1.1. Background
The basis of this book stems from years of active research undertaken in close collaboration with the construction industry from 1988 onwards, involving small-to medium-sized enterprises, national/multinational companies and government departments and a commitment to the dissemination of knowledge, as well as active and decisive involvement in promoting sustainability and the use of waste materials in the construction sector.
The work has involved undertaking of carefully planned and focused research to address some of the most challenging issues over the years, including sustainability in construction in general (Whyte et al., 2005); the sustainable use of natural resources to reduce CO2 emissions, for example, by reducing the cement content of concrete mixes across all strength grades (Dhir and Hewlett, 2008; Dhir et al., 2000, 2004a, 2006); and the recycling of waste materials to conserve natural resources (Limbachiya et al., 2000; Dyer and Dhir, 2001; Paine et al., 2002; Dhir, 2006; Dyer et al., 2006; Paine and Dhir, 2010a).
Of particular note, an outreach programme was launched to share and transfer knowledge, in the form of organised seminars, workshops and conferences, during the period of 1988ā2008 (Dhir and Green, 1990; Dhir et al., 2008, 2015), and in doing so, a centre for the advancement of small-to medium-sized enterprises in the construction sector was established. This also included the initiation of the globalisation of concrete research and the formation of the UKāIndia (Newlands and Dhir, 2011) and IrelandāIndia research collaboration groups in 2008 and 2012, respectively, and the establishment of the UKIERI Concrete Congress in 2013 (Dhir et al., 2013, 2015).
Working at the forefront of cutting-edge research, in close partnership with a wide industrial base, also brought to light the fragmented and therefore often ineffective nature of the research that has generally been undertaken. Indeed, in the area of sustainable construction materials, this has stifled the rate of progress in realising the potential for greater adoption of these materials. As a response to this, a new approach to research, analytical systemisation, has been developed to bring together and analyse and evaluate the published data in the global literature, to better understand and utilise the information.
Using this analytical systemisation method, the following selected successful comprehensive studies have been published:
ā¢ A study undertaken by Silva et al. (2014a) has provided a method for classifying recycled aggregates derived from construction demolition waste for use in concrete, which could help with their certification and boost stakeholdersā confidence in their use. The same authors have produced a series of further studies assessing the effects of using recycled materials in concrete and geotechnical applications (Silva et al., 2014b, 2015a,b,c, 2016a,b).
ā¢ A series of studies aimed at assisting the design engineer in adopting the use of sustainable construction materials, within the framework of existing design codes such as Eurocode 2 (2004), has been published by Lye et al. (2015a, 2016a,b,c, 2017). This work assessed the effects of coarse recycled concrete aggregate, glass cullet as a fine aggregate and copper slag as a fine aggregate on the modulus of elasticity, creep and shrinkage of concrete.
ā¢ On the carbonation, chloride ingress and associated corrosion of steel reinforcement in concrete made with cement incorporating fly ash, ground granulated blast furnace slag and limestone, complying with European Standard EN 197-1 (2011), the analysis and evaluation of global data have revealed some challenging facts about the performance of concrete and the accompanying impacts on sustainability that had hitherto not generally been appreciated (Lye et al., 2015b, 2016d; Elgalhud et al., 2017a,b).
ā¢ Similarly, in the area of incinerated ashes, a series of studies has been undertaken using the analytical systematisation method in characterising sewage sludge ash and municipal incinerated bottom ash and assessing their environmental impacts and potential for use as components of cement or aggregate in mortar and concrete, in geotechnics, in road pavements and in ceramic applications (Lynn et al., 2015, 2016a,b,c, 2017a,b).
The analytical systematisation method is proving to be increasingly powerful in analysing and evaluating globally published experimental data on recycled and secondary materials, in terms of characterising the materials and establishing their potential applications and engineering performance across disciplines, as well as addressing the important environmental impacts and sustainability issues. This approach has been adopted in developing a series of five books on sustainable construction materials, and the first and second, dealing with copper slag (Dhir et al., 2016a) and sewage sludge ash (Dhir et al., 2016b), respectively, have been published.
This work, the third in the series, dealing with municipal incinerated bottom ash (MIBA), should serve as a useful resource for academics, researchers and practitioners, providing an up-to-date, comprehensive view of the research undertaken on MIBA and its use in construction, concrete, geotechnics, road pavements and ceramic applications, as well as the associated environmental impacts, case studies and issues related to standards and specifications. Of equal importance, this work should help to reduce wasteful repetitive studies and also potentially spark new ideas and useful projects in areas of need.