Abstract
One of the key emerging trends to protect the environment is to reuse wastes generated from construction and demolition sites for various engineering purposes. Many studies are being developed for setting up and optimize the potential of recycled construction wastes. The aim of the paper is to estimate the degree of improvement for resistance parameters of soil mixed with 5% and 10% of concrete and brick and water-based polymeric suspension used as stabilizer agent, as well as drywall waste mixed with 5% eco-binder with puzzolanic character. Multiple options of mixtures, predominantly composed by clay soils with swelling potential, have been investigated in laboratory conditions in terms of compression strength at 7, 14 and 28 days curing time and deformability. In order to emphasize distinct benefits of tested mixtures, a comparative analysis of the parametric values has been achieved. The experimental results revealed the suitability of using construction wastes to be assimilated with natural or conventional materials, which leads to significant improvements rates of geotechnical parameters. A large-scale implementation of this type of practice can substantially contribute to the achievement of sustainable development targets by reusing construction waste according to the specific objectives of engineering works in terms of structure safety.
Highlights
According to recent statistics on development of waste management, building materials account approximately 25%-30% of all waste generated in the EU
The Directive 2008/98/EC on waste includes specific provisions for the Member States to take the necessary measures designed to be achieved by 2020, including a minimum of 70% shall be prepared for re-use, recycling and other recovery of construction and demolition waste (CDW)
There is a high potential for recycling and re-use of CDW in roads, drainage and other construction projects [2, 3], it should be mentioned that several barriers were identified, such as lack of standardisation, awareness and resources, and the process of re-use and recycling is considered to be slow-acting
Summary
According to recent statistics on development of waste management, building materials account approximately 25%-30% of all waste generated in the EU. This waste category, with huge negative impact on the environment, comes from different activities such as the construction of buildings and civil infrastructure, total or partial demolition of buildings and civil infrastructure, road planning and maintenance and consists of various materials, such as concrete, bricks, gypsum, wood, glass, metals, plastic, excavated soil, etc. There is a high potential for recycling and re-use of CDW in roads, drainage and other construction projects [2, 3], it should be mentioned that several barriers were identified, such as lack of standardisation, awareness and resources, and the process of re-use and recycling is considered to be slow-acting
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