Study on self-healing properties in mortar by partial replacement of construction debris as a fine aggregate

Abstract

Construction debris is the waste materials obtained during demolition of structures. These construction debris require a large land area for disposal. In addition to that, the existence of harmful pathogens in the structure reduces the lifetime of the building. The debris waste can be castoff in the construction instead of disposal and the harmful pathogens can be destroyed by using the self-healing method. Construction debris are used as recycled fine aggregate in addition to titanium oxide (TiO2). The self-healing mortar has been prepared with a chemical compound TiO2. It has been used against the pathogens. The strength parameter has been analysed from the compression test. The various proportions of mortar such as 1:3, 1:4, and 1:5 have been taken. The debris was added at 25%, 50%, 75%, and 100% respectively. The optimum strength was achieved at 25% of recycled fine aggregate. In the case of self-healing mortar, the best results achieved for 1:4 proportion with 6% TiO2added in the mix. The highest compressive strength the mix is 9 N/mm2.