Framework for Adaptability of Deconstruction for Sri Lankan building construction projects S.T.Kulathunga 1# and W.N.Kaumudi 2 1 Student, Department of Quantity Surveying, Faculty of Built Environment and Spatial Sciences (FBESS), General Sir John Kotelawala Defence University (Southern Campus), Sri Lanka 2 Lecturer, Department of Quantity Surveying, Faculty of Built Environment and Spatial Sciences (FBESS), General Sir John Kotelawala Defence University (Southern Campus), Sri Lanka # <36-qs-0010@kdu.ac.lk> Abstract— The Construction Industry is becoming more circular by decreasing waste, reusing construction materials, and embracing regenerative energy generation and biodiversity conservation solutions for energy generation and biodiversity conservation. The effects of circularity on building operations are complex, needing a thorough examination of the implications before deciding on the best course of action. Deconstruction is the methodical demolition of a structure to enable the recovery of its building materials and components, hence encouraging their reuse and recycling at the End-of-life of a building. Deconstruction, meanwhile, is still an uncommon practice in Sri Lanka. However, as a developing country, this deconstruction technique could be a potential solution to minimize the amount of waste transported to landfills. By promoting local economic development, providing employment, and training possibilities, and saving natural resources by diverting materials from landfills, deconstruction can greatly reduce the national solid waste burden placed on the environment by the Construction Industry. The research findings revealed the main enablers, barriers, and solutions of Deconstruction as well as the strategies for the design process, with the goal of ensuring a fruitful management of Deconstruction process implementation for Sri Lankan Building construction projects. Since this concept is still in the implementation stage in Sri Lanka and lack of construction expertise related to that area, therefore, the research apprehends a qualitative approach inclusive of one expert interview rounds adhering to the manual content analysis for data analysis. At the end summary and a conclusion are provided and an insight on prospective future research and application areas follows this. Keywords – Deconstruction, Circular Built Environment, End-of-Life, Adaptability, Sri Lanka I. INTRODUCTION Billions of tons of Construction and Demolition waste (CDW) are dumped in landfills around the world, harming society, the economy, and the environment. (Chileshe et al., 2018; Tam & Lu, 2016). Sri Lanka is an island nation in development with about 21 million people. Municipal garbage creation has expanded significantly over the past few decades due to fast urbanization and population growth. Today, Sri Lanka produces an average of 7000 megagrams (mg) of solid waste each day, with the Western Province accounting for about 60% of the country's total production (Samarasinghe et al., 2021). According to evidence, demolition activities produce more than 50% of all Construction and Demolition waste (O. Akinade et al., 2020). State and municipal governments reduce the amount of buried or incinerated solid waste as significantly as possible, and salvaging reusable and recyclable building materials throughout a procedure called ‘deconstruction’ is rapidly becoming an attractive alternative (Hatamiya, 2006). The usage of salvaged materials that can replace the use of virgin materials is a recent trend in the construction industry. This can reduce environmental impact in terms of energy consumption, pollution, waste disposal, and global warming. Some efforts have also been made to utilize the waste produced by the demolition of structures (Maurya & Malviya, 2021). Also the cost of construction materials has increased. Additionally, modernization and industry have produced a significant amount of CDW. A significant amount of this waste is produced when an old construction work is demolished (Behera et al., 2014). Circular economy is an economic system which replaces the “End-of-Life” concept; a stage of any product that does not receive continuous assistance because it has reached the end of its useful life or because existing processes have been discontinued or alternatively reusing, recycling, and recovering materials in the production/distribution and consumption processes (Ginga et al., 2020). For the Sri Lankan context, strategies can be adapted for the usage of CDW for Deconstruction. With the current situation and financial crisis arising in SL, the country could not be having enough financial funds, technology, machinery, and professionals to execue this concept. But once adopted, it will be a revenue-generating opportunity in the long term for the construction industry and additional costs and can still provide significant environmental benefits. Despite the fact that significant studies have created frameworks, models, and procedures to reliably estimate the recycling potential of CDW materials (Hoang et al., 2020), adopting those techniques to Sri Lankan practices is scarcely specified. The Aim of this article is to