.
[7]
N. J. Saikia, P. Sengupta, P. K. Gogoi, and P. C. Borthakur, “Cementitious properties of metakaolin-normal Portland cement mixture in the presence of petroleum effluent treatment plant sludge,” Cement and Concrete Research, vol. 32, no. 11, pp. 1717–1724, 2002.
[8]
N. J. Saikia, P. Sengupta, P. K. Gogoi, and P. C. Borthakur, “Hydration behaviour of lime-co-calcined kaolin-petroleum effluent treatment plant sludge,” Cement and Concrete Research, vol. 32, no. 2, pp. 297–302, 2002.
[9]
“CPCB Report on ‘Review of Environmental standards of Caustic Soda industry (Membrane cell) and preparation of COINDS on Caustic soda’,” 2013.
[10]
F. P. Glasser, “Fundamental aspects of cement solidification and stabilisation,” Journal of Hazardous Materials, vol. 52, no. 2-3, pp. 151–170, 1997.
[11]
A. T. Lima, L. M. Ottosen, and A. B. Ribeiro, “Assessing fly ash treatment: remediation and stabilization of heavy metals,” Journal of Environmental Management, vol. 95, pp. S110–S115, 2012.
[12]
O. D. Whitescarver, J. T. Kwan, M. K. Chan, and D. P. Hoyer, “Process for using sludge from geothermal brine to make concrete and concrete composition,” U.S Patent Number: 4,900,360, 1990.
[13]
D. I. Kaplan, K. Roberts, J. Coates, M. Siegfried, and S. Serkiz, Saltstone and Concrete Interactions with Radionuclides: Sorption (Kd), Desorption, and Reduction Capacity Measurements, United States Department of Energy, Savannah River Site, SC, USA, 2008.
[14]
R. Zentar, D. Wang, N. E. Abriak, M. Benzerzour, and W. Chen, “Utilization of siliceous-aluminous fly ash and cement for solidification of marine sediments,” Construction and Building Materials, vol. 35, pp. 856–863, 2012.
[15]
IS, “Methods of chemical analysis of hydraulic cement,” IS 4032-2005, Bureau of Indian Standards, New Delhi, India, 2005.
[16]
IS: 3812-2003, Specification for Fly ash for Use as Pozzolana and Admixture, Bureau of Indian Standards, New Delhi, India.
[17]
IS, “Methods of test for Pozzolanic materials,” IS 1727-2004, Bureau of Indian Standards, New Delhi, India, 2004.
[18]
“Indian standard methods of test for aggregates for concrete,” IS: 2386-1963, (Part 1, 3, 4), Bureau of Indian Standards, New Delhi, India.
[19]
IS: 4031-2005, Methods of Physical Tests for Hydraulic Cements, Bureau of Indian Standards, New Delhi, India, 2005.
[20]
IS: 6909-2004, Specification for supersulphated cement, Bureau of Indian Standards, New Delhi, India.
[21]
M. Garg and A. Pundir, “Investigation of properties of fluorogypsum-slag composite binders-hydration, strength and microstructure,” Cement and Concrete Composites, vol. 45, pp. 227–233, 2014.
[22]
IS, “Precast concrete blocks for paving-specification,” IS 15658-2006, Bureau of Indian Standards, New Delhi, India, 2006.
[23]
“Fly Ash—lime bricks—specification,” IS: 12894-1999, Bureau of Indian Standards, New Delhi, India.
[24]
IS: 4139-1989, Specification for calcium silicate bricks, Bureau of Indian Standards, New Delhi, India.
[25]
M. Garg and A. Pundir, “Comprehensive study of fly ash binder developed with fly ash—alpha gypsum plaster—Portland cement,” Construction and Building Materials, vol. 37, pp. 758–765, 2012.
[26]
M. Garg, N. Rani, and A. Pundir, “Utilization of steel slag in construction materials,” New Building Materials Construction World, vol. 19, pp. 163–166, 2014.
[27]
ASTM, “Standard test method for shake extraction of solid waste with water,” ASTM D3987-85, ASTM International, West Conshohocken, Pa, USA, 2004.
[28]
IS:10500-2012, Standards for Discharge of Environmental Pollutants in Inland Surface Water, Bureau of Indian Standards, New Delhi, India, 2012.
