Department of Civil Engineering, Birla Institute of Technology and Science Pilani, Hyderabad, India.
Waste Manag Res. 2021 Feb;39(2):279-290. doi: 10.1177/0734242X20945375. Epub 2020 Aug 13.
As stated in the European Commission's waste framework directive, the geographic proximity of wastes to the potential recovery/disposal site is of paramount importance in attaining an effective resource recycling paradigm. The global interest in achieving an end-of-waste scenario encourages the recovery of useful products/secondary raw materials from locally available waste materials. Sugarcane bagasse ash is an abundantly available waste (44,200 tonnes day) from sugar plants in India which has the potential to be used as a partial replacement to cement in ready-mix concrete plants. Although pozzolanic performance of sugarcane bagasse ash and its ability in reducing the carbon emissions associated with concrete production have been reported in earlier research studies, its use in concrete is hindered due to the lack of availability and accessibility data. In this study, the geographical distribution of sugar plants and the available quantity of sugarcane bagasse ash in India have been determined. In addition, a detailed network analysis using a geographic information system was conducted to quantify the geographic proximity of bagasse ash, fly ash and slag sources to ready-mix concrete plants. The study results indicate that for most of the ready-mix concrete plants in India, the probability of having a bagasse ash source in proximity is higher than the probability of encountering slag/fly ash sources.
如欧盟委员会的废物框架指令所述，在实现有效的资源回收模式方面，废物与潜在回收/处置地点的地理接近度至关重要。全球对实现“废物无终点”情景的兴趣鼓励从当地可用的废物材料中回收有用的产品/二次原材料。甘蔗渣灰是印度糖厂大量存在的一种废物（44200 吨/天），具有在预拌混凝土厂中部分替代水泥的潜力。尽管早期的研究报告已经报道了甘蔗渣灰的火山灰性能及其在减少与混凝土生产相关的碳排放方面的能力，但由于缺乏可用性和可及性数据，其在混凝土中的使用受到阻碍。在这项研究中，确定了印度糖厂的地理分布和甘蔗渣灰的可用数量。此外，还使用地理信息系统进行了详细的网络分析，以量化甘蔗渣灰、粉煤灰和矿渣来源与预拌混凝土厂的地理接近度。研究结果表明，对于印度的大多数预拌混凝土厂，接近甘蔗渣灰来源的可能性高于遇到矿渣/粉煤灰来源的可能性。
