Ali Bahadori-Jahromi

By Yakubu Mustapha Karkarna, Ali Bahadori-Jahromi, Hamid Zolghadr Jahromi, Emily Halliwell and Musab Mohammad Rabi

In the design of reinforced concrete structures, the bond property is crucial. This is important for achieving the composite action between the two materials constituents, allowing loads to be efficiently transmitted. The higher strain hardening and ductility capacity of stainless steel over mild steel are one of its major benefits. International design codes, such as Eurocode 2, do not provide a separate design model for concrete structures with stainless reinforcing bars. The background paper to Eurocode 2 highlighted that there is no technical reason of why the Eurocode 2 design model cannot be used in conjunction with other types of reinforcement, provided allowance is made for their properties and behaviour. While this notion is valid when using a mild steel reinforcing bar, it produces erroneous results when a stainless reinforcing bar with a lap splice is used in a reinforced concrete section. Even though there has been a large number of studies on the behaviour of structure with stainless steel in recent years, most of it has been on plain stainless-steel members rather than reinforced concrete or stainless-steel reinforced concrete with lap splice. As a result, the purpose of this chapter is to evaluate and compare the behaviour of stainless and mild steel reinforced concrete with and without lap splices.

Part of the book: Reinforced Concrete Structures

By Augustine Blay-Armah, Ali Bahadori-Jahromi, Golnaz Mohebbi and Anastasia Mylona

Building demolition waste represents a huge environmental challenge worldwide. The environmental implications are not only associated with volume, but also with carbon embodied in the waste. These adverse environmental impacts associated with the generated waste can be minimised through appropriate waste treatment strategies. This chapter evaluates the various stages of the life cycle of demolished waste materials, the potential carbon emission reduction associated with different demolished wastes and waste treatment strategy options. An assessment framework was developed and exemplified by a case study of a supermarket building. The results showed that the processing or treatment stage generate the largest amount of carbon emission (81%) in the life cycle of demolished waste materials, whilst the transportation stage contributed the least (1%). It was further found that steel waste recycling has the greatest environmental benefits (more than 90%) compared to concrete (less than 1%). Additionally, the study revealed that landfilling waste generated the largest amount of carbon emissions compared to recycling. The findings can contribute to mitigating the environmental building demolition projects. Furthermore, the detailed assessment approach provides theoretical and methodological guidance which can be adopted to guide the quantitative analysis of other types of demolition projects globally.

Part of the book: Life Cycle Assessment