CHERACTERIZATION OF LIME SLUDGE WASTE AND ITS UTILIZATION IN BUILDING PRODUCTS

Abstract

The strict management regulations and the eye on ecosystem make all the industries to find innovative applications of their generated waste to he utilised in various oilier industrial applications as secondary raw materials. Lime sludge is one of their kinds produced majorly in paper industries seeks such utilisation. In different two experimental investigations, The OPC (ordinary portland cement) and fine aggregate have been partially substituted by lime sludge by wt. % of cement and fine aggregate respectively. The mixture of concrete of lime sludge, fine aggregate, cause aggregate. ordinary portland cement, water were prepared by using standard consistency method as per IS: 10262-2009. Different concrete mixes were prepared with water to binder W/(C+LS) ratio for target strength of 37 (N/mm2). The cubes of concrete were made by using lime sludge, fine aggregate, coarse aggregate, and cement in the varying proportions. For getting good strength the super plasticizer also used. The dimensions of cubes were 1 00mm X 100mm X 100mm, The casted cubes were treated for moist curing for the duration of 24 Ii and alter that cubes were put into the curing tank that was filled with fresh water. An increase in the compressive strength of the cubes of concrete was observed with the replacement of lime sludge of pulp and paper mill over the control cement cube concrete. The maximum gain in the strength properties of the concrete was achieved at I 0% substitution of cement and 25 % substitution of line aggregate with lime sludge. Utilization of these wastes have been great impact to reduce environmental load in last decades and further these may be used as supplementary cementitious materials as building products.