Abstract
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.
Highlights
The rapid growth of industrialization in India in the recent years is the striking feature of nation’s economic development
The determination of compressive strength provides a measure of the binding strength of cement to the waste and is one of the important indices to evaluate the quality of the solidified product for application in construction materials
Data shows that the compressive strength increased with the increase in hydration period in all compositions and maximum strength was achieved for the mix composition B2
Summary
The rapid growth of industrialization in India in the recent years is the striking feature of nation’s economic development. The other side of industrialization has been the serious damage to the surrounding environment due to the wastes and pollutants generated from the industries. 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 [2,3,4,5]. 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 up to 30% sludge
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