Utilization of Recycled Materials in Infrastructure Projects: Ashghal Approach
الملخص
As a result of numerous infrastructure projects which have taken place in Qatar in the last decade, there has been an unprecedented increase in demand for construction materials. In addition, the huge program of infrastructure development has led to production of massive quantities of construction waste. Consequently, the Public Works Authority of Qatar (Ashghal) launched an initiative to use recycled materials in projects in line with Qatar National Vision 2030 and Qatar National Development Strategy 2018 - 2022. A roadmap was developed in 2018 considering the available resources and experiences. Recyclable materials which can be used in Ashghal projects were identified. Excavation waste, demolition waste, Reclaimed Asphalt Pavement (RAP), Wadi Aggregate, Crumb Rubber and Steel Slag were selected for reuse. Controlled logistic areas to store, manage and process recyclable materials were established. Moreover, guidelines and prequalification procedures were developed for both materials sources and recycled materials producers. Testing programs were carried out on these materials to identify their basic characteristics. Laboratory trials and field trials were carried out at selected projects. Field trials were monitored and assessed using the local construction specifications QCS 2014. Based on lab and field trials, customized specifications were developed for the utilization of the selected recyclable materials in Ashghal projects. These specifications establish the baseline for construction using the selected recycled materials and determine the criteria and methods needed for quality control. Furthermore, Key Performance Indicators (KPIs), were established for Ashghal project departments to monitor their performance in relation to recycling. Ashghal's phenomenal performance in utilization of recycled materials in the last three years is presented.