Are the inputs and outputs required for conducting LCA of concrete is taken from literature or we have any database like ecoinvent that provide us with the data (inflow and outflow of processes) for conducting LCA especially for Pakistan?
In the LCA research, local data should be used wherever possible to ensure that the life cycle inventory (LCI) is representative of the current situation. For the inputs and outputs of concrete, it's better to gather them from the production process of concrete, LCA database, and previous literature. For the software and database, you can try to find the data in ecoinvent, gabi, and simapro. However, the data provided by these software databases cannot cover all regions, and some missing data can also be obtained from the literature.