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Advanced computer methodologies for solving future challenges in engineering and construction
Published in Manuel Martínez, Raimar Scherer, eWork and eBusiness in Architecture, Engineering and Construction, 2020
A third demonstrative example for multi-level/multi-paradigm problems in Civil Engineering is the demolition of complex buildings using controlled explosives. The demolition of building becomes increasingly important besides the erection of new structures and the management of existing infrastructures, for the following reasons: In many suburban densely populated areas there are existing buildings and constructions that reach their expiration of their service life because of insufficient structural quality, changed requirements regarding utilization or simply unacceptable layout. As a consequence, a large number of buildings (departments store, administration buildings, multi-storey buildings etc.) have soon to be demolished.
Best Practices in Construction and Demolition Waste Management
Published in Ashok K. Rathoure, Zero Waste, 2019
As per Construction and Demolition (C&D) Waste Management Rules 2016, construction means the process of erecting of building or built facility or other structure, or building of infrastructure including alteration. As per Construction and Demolition Waste Management Rules 2016, demolition means breaking down or tearing down buildings and other structures either manually or using mechanical force (by various equipment) or by implosion using explosives. As per Construction and Demolition Waste Management Rules 2016, construction and demolition waste means the waste comprising building materials, debris and rubble resulting from construction, remodelling, repair and demolition of any civil structure. Waste is generated at different stages of the construction process. Waste during construction activity relates to excessive cement mix or concrete left after work is over, rejection/demolition caused due to change in design or wrong workmanship and so forth. Construction waste is bulky, heavy and mostly unsuitable for disposal by incineration or composting (Patel et al., 2014).
Demolition
Published in Erik K. Lauritzen, Construction, Demolition and Disaster Waste Management, 2018
Demolition is the general term for a set of actions to remove a structure, building, part of a structure or a building. Depending on the type of structure we might use another term. For example: decommissioning of nuclear facilities, dismantling of offshore structures and deconstruction of special structures or deconstruction of buildings.
Economic feasibility of green office building: combining life cycle cost analysis and cost–benefit evaluation
Published in Building Research & Information, 2021
Perdana Miraj, Mohammed Ali Berawi, Siti Rahma Utami
Several techniques can be used to dismantle the building, consisting of mechanical demolition, deconstruction, and implosion (Pun et al., 2006). The selection of demolition techniques can depend on various factors, including structural condition, site planning, demolition cost, contractor’s previous experience, time allocation, and the likelihood of reuse and recycling of materials/waste (Anumba et al., 2008). Mechanical demolition involves heavy equipment such as excavators and bulldozers, making it the fastest technique with the least labour involved. On the opposite, deconstruction is most preferred when sustainability becomes the primary goal. The method requires some personnel to substantially minimize waste and maintain suitable quality materials for recycling or reuse (C. Liu et al., 2003). However, this technique may require a higher cost of 17–25% than the mechanical one (Dantata et al., 2005). The implosion regarded as a hybrid technique of mechanical and deconstruction makes this technique a compromise option for both cost and environmental reasons.
Environmental life cycle assessment of coarse natural and recycled aggregates for concrete
Published in European Journal of Environmental and Civil Engineering, 2018
Bruno Estanqueiro, José Dinis Silvestre, Jorge de Brito, Manuel Duarte Pinheiro
Once the concrete is mixed, it can be transported to the site and used in the construction of a building. When the service life of the building ends, its demolition originates significant quantities of concrete waste, which is the most important CDW stream, in Portugal and around the world. However, the recycling of this waste and its reuse as aggregates (the coarse fraction – Fonseca, de Brito, & Evangelista, 2011; Barbudo, de Brito, Evangelista, Bravo, & Agrela, 2013 – and the fine fraction – Evangelista & de Brito, 2007b; Pereira, Evangelista, & de Brito, 2012) in new concrete structures can reduce the amount of CDW landfilled, the extraction of natural aggregates and the corresponding environmental impacts (Figure 1) (Martins et al., 2008). Nevertheless, the percentage of CDW in relation to the total use of aggregates is different from country to country, and cannot completely replace the use of natural aggregates in all cases. Selective demolition, which is carried out through careful dismantling of the building, allows the maximum recovery of construction materials and corresponding reuse and recycling.