Analysis of brick wall debris for reusing

Abstract

Purpose: This study aims to demonstrate the final mechanical strength of brick debris and its suitability for reusing. Theory and Methods: Brick wall debris after machinery demolition of an infilled reinforced concrete frame building was analyzed to determine its final condition and possibility of reusability. Obtained wall sections were of double-leaf cavity walls that were cement plastered on one surface while the other surfaces were bare. Bare surfaces were plastered with a suitable plaster according to the reusing proposal and mechanical tests were applied. The compressive strength of brick units was calculated according to TS EN 772-1. Cubic specimens of recovered and added plaster were tested under uniaxial compression according to TS EN 1015-11 and wall sections were tested for initial shear strength according to TS EN 1052-3. Results: Mean compression strength of the bricks was calculated as 6.9 MPa, mean cube equivalent strength of mortar/plaster was calculated as 19.7 MPa and mean initial strength was found as 0.5 MPa. Strength of the new equivalent bricks is between 2.4 and 8.1 MPa, while that of the new mortar is about 21.9 MPa and limit shear resistance in Eurocode 6 is 0.1 MPa. Consequently, the final mechanical values of the wall debris are either within the range of new equivalents or above the allowable limits that is promising for reusing. Conclusion: The need for a database on recovery of debris for reuse was emphasized. Specific ways for typical construction practices such as reinforced concrete or masonry infill elements should be presented there. Similarly, analysis and use of hollow brick debris presented in this current study is intended to be a part of that database.