Prediction of the compressive strength of concrete made by recycled coarse aggregate derived from selective demolition

The utilization of Recycled Coarse Aggregate (RCA) in concrete has gained signifi-cant traction due to its environmental and economic advantages. However, ensuring the quality of RCA poses challenges as it is influenced by various unpredictable factors includ-ing the high water absorption of RCA, ineffective recycling processes, and the presence...

A predictive model of concrete compressive strength based on level of contamination of coarse aggregate: Experimental study and relation to the water absorption of the coarse aggregate

Recycled aggregate concrete is emphasized more and more nowadays due to its importance towards the construction industry and general welfare of our planet. Being such a significant feature with regard to universal sustainable development, every aspect of its properties should be evaluated, examined and optimized so that there is a well-known,...

Measuring the circularity of modular units in modular construction projects

With the acceleration of global urbanization, most of us will live in cities in the future. As the urban population grows, the shortage of residential buildings has become a more and more severe problem. In response to the rising demand for housing, more and more builders in Europe, East Asia, Australia and other places have begun to adopt a...

Passive scrap singulation for demand-driven sorting

Aluminium is a vital component of the world's economy, thanks to its versatile applications. However, the environmental impacts of primary production result in a growing desire and societal pressure to develop more efficient recycling techniques. Secondary aluminium is produced at 5% of the energy consumption used to produce primary aluminium....

Development of a building adaptability indicator to encourage designing adaptable high-rise buildings: A study to the development of a building adaptability measurement tool

Policy makers have set the goal to reach a completelycircular economy by the year 2050 in the Netherlands. This means that theconstruction industry should shift from its current ‘take-make-waste’ approachtowards a circular approach. The number of buildings of more than 100 m inheight are increasing in the Netherlands, due to...

The incentives for and the problems faced in aluminium recycling: A case study of the process of singulation for aluminium scrap of 50-180 mm size range

Aluminium recycling is a crucial process when it comes to recycling of metals. To make the metal industry part of a circular economy, this process must be efficient and for the interest of companies it should be economical. Singulation is such a process which does both the tasks. In this work, aluminium scrap recycling has been positioned as a...

The impact of recycled cement paste in the development of sustainable mortar

Nowadays environmental issues like the depletion of the natural resources and the pollution of the environment have led many researchers to make new projects about the reuse of waste from construction and demolition again in concrete industry. Among available solutions are the partial replacement of cement with recycled ultrafine particles (RUP)...

Ammonia recovery from calciner off-gas: The effect of reclaiming ammonia by direct injection into the plant system

Ammonia has been recognized as an effective leaching agent in hydro-metallurgical processes for the recovery of metals\cite{AmmLeach2013}. These processes result in ammonia-metal crystals, whereby in the last step, water and ammonia are removed from the crystals by a calcination process. In the past, the vaporized ammonia is considered a waste...

Circular Economy of Mechanical Recycled Post-Consumer PP

Background: The growth of the global population in combination with technological development results in the need to improve the living conditions. This led to a significant and unsustainable increase in production of products. The unstable increase is especially the case for plastics, which have an annual worldwide production of over 288...

Recycling of flexible packaging using a sink-float method

The European Commission proposed to increase recycling of packaging to 80% by 2030. This undermines the goal of a resource efficient Europe, because this may lead to the substitution of flexible packaging with the relatively easy to recycle rigid packaging. Developing a feasible method to separate materials in flexible packaging can contribute...

Recovery of rare earth elements from flat-panel displays with micro-magnetic density separation technique

This report introduces a method for the separation of fine particles (45-125 µm), based on the density of these particles. The driving force behind this research is the desire to extract indium from a waste stream of flat panel displays (FPD). During the processing of the FDPs, dust is generated which contains a significant amount of indium....

Electromagnetic detection of metals in waste materials

The aim of this study is to detect and count metal particles in the flow of bottom ash product after separation by the eddy current separator. By counting, the grade of the material can be determined if the average particle mass is known. The focus of this study is on electromagnetic detection of ferrous and non-ferrous metals. By several...

Initial testing of the Bottom Ash Crusher

In days of resource scarcity recycling ferro and non-ferro metals is key. Not only the environment will profit, but there is economic incentive in these metals. Within the 20 Mton of bottom ash that is produced in Europe there resided 500 Kton of precious non-ferro, worth 500 million euro. But liberating is still not evolved. Using current...

Pebble milling of crushed concrete fines

Concrete is the most commonly used building material in our time. For every person on earth, more than one cubic meter of concrete is produced every year. Cement is the main feedstock for the production of concrete. Cement makes up about 15% of the mass of concrete. The consumption of concrete will grow in the coming decennia [2]. Beside these...