Published Paper Details:

Due to growing environmental awareness, as well as stricter regulations on managing industrial waste, the world is increasingly turning to researching properties of industrial wastes and finding solutions on using their valuable component parts so that those might be used as secondary raw material for other industrial applications. Lime sludge production is a by-product of paper making in the paper mill industries. To date, these by-products are being used in other industrial branches and in the field of civil constructions, such as in cement manufacturing along with clinker and in masonry work for civil works. Considering the specificity of physical and chemical properties of lime sludge and a series of possibilities for its use in concrete, this research work demonstrates the possibilities of using lime sludge as partial replacements of cement in concrete. This research work presents an investigation of different properties of materials used for mix design. Quality tests were conducted to check the suitability of material for mix design. Mix design was done according to IS guidelines and the result of it was 1:1.62:3.40. The objective of the study is to check the compressive strength of concrete by adding lime sludge as partial replacement of cement in various percentages. In this work 20% cement has been replaced by five proportions of lime sludge. The five proportions are (0% Lime sludge), (5% Lime sludge), (10% Lime sludge), (15 % Lime sludge) & (20% Lime sludge). It has been observed from the 3, 7 & 28 days tests of compressive strength of concrete that compressive strength decreases as the percentage of lime sludge increases in the mix when compared with controlled concrete. The compressive strength, analysis carried out in this work gives a deeper insight into the cementitious properties and pozzolanic behaviour of such by-products when used for construction purposes. The results show that the strength properties of concrete vary significantly when cement is partially replaced by lime sludge.